mirror of
https://github.com/MariaDB/server.git
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Merge
This commit is contained in:
Igor Babaev
commit
ed511daf3c
65 changed files with 1072 additions and 995 deletions
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@ -403,7 +403,7 @@ Intersects(g1.g, g2.g) as i, Crosses(g1.g, g2.g) as r
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FROM gis_geometrycollection g1, gis_geometrycollection g2 ORDER BY first, second;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE g1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort
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1 SIMPLE g2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer
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1 SIMPLE g2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join)
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Warnings:
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Note 1003 select `test`.`g1`.`fid` AS `first`,`test`.`g2`.`fid` AS `second`,within(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `w`,contains(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `c`,overlaps(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `o`,equals(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `e`,disjoint(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `d`,touches(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `t`,intersects(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `i`,crosses(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `r` from `test`.`gis_geometrycollection` `g1` join `test`.`gis_geometrycollection` `g2` order by `test`.`g1`.`fid`,`test`.`g2`.`fid`
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DROP TABLE gis_point, gis_line, gis_polygon, gis_multi_point, gis_multi_line, gis_multi_polygon, gis_geometrycollection, gis_geometry;
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@ -1435,7 +1435,7 @@ companynr companynr
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explain select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t4 index NULL PRIMARY 1 NULL 12 Using index; Using temporary
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1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer
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1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join)
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select t2.fld1,t2.companynr,fld3,period from t3,t2 where t2.fld1 = 38208 and t2.fld1=t3.t2nr and period = 1008 or t2.fld1 = 38008 and t2.fld1 =t3.t2nr and period = 1008;
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fld1 companynr fld3 period
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038008 37 reporters 1008
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@ -1537,7 +1537,7 @@ explain
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select substr(Z.a,-1), Z.a from t1 as Y join t1 as Z on Y.a=Z.a order by 1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE Y ALL NULL NULL NULL NULL 2 Using temporary; Using filesort
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1 SIMPLE Z ALL NULL NULL NULL NULL 2 Using where; Using join buffer
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1 SIMPLE Z ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join)
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select substr(Z.a,-1), Z.a from t1 as Y join t1 as Z on Y.a=Z.a order by 1;
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substr(Z.a,-1) a
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3 123
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@ -58,7 +58,7 @@ a b a b
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explain select * from t1 as x1, (select * from t1) as x2;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY x1 ALL NULL NULL NULL NULL 4
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 4 Using join buffer
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 4 Using join buffer (flat, BNL join)
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2 DERIVED t1 ALL NULL NULL NULL NULL 4
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drop table if exists t2,t3;
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select * from (select 1) as a;
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@ -189,13 +189,13 @@ pla_id test
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explain SELECT STRAIGHT_JOIN d.pla_id, m2.mat_id FROM t1 m2 INNER JOIN (SELECT mp.pla_id, MIN(m1.matintnum) AS matintnum FROM t2 mp INNER JOIN t1 m1 ON mp.mat_id=m1.mat_id GROUP BY mp.pla_id) d ON d.matintnum=m2.matintnum;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY m2 ALL NULL NULL NULL NULL 9
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 6 Using where; Using join buffer
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
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2 DERIVED mp ALL NULL NULL NULL NULL 9 Using temporary; Using filesort
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2 DERIVED m1 eq_ref PRIMARY PRIMARY 3 test.mp.mat_id 1
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explain SELECT STRAIGHT_JOIN d.pla_id, m2.test FROM t1 m2 INNER JOIN (SELECT mp.pla_id, MIN(m1.matintnum) AS matintnum FROM t2 mp INNER JOIN t1 m1 ON mp.mat_id=m1.mat_id GROUP BY mp.pla_id) d ON d.matintnum=m2.matintnum;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY m2 ALL NULL NULL NULL NULL 9
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 6 Using where; Using join buffer
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
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2 DERIVED mp ALL NULL NULL NULL NULL 9 Using temporary; Using filesort
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2 DERIVED m1 eq_ref PRIMARY PRIMARY 3 test.mp.mat_id 1
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drop table t1,t2;
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@ -246,7 +246,7 @@ a a
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explain select * from ( select * from t1 union select * from t1) a,(select * from t1 union select * from t1) b;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2
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1 PRIMARY <derived4> ALL NULL NULL NULL NULL 2 Using join buffer
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1 PRIMARY <derived4> ALL NULL NULL NULL NULL 2 Using join buffer (flat, BNL join)
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4 DERIVED t1 ALL NULL NULL NULL NULL 2
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5 UNION t1 ALL NULL NULL NULL NULL 2
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NULL UNION RESULT <union4,5> ALL NULL NULL NULL NULL NULL
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@ -313,7 +313,7 @@ explain SELECT s.name, AVG(s.val) AS median FROM (SELECT x.name, x.val FROM t1 x
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 3 Using temporary; Using filesort
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2 DERIVED x ALL NULL NULL NULL NULL 17 Using temporary; Using filesort
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2 DERIVED y ALL NULL NULL NULL NULL 17 Using where; Using join buffer
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2 DERIVED y ALL NULL NULL NULL NULL 17 Using where; Using join buffer (flat, BNL join)
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drop table t1;
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create table t2 (a int, b int, primary key (a));
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insert into t2 values (1,7),(2,7);
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@ -175,7 +175,7 @@ explain SELECT distinct t3.a FROM t3,t2,t1 WHERE t3.a=t1.b AND t1.a=t2.a;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 4 Using where; Using temporary
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1 SIMPLE t3 ref a a 5 test.t1.b 2 Using index
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1 SIMPLE t2 index a a 4 NULL 5 Using where; Using index; Distinct; Using join buffer
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1 SIMPLE t2 index a a 4 NULL 5 Using where; Using index; Distinct; Using join buffer (flat, BNL join)
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SELECT distinct t3.a FROM t3,t2,t1 WHERE t3.a=t1.b AND t1.a=t2.a;
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a
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1
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@ -300,11 +300,11 @@ WHERE
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AND ((t1.id=j_lj_t3.id AND t3_lj.id IS NULL) OR (t1.id=t3.id AND t3.idx=2));
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 index id id 4 NULL 2 Using index; Using temporary
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1 SIMPLE t2 index id id 8 NULL 1 Using index; Distinct; Using join buffer
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1 SIMPLE t3 index id id 8 NULL 1 Using index; Distinct; Using join buffer
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1 SIMPLE j_lj_t2 index id id 4 NULL 2 Using where; Using index; Distinct; Using join buffer
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1 SIMPLE t2 index id id 8 NULL 1 Using index; Distinct; Using join buffer (flat, BNL join)
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1 SIMPLE t3 index id id 8 NULL 1 Using index; Distinct; Using join buffer (flat, BNL join)
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1 SIMPLE j_lj_t2 index id id 4 NULL 2 Using where; Using index; Distinct; Using join buffer (flat, BNL join)
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1 SIMPLE t2_lj ref id id 4 test.j_lj_t2.id 1 Using where; Using index; Distinct
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1 SIMPLE j_lj_t3 index id id 4 NULL 2 Using where; Using index; Distinct; Using join buffer
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1 SIMPLE j_lj_t3 index id id 4 NULL 2 Using where; Using index; Distinct; Using join buffer (flat, BNL join)
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1 SIMPLE t3_lj ref id id 4 test.j_lj_t3.id 1 Using where; Using index; Distinct
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SELECT DISTINCT
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t1.id
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@ -515,7 +515,7 @@ id select_type table type possible_keys key key_len ref rows Extra
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EXPLAIN SELECT DISTINCT t1_1.a, t1_1.b FROM t1 t1_1, t1 t1_2;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1_1 ALL NULL NULL NULL NULL 3 Using temporary
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1 SIMPLE t1_2 index NULL PRIMARY 4 NULL 3 Using index; Distinct; Using join buffer
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1 SIMPLE t1_2 index NULL PRIMARY 4 NULL 3 Using index; Distinct; Using join buffer (flat, BNL join)
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EXPLAIN SELECT DISTINCT t1_1.a, t1_1.b FROM t1 t1_1, t1 t1_2
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WHERE t1_1.a = t1_2.a;
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id select_type table type possible_keys key key_len ref rows Extra
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@ -116,7 +116,7 @@ FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 100.00
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2 DERIVED t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort
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2 DERIVED t2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer
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2 DERIVED t2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join)
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Warnings:
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Note 1003 select 1 AS `1` from (select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT t1.a)` from `test`.`t1` join `test`.`t2` group by `test`.`t1`.`a`) `s1`
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EXPLAIN EXTENDED SELECT 1
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@ -124,7 +124,7 @@ FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 100.00
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2 DERIVED t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort
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2 DERIVED t2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer
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2 DERIVED t2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join)
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Warnings:
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Note 1003 select 1 AS `1` from (select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT t1.a)` from `test`.`t1` join `test`.`t2` group by `test`.`t1`.`a`) `s1`
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prepare s1 from
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@ -134,7 +134,7 @@ execute s1;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 100.00
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2 DERIVED t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort
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2 DERIVED t2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer
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2 DERIVED t2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join)
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Warnings:
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Note 1003 select 1 AS `1` from (select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT t1.a)` from `test`.`t1` join `test`.`t2` group by `test`.`t1`.`a`) `s1`
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prepare s1 from
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@ -144,14 +144,14 @@ execute s1;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 100.00
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2 DERIVED t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort
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2 DERIVED t2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer
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2 DERIVED t2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join)
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Warnings:
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Note 1003 select 1 AS `1` from (select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT t1.a)` from `test`.`t1` join `test`.`t2` group by `test`.`t1`.`a`) `s1`
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execute s1;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 100.00
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2 DERIVED t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort
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2 DERIVED t2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer
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2 DERIVED t2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join)
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Warnings:
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Note 1003 select 1 AS `1` from (select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT t1.a)` from `test`.`t1` join `test`.`t2` group by `test`.`t1`.`a`) `s1`
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DROP TABLE t1,t2;
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@ -986,7 +986,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY <derived2> system NULL NULL NULL NULL 1 100.00
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1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00
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2 DERIVED t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort; Distinct
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2 DERIVED td ALL NULL NULL NULL NULL 2 100.00 Distinct; Using join buffer
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2 DERIVED td ALL NULL NULL NULL NULL 2 100.00 Distinct; Using join buffer (flat, BNL join)
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Warnings:
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Note 1003 select 1 AS `1` from (select distinct group_concat(`test`.`td`.`f1` separator ',') AS `GROUP_CONCAT(td.f1)` from `test`.`t1` join `test`.`t1` `td` group by `test`.`td`.`f1`) `d` join `test`.`t1`
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SELECT 1 FROM
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@ -1006,7 +1006,7 @@ t1 t2, t1 GROUP BY t1.a) AS d;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY <derived2> system NULL NULL NULL NULL 1 100.00
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2 DERIVED t2 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort
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2 DERIVED t1 ALL NULL NULL NULL NULL 2 100.00 Using join buffer
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2 DERIVED t1 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join)
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Warnings:
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Note 1003 select 1 AS `1` from (select group_concat(`test`.`t1`.`a` order by `test`.`t1`.`a` ASC separator ',') AS `GROUP_CONCAT(t1.a ORDER BY t1.a ASC)` from `test`.`t1` `t2` join `test`.`t1` group by `test`.`t1`.`a`) `d`
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DROP TABLE t1;
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@ -614,7 +614,7 @@ explain
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select max(t1.a3), min(t2.a2) from t1, t2 where t1.a2 = 2 and t1.a3 < 'MIN' and t2.a3 > 'CA';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range k1 k1 7 NULL 1 Using where; Using index
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1 SIMPLE t2 range k1 k1 3 NULL 4 Using where; Using index; Using join buffer
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1 SIMPLE t2 range k1 k1 3 NULL 4 Using where; Using index; Using join buffer (flat, BNL join)
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explain
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select min(a4 - 0.01) from t1;
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id select_type table type possible_keys key key_len ref rows Extra
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@ -651,7 +651,7 @@ explain
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select concat(min(t1.a1),min(t2.a4)) from t1, t2 where t2.a4 <> 'AME';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 range k2 k2 4 NULL 6 Using where; Using index
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1 SIMPLE t1 index NULL PRIMARY 3 NULL 15 Using index; Using join buffer
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1 SIMPLE t1 index NULL PRIMARY 3 NULL 15 Using index; Using join buffer (flat, BNL join)
|
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drop table t1, t2;
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create table t1 (a char(10));
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insert into t1 values ('a'),('b'),('c');
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@ -79,7 +79,7 @@ min(7)
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explain select min(7) from t2i join t1i;
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id select_type table type possible_keys key key_len ref rows Extra
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||||
1 SIMPLE t2i ALL NULL NULL NULL NULL 1
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||||
1 SIMPLE t1i ALL NULL NULL NULL NULL 1 Using join buffer
|
||||
1 SIMPLE t1i ALL NULL NULL NULL NULL 1 Using join buffer (flat, BNL join)
|
||||
select min(7) from t2i join t1i;
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||||
min(7)
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NULL
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@ -95,7 +95,7 @@ max(7)
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explain select max(7) from t2i join t1i;
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id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2i ALL NULL NULL NULL NULL 1
|
||||
1 SIMPLE t1i ALL NULL NULL NULL NULL 1 Using join buffer
|
||||
1 SIMPLE t1i ALL NULL NULL NULL NULL 1 Using join buffer (flat, BNL join)
|
||||
select max(7) from t2i join t1i;
|
||||
max(7)
|
||||
NULL
|
||||
|
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|||
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@ -2550,12 +2550,12 @@ insert into t1 values (-1),(null);
|
|||
explain select 1 as a from t1,(select decode(f1,f1) as b from t1) a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
|
||||
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 Using join buffer
|
||||
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 Using join buffer (flat, BNL join)
|
||||
2 DERIVED t1 ALL NULL NULL NULL NULL 2
|
||||
explain select 1 as a from t1,(select encode(f1,f1) as b from t1) a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
|
||||
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 Using join buffer
|
||||
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 Using join buffer (flat, BNL join)
|
||||
2 DERIVED t1 ALL NULL NULL NULL NULL 2
|
||||
drop table t1;
|
||||
#
|
||||
|
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|
|||
|
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@ -395,7 +395,7 @@ Intersects(g1.g, g2.g) as i, Crosses(g1.g, g2.g) as r
|
|||
FROM gis_geometrycollection g1, gis_geometrycollection g2 ORDER BY first, second;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE g1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort
|
||||
1 SIMPLE g2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer
|
||||
1 SIMPLE g2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`g1`.`fid` AS `first`,`test`.`g2`.`fid` AS `second`,within(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `w`,contains(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `c`,overlaps(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `o`,equals(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `e`,disjoint(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `d`,touches(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `t`,intersects(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `i`,crosses(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `r` from `test`.`gis_geometrycollection` `g1` join `test`.`gis_geometrycollection` `g2` order by `test`.`g1`.`fid`,`test`.`g2`.`fid`
|
||||
DROP TABLE gis_point, gis_line, gis_polygon, gis_multi_point, gis_multi_line, gis_multi_polygon, gis_geometrycollection, gis_geometry;
|
||||
|
|
|
|||
|
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@ -121,11 +121,11 @@ select @@optimizer_search_depth;
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -133,11 +133,11 @@ Last_query_cost 821.837037
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -145,11 +145,11 @@ Last_query_cost 821.837037
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -157,11 +157,11 @@ Last_query_cost 794.837037
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -169,11 +169,11 @@ Last_query_cost 794.837037
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -181,11 +181,11 @@ Last_query_cost 794.837037
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -201,11 +201,11 @@ select @@optimizer_search_depth;
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -213,11 +213,11 @@ Last_query_cost 821.837037
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -225,11 +225,11 @@ Last_query_cost 821.837037
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -237,11 +237,11 @@ Last_query_cost 289.418727
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -249,11 +249,11 @@ Last_query_cost 289.418727
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -261,11 +261,11 @@ Last_query_cost 289.418727
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -277,11 +277,11 @@ select @@optimizer_search_depth;
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -289,11 +289,11 @@ Last_query_cost 821.837037
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -304,9 +304,9 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
Last_query_cost 794.837037
|
||||
|
|
@ -316,9 +316,9 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
Last_query_cost 794.837037
|
||||
|
|
@ -328,9 +328,9 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
Last_query_cost 794.837037
|
||||
|
|
@ -340,9 +340,9 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
Last_query_cost 794.837037
|
||||
|
|
@ -353,11 +353,11 @@ select @@optimizer_search_depth;
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -365,11 +365,11 @@ Last_query_cost 821.837037
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -377,11 +377,11 @@ Last_query_cost 821.837037
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -389,11 +389,11 @@ Last_query_cost 289.418727
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -401,11 +401,11 @@ Last_query_cost 289.418727
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -413,11 +413,11 @@ Last_query_cost 289.418727
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -433,11 +433,11 @@ select @@optimizer_search_depth;
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -445,11 +445,11 @@ Last_query_cost 821.837037
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -457,11 +457,11 @@ Last_query_cost 821.837037
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -469,11 +469,11 @@ Last_query_cost 794.837037
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -481,11 +481,11 @@ Last_query_cost 794.837037
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -493,11 +493,11 @@ Last_query_cost 794.837037
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -509,11 +509,11 @@ select @@optimizer_search_depth;
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -521,11 +521,11 @@ Last_query_cost 821.837037
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -536,9 +536,9 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
Last_query_cost 794.837037
|
||||
|
|
@ -548,9 +548,9 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
Last_query_cost 794.837037
|
||||
|
|
@ -560,9 +560,9 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
Last_query_cost 794.837037
|
||||
|
|
@ -572,9 +572,9 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
Last_query_cost 794.837037
|
||||
|
|
@ -585,11 +585,11 @@ select @@optimizer_search_depth;
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -597,11 +597,11 @@ Last_query_cost 821.837037
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -609,11 +609,11 @@ Last_query_cost 821.837037
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -621,11 +621,11 @@ Last_query_cost 794.837037
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -633,11 +633,11 @@ Last_query_cost 794.837037
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -645,11 +645,11 @@ Last_query_cost 794.837037
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
|
|||
|
|
@ -537,11 +537,11 @@ a b
|
|||
explain select t1.a,t2.b from t1,t2 where t1.a=t2.a group by t1.a,t2.b;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 6 Using temporary; Using filesort
|
||||
1 SIMPLE t2 ALL a NULL NULL NULL 4 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL a NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join)
|
||||
explain select t1.a,t2.b from t1,t2 where t1.a=t2.a group by t1.a,t2.b ORDER BY NULL;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 6 Using temporary
|
||||
1 SIMPLE t2 ALL a NULL NULL NULL 4 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL a NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join)
|
||||
drop table t1,t2;
|
||||
create table t1 (a int, b int);
|
||||
insert into t1 values (1, 4),(10, 40),(1, 4),(10, 43),(1, 4),(10, 41),(1, 4),(10, 43),(1, 4);
|
||||
|
|
|
|||
|
|
@ -2267,7 +2267,7 @@ ON t1_outer1.a = (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2)
|
|||
AND t1_outer1.b = t1_outer2.b;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1_outer1 ref a a 5 const 1 Using where; Using index
|
||||
1 PRIMARY t1_outer2 index NULL a 10 NULL 15 Using where; Using index; Using join buffer
|
||||
1 PRIMARY t1_outer2 index NULL a 10 NULL 15 Using where; Using index; Using join buffer (flat, BNL join)
|
||||
2 SUBQUERY t1 range NULL a 5 NULL 8 Using index for group-by
|
||||
EXPLAIN SELECT (SELECT (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) x
|
||||
FROM t1 AS t1_outer) x2 FROM t1 AS t1_outer2;
|
||||
|
|
|
|||
|
|
@ -271,7 +271,7 @@ explain select * from t0,t1 where t0.key1 = 5 and
|
|||
(t1.key1 = t0.key1 or t1.key8 = t0.key1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t0 ref i1 i1 4 const 1
|
||||
1 SIMPLE t1 index_merge i1,i8 i1,i8 4,4 NULL 2 Using union(i1,i8); Using where; Using join buffer
|
||||
1 SIMPLE t1 index_merge i1,i8 i1,i8 4,4 NULL 2 Using union(i1,i8); Using where; Using join buffer (flat, BNL join)
|
||||
explain select * from t0,t1 where t0.key1 < 3 and
|
||||
(t1.key1 = t0.key1 or t1.key8 = t0.key1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
|
|
@ -348,7 +348,7 @@ where (A.key1 < 500000 or A.key2 < 3)
|
|||
and (B.key1 < 500000 or B.key2 < 3);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE A index_merge i1,i2 i1,i2 4,4 NULL 1013 Using sort_union(i1,i2); Using where
|
||||
1 SIMPLE B index_merge i1,i2 i1,i2 4,4 NULL 1013 Using sort_union(i1,i2); Using where; Using join buffer
|
||||
1 SIMPLE B index_merge i1,i2 i1,i2 4,4 NULL 1013 Using sort_union(i1,i2); Using where; Using join buffer (flat, BNL join)
|
||||
select max(A.key1 + B.key1 + A.key2 + B.key2 + A.key3 + B.key3 + A.key4 + B.key4 + A.key5 + B.key5)
|
||||
from t0 as A force index(i1,i2), t0 as B force index (i1,i2)
|
||||
where (A.key1 < 500000 or A.key2 < 3)
|
||||
|
|
@ -362,7 +362,7 @@ where (A.key1 = 1 or A.key2 = 1)
|
|||
and (B.key1 = 1 or B.key2 = 1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE A index_merge i1,i2 i1,i2 4,4 NULL 1020 Using union(i1,i2); Using where
|
||||
1 SIMPLE B index_merge i1,i2 i1,i2 4,4 NULL 1020 Using union(i1,i2); Using where; Using join buffer
|
||||
1 SIMPLE B index_merge i1,i2 i1,i2 4,4 NULL 1020 Using union(i1,i2); Using where; Using join buffer (flat, BNL join)
|
||||
select max(A.key1 + B.key1 + A.key2 + B.key2 + A.key3 + B.key3 + A.key4 + B.key4 + A.key5 + B.key5)
|
||||
from t0 as A force index(i1,i2), t0 as B force index (i1,i2)
|
||||
where (A.key1 = 1 or A.key2 = 1)
|
||||
|
|
@ -377,7 +377,7 @@ where (A.key1 = 1 and A.key2 = 1 and A.key3 = 1 and A.key4=1 and A.key5=1 and A.
|
|||
and (B.key1 = 1 and B.key2 = 1 and B.key3 = 1 and B.key4=1 and B.key5=1 and B.key6=1 and B.key7 = 1 or B.key8=1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE A index_merge i1,i2,i3,i4,i5,i6,i7?,i8 i2,i3,i4,i5,i6,i7?,i8 X NULL # Using union(intersect(i2,i3,i4,i5,i6,i7?),i8); Using where
|
||||
1 SIMPLE B index_merge i1,i2,i3,i4,i5,i6,i7?,i8 i2,i3,i4,i5,i6,i7?,i8 X NULL # Using union(intersect(i2,i3,i4,i5,i6,i7?),i8); Using where; Using join buffer
|
||||
1 SIMPLE B index_merge i1,i2,i3,i4,i5,i6,i7?,i8 i2,i3,i4,i5,i6,i7?,i8 X NULL # Using union(intersect(i2,i3,i4,i5,i6,i7?),i8); Using where; Using join buffer (flat, BNL join)
|
||||
select max(A.key1 + B.key1 + A.key2 + B.key2 + A.key3 + B.key3 + A.key4 + B.key4 + A.key5 + B.key5)
|
||||
from t0 as A, t0 as B
|
||||
where (A.key1 = 1 and A.key2 = 1 and A.key3 = 1 and A.key4=1 and A.key5=1 and A.key6=1 and A.key7 = 1 or A.key8=1)
|
||||
|
|
|
|||
|
|
@ -323,7 +323,7 @@ information_schema.SCHEMATA b where
|
|||
a.ROUTINE_SCHEMA = b.SCHEMA_NAME;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE # ALL NULL NULL NULL NULL NULL
|
||||
1 SIMPLE # ALL NULL NULL NULL NULL NULL Using where; Using join buffer
|
||||
1 SIMPLE # ALL NULL NULL NULL NULL NULL Using where; Using join buffer (flat, BNL join)
|
||||
select a.ROUTINE_NAME, b.name from information_schema.ROUTINES a,
|
||||
mysql.proc b where a.ROUTINE_NAME = convert(b.name using utf8) AND a.ROUTINE_SCHEMA='test' order by 1;
|
||||
ROUTINE_NAME name
|
||||
|
|
@ -1450,7 +1450,7 @@ from information_schema.tables a, information_schema.columns b
|
|||
where a.table_name='t1' and a.table_schema='test' and b.table_name=a.table_name;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE a ALL NULL TABLE_SCHEMA,TABLE_NAME NULL NULL NULL Using where; Skip_open_table; Scanned 0 databases
|
||||
1 SIMPLE b ALL NULL NULL NULL NULL NULL Using where; Open_frm_only; Scanned all databases; Using join buffer
|
||||
1 SIMPLE b ALL NULL NULL NULL NULL NULL Using where; Open_frm_only; Scanned all databases; Using join buffer (flat, BNL join)
|
||||
SELECT * FROM INFORMATION_SCHEMA.SCHEMATA
|
||||
WHERE SCHEMA_NAME = 'mysqltest';
|
||||
CATALOG_NAME SCHEMA_NAME DEFAULT_CHARACTER_SET_NAME DEFAULT_COLLATION_NAME SQL_PATH
|
||||
|
|
|
|||
|
|
@ -403,7 +403,7 @@ Intersects(g1.g, g2.g) as i, Crosses(g1.g, g2.g) as r
|
|||
FROM gis_geometrycollection g1, gis_geometrycollection g2 ORDER BY first, second;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE g1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort
|
||||
1 SIMPLE g2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer
|
||||
1 SIMPLE g2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`g1`.`fid` AS `first`,`test`.`g2`.`fid` AS `second`,within(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `w`,contains(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `c`,overlaps(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `o`,equals(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `e`,disjoint(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `d`,touches(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `t`,intersects(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `i`,crosses(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `r` from `test`.`gis_geometrycollection` `g1` join `test`.`gis_geometrycollection` `g2` order by `test`.`g1`.`fid`,`test`.`g2`.`fid`
|
||||
DROP TABLE gis_point, gis_line, gis_polygon, gis_multi_point, gis_multi_line, gis_multi_polygon, gis_geometrycollection, gis_geometry;
|
||||
|
|
|
|||
|
|
@ -187,7 +187,7 @@ min(7)
|
|||
explain select min(7) from t2i join t1i;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2i ALL NULL NULL NULL NULL 1
|
||||
1 SIMPLE t1i ALL NULL NULL NULL NULL 1 Using join buffer
|
||||
1 SIMPLE t1i ALL NULL NULL NULL NULL 1 Using join buffer (flat, BNL join)
|
||||
select min(7) from t2i join t1i;
|
||||
min(7)
|
||||
NULL
|
||||
|
|
@ -203,7 +203,7 @@ max(7)
|
|||
explain select max(7) from t2i join t1i;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2i ALL NULL NULL NULL NULL 1
|
||||
1 SIMPLE t1i ALL NULL NULL NULL NULL 1 Using join buffer
|
||||
1 SIMPLE t1i ALL NULL NULL NULL NULL 1 Using join buffer (flat, BNL join)
|
||||
select max(7) from t2i join t1i;
|
||||
max(7)
|
||||
NULL
|
||||
|
|
|
|||
|
|
@ -404,7 +404,7 @@ SELECT STRAIGHT_JOIN t2.e FROM t1,t2 WHERE t2.d=1 AND t1.b=t2.e
|
|||
ORDER BY t1.b, t1.c;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 32 Using temporary; Using filesort
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 16 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 16 Using where; Using join buffer (flat, BNL join)
|
||||
SELECT STRAIGHT_JOIN t2.e FROM t1,t2 WHERE t2.d=1 AND t1.b=t2.e
|
||||
ORDER BY t1.b, t1.c;
|
||||
e
|
||||
|
|
@ -1099,7 +1099,7 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 SIMPLE t4 ALL NULL NULL NULL NULL 0 Using where
|
||||
1 SIMPLE t5 ALL NULL NULL NULL NULL 0 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 0 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 10 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 10 Using where; Using join buffer (flat, BNL join)
|
||||
SELECT *
|
||||
FROM
|
||||
t1 JOIN t2 ON t1.a = t2.a
|
||||
|
|
|
|||
|
|
@ -45,7 +45,7 @@ WHERE City.Country=Country.Code AND
|
|||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where
|
||||
1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer
|
||||
1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer (flat, BNL join)
|
||||
SELECT City.Name, Country.Name FROM City,Country
|
||||
WHERE City.Country=Country.Code AND
|
||||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
|
|
@ -74,8 +74,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND
|
|||
CountryLanguage.Percentage > 50;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where
|
||||
1 SIMPLE CountryLanguage ALL NULL NULL NULL NULL 984 Using where; Using join buffer
|
||||
1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer
|
||||
1 SIMPLE CountryLanguage ALL NULL NULL NULL NULL 984 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer (flat, BNL join)
|
||||
SELECT City.Name, Country.Name, CountryLanguage.Language
|
||||
FROM City,Country,CountryLanguage
|
||||
WHERE City.Country=Country.Code AND
|
||||
|
|
@ -233,7 +233,7 @@ WHERE City.Country=Country.Code AND
|
|||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where
|
||||
1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer
|
||||
1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer (flat, BNL join)
|
||||
SELECT City.Name, Country.Name FROM City,Country
|
||||
WHERE City.Country=Country.Code AND
|
||||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
|
|
@ -262,8 +262,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND
|
|||
CountryLanguage.Percentage > 50;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where
|
||||
1 SIMPLE CountryLanguage ALL NULL NULL NULL NULL 984 Using where; Using join buffer
|
||||
1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer
|
||||
1 SIMPLE CountryLanguage ALL NULL NULL NULL NULL 984 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer (incremental, BNL join)
|
||||
SELECT City.Name, Country.Name, CountryLanguage.Language
|
||||
FROM City,Country,CountryLanguage
|
||||
WHERE City.Country=Country.Code AND
|
||||
|
|
@ -425,7 +425,7 @@ WHERE City.Country=Country.Code AND
|
|||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where
|
||||
1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer
|
||||
1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer (flat, BNL join)
|
||||
SELECT City.Name, Country.Name FROM City,Country
|
||||
WHERE City.Country=Country.Code AND
|
||||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
|
|
@ -454,8 +454,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND
|
|||
CountryLanguage.Percentage > 50;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where
|
||||
1 SIMPLE CountryLanguage ALL NULL NULL NULL NULL 984 Using where; Using join buffer
|
||||
1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer
|
||||
1 SIMPLE CountryLanguage ALL NULL NULL NULL NULL 984 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer (flat, BNL join)
|
||||
SELECT City.Name, Country.Name, CountryLanguage.Language
|
||||
FROM City,Country,CountryLanguage
|
||||
WHERE City.Country=Country.Code AND
|
||||
|
|
@ -613,7 +613,7 @@ WHERE City.Country=Country.Code AND
|
|||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where
|
||||
1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer
|
||||
1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer (flat, BNL join)
|
||||
SELECT City.Name, Country.Name FROM City,Country
|
||||
WHERE City.Country=Country.Code AND
|
||||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
|
|
@ -642,8 +642,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND
|
|||
CountryLanguage.Percentage > 50;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where
|
||||
1 SIMPLE CountryLanguage ALL NULL NULL NULL NULL 984 Using where; Using join buffer
|
||||
1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer
|
||||
1 SIMPLE CountryLanguage ALL NULL NULL NULL NULL 984 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer (incremental, BNL join)
|
||||
SELECT City.Name, Country.Name, CountryLanguage.Language
|
||||
FROM City,Country,CountryLanguage
|
||||
WHERE City.Country=Country.Code AND
|
||||
|
|
@ -840,7 +840,7 @@ WHERE City.Country=Country.Code AND
|
|||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
|
||||
1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BNLH join)
|
||||
SELECT City.Name, Country.Name FROM City,Country
|
||||
WHERE City.Country=Country.Code AND
|
||||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
|
|
@ -869,8 +869,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND
|
|||
CountryLanguage.Percentage > 50;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where
|
||||
1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer
|
||||
1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer (flat, BNLH join)
|
||||
1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BNLH join)
|
||||
SELECT City.Name, Country.Name, CountryLanguage.Language
|
||||
FROM City,Country,CountryLanguage
|
||||
WHERE City.Country=Country.Code AND
|
||||
|
|
@ -1024,7 +1024,7 @@ WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AN
|
|||
City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
|
||||
1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BNLH join)
|
||||
SELECT Name FROM City
|
||||
WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND
|
||||
City.Population > 100000;
|
||||
|
|
@ -1052,7 +1052,7 @@ WHERE
|
|||
Country.Population > 10000000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where
|
||||
1 SIMPLE CountryLanguage eq_ref PRIMARY PRIMARY 33 world.Country.Code,const 1 Using where; Using join buffer
|
||||
1 SIMPLE CountryLanguage eq_ref PRIMARY PRIMARY 33 world.Country.Code,const 1 Using where; Using join buffer (flat, BNLH join)
|
||||
SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage)
|
||||
FROM Country LEFT JOIN CountryLanguage ON
|
||||
(CountryLanguage.Country=Country.Code AND Language='English')
|
||||
|
|
@ -1150,7 +1150,7 @@ WHERE City.Country=Country.Code AND
|
|||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
|
||||
1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BNLH join)
|
||||
SELECT City.Name, Country.Name FROM City,Country
|
||||
WHERE City.Country=Country.Code AND
|
||||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
|
|
@ -1179,8 +1179,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND
|
|||
CountryLanguage.Percentage > 50;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where
|
||||
1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer
|
||||
1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer (flat, BNLH join)
|
||||
1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using where; Using join buffer (incremental, BNLH join)
|
||||
SELECT City.Name, Country.Name, CountryLanguage.Language
|
||||
FROM City,Country,CountryLanguage
|
||||
WHERE City.Country=Country.Code AND
|
||||
|
|
@ -1334,7 +1334,7 @@ WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AN
|
|||
City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
|
||||
1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BNLH join)
|
||||
SELECT Name FROM City
|
||||
WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND
|
||||
City.Population > 100000;
|
||||
|
|
@ -1362,7 +1362,7 @@ WHERE
|
|||
Country.Population > 10000000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where
|
||||
1 SIMPLE CountryLanguage eq_ref PRIMARY PRIMARY 33 world.Country.Code,const 1 Using where; Using join buffer
|
||||
1 SIMPLE CountryLanguage eq_ref PRIMARY PRIMARY 33 world.Country.Code,const 1 Using where; Using join buffer (flat, BNLH join)
|
||||
SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage)
|
||||
FROM Country LEFT JOIN CountryLanguage ON
|
||||
(CountryLanguage.Country=Country.Code AND Language='English')
|
||||
|
|
@ -1460,7 +1460,7 @@ WHERE City.Country=Country.Code AND
|
|||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
|
||||
1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKA join)
|
||||
SELECT City.Name, Country.Name FROM City,Country
|
||||
WHERE City.Country=Country.Code AND
|
||||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
|
|
@ -1489,8 +1489,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND
|
|||
CountryLanguage.Percentage > 50;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where
|
||||
1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer
|
||||
1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer
|
||||
1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer (flat, BKA join)
|
||||
1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer (flat, BKA join)
|
||||
SELECT City.Name, Country.Name, CountryLanguage.Language
|
||||
FROM City,Country,CountryLanguage
|
||||
WHERE City.Country=Country.Code AND
|
||||
|
|
@ -1644,7 +1644,7 @@ WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AN
|
|||
City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
|
||||
1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKA join)
|
||||
SELECT Name FROM City
|
||||
WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND
|
||||
City.Population > 100000;
|
||||
|
|
@ -1672,7 +1672,7 @@ WHERE
|
|||
Country.Population > 10000000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where
|
||||
1 SIMPLE CountryLanguage eq_ref PRIMARY PRIMARY 33 world.Country.Code,const 1 Using where; Using join buffer
|
||||
1 SIMPLE CountryLanguage eq_ref PRIMARY PRIMARY 33 world.Country.Code,const 1 Using where; Using join buffer (flat, BKA join)
|
||||
SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage)
|
||||
FROM Country LEFT JOIN CountryLanguage ON
|
||||
(CountryLanguage.Country=Country.Code AND Language='English')
|
||||
|
|
@ -1767,7 +1767,7 @@ WHERE City.Country=Country.Code AND
|
|||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
|
||||
1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKA join)
|
||||
SELECT City.Name, Country.Name FROM City,Country
|
||||
WHERE City.Country=Country.Code AND
|
||||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
|
|
@ -1796,8 +1796,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND
|
|||
CountryLanguage.Percentage > 50;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where
|
||||
1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer
|
||||
1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer
|
||||
1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer (flat, BKA join)
|
||||
1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer (incremental, BKA join)
|
||||
SELECT City.Name, Country.Name, CountryLanguage.Language
|
||||
FROM City,Country,CountryLanguage
|
||||
WHERE City.Country=Country.Code AND
|
||||
|
|
@ -1951,7 +1951,7 @@ WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AN
|
|||
City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
|
||||
1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKA join)
|
||||
SELECT Name FROM City
|
||||
WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND
|
||||
City.Population > 100000;
|
||||
|
|
@ -1979,7 +1979,7 @@ WHERE
|
|||
Country.Population > 10000000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where
|
||||
1 SIMPLE CountryLanguage eq_ref PRIMARY PRIMARY 33 world.Country.Code,const 1 Using where; Using join buffer
|
||||
1 SIMPLE CountryLanguage eq_ref PRIMARY PRIMARY 33 world.Country.Code,const 1 Using where; Using join buffer (flat, BKA join)
|
||||
SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage)
|
||||
FROM Country LEFT JOIN CountryLanguage ON
|
||||
(CountryLanguage.Country=Country.Code AND Language='English')
|
||||
|
|
@ -2074,7 +2074,7 @@ WHERE City.Country=Country.Code AND
|
|||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
|
||||
1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKAH join)
|
||||
SELECT City.Name, Country.Name FROM City,Country
|
||||
WHERE City.Country=Country.Code AND
|
||||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
|
|
@ -2103,8 +2103,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND
|
|||
CountryLanguage.Percentage > 50;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where
|
||||
1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer
|
||||
1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer
|
||||
1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer (flat, BKAH join)
|
||||
1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer (flat, BKAH join)
|
||||
SELECT City.Name, Country.Name, CountryLanguage.Language
|
||||
FROM City,Country,CountryLanguage
|
||||
WHERE City.Country=Country.Code AND
|
||||
|
|
@ -2258,7 +2258,7 @@ WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AN
|
|||
City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
|
||||
1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKAH join)
|
||||
SELECT Name FROM City
|
||||
WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND
|
||||
City.Population > 100000;
|
||||
|
|
@ -2286,7 +2286,7 @@ WHERE
|
|||
Country.Population > 10000000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where
|
||||
1 SIMPLE CountryLanguage eq_ref PRIMARY PRIMARY 33 world.Country.Code,const 1 Using where; Using join buffer
|
||||
1 SIMPLE CountryLanguage eq_ref PRIMARY PRIMARY 33 world.Country.Code,const 1 Using where; Using join buffer (flat, BKAH join)
|
||||
SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage)
|
||||
FROM Country LEFT JOIN CountryLanguage ON
|
||||
(CountryLanguage.Country=Country.Code AND Language='English')
|
||||
|
|
@ -2381,7 +2381,7 @@ WHERE City.Country=Country.Code AND
|
|||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
|
||||
1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKAH join)
|
||||
SELECT City.Name, Country.Name FROM City,Country
|
||||
WHERE City.Country=Country.Code AND
|
||||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
|
|
@ -2410,8 +2410,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND
|
|||
CountryLanguage.Percentage > 50;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where
|
||||
1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer
|
||||
1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer
|
||||
1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer (flat, BKAH join)
|
||||
1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer (incremental, BKAH join)
|
||||
SELECT City.Name, Country.Name, CountryLanguage.Language
|
||||
FROM City,Country,CountryLanguage
|
||||
WHERE City.Country=Country.Code AND
|
||||
|
|
@ -2565,7 +2565,7 @@ WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AN
|
|||
City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
|
||||
1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKAH join)
|
||||
SELECT Name FROM City
|
||||
WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND
|
||||
City.Population > 100000;
|
||||
|
|
@ -2593,7 +2593,7 @@ WHERE
|
|||
Country.Population > 10000000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where
|
||||
1 SIMPLE CountryLanguage eq_ref PRIMARY PRIMARY 33 world.Country.Code,const 1 Using where; Using join buffer
|
||||
1 SIMPLE CountryLanguage eq_ref PRIMARY PRIMARY 33 world.Country.Code,const 1 Using where; Using join buffer (flat, BKAH join)
|
||||
SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage)
|
||||
FROM Country LEFT JOIN CountryLanguage ON
|
||||
(CountryLanguage.Country=Country.Code AND Language='English')
|
||||
|
|
@ -2692,7 +2692,7 @@ WHERE City.Country=Country.Code AND
|
|||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
|
||||
1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BNLH join)
|
||||
SELECT City.Name, Country.Name FROM City,Country
|
||||
WHERE City.Country=Country.Code AND
|
||||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
|
|
@ -2721,8 +2721,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND
|
|||
CountryLanguage.Percentage > 50;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where
|
||||
1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer
|
||||
1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer (flat, BNLH join)
|
||||
1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BNLH join)
|
||||
SELECT City.Name, Country.Name, CountryLanguage.Language
|
||||
FROM City,Country,CountryLanguage
|
||||
WHERE City.Country=Country.Code AND
|
||||
|
|
@ -2876,7 +2876,7 @@ WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AN
|
|||
City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
|
||||
1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BNLH join)
|
||||
SELECT Name FROM City
|
||||
WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND
|
||||
City.Population > 100000;
|
||||
|
|
@ -2906,7 +2906,7 @@ WHERE City.Country=Country.Code AND
|
|||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
|
||||
1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BNLH join)
|
||||
SELECT City.Name, Country.Name FROM City,Country
|
||||
WHERE City.Country=Country.Code AND
|
||||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
|
|
@ -2935,8 +2935,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND
|
|||
CountryLanguage.Percentage > 50;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where
|
||||
1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer
|
||||
1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer (flat, BNLH join)
|
||||
1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using where; Using join buffer (incremental, BNLH join)
|
||||
SELECT City.Name, Country.Name, CountryLanguage.Language
|
||||
FROM City,Country,CountryLanguage
|
||||
WHERE City.Country=Country.Code AND
|
||||
|
|
@ -3090,7 +3090,7 @@ WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AN
|
|||
City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
|
||||
1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BNLH join)
|
||||
SELECT Name FROM City
|
||||
WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND
|
||||
City.Population > 100000;
|
||||
|
|
@ -3120,7 +3120,7 @@ WHERE City.Country=Country.Code AND
|
|||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
|
||||
1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKA join)
|
||||
SELECT City.Name, Country.Name FROM City,Country
|
||||
WHERE City.Country=Country.Code AND
|
||||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
|
|
@ -3149,8 +3149,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND
|
|||
CountryLanguage.Percentage > 50;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where
|
||||
1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer
|
||||
1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer
|
||||
1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer (flat, BKA join)
|
||||
1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer (flat, BKA join)
|
||||
SELECT City.Name, Country.Name, CountryLanguage.Language
|
||||
FROM City,Country,CountryLanguage
|
||||
WHERE City.Country=Country.Code AND
|
||||
|
|
@ -3304,7 +3304,7 @@ WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AN
|
|||
City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
|
||||
1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKA join)
|
||||
SELECT Name FROM City
|
||||
WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND
|
||||
City.Population > 100000;
|
||||
|
|
@ -3334,7 +3334,7 @@ WHERE City.Country=Country.Code AND
|
|||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
|
||||
1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKA join)
|
||||
SELECT City.Name, Country.Name FROM City,Country
|
||||
WHERE City.Country=Country.Code AND
|
||||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
|
|
@ -3363,8 +3363,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND
|
|||
CountryLanguage.Percentage > 50;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where
|
||||
1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer
|
||||
1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer
|
||||
1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer (flat, BKA join)
|
||||
1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer (incremental, BKA join)
|
||||
SELECT City.Name, Country.Name, CountryLanguage.Language
|
||||
FROM City,Country,CountryLanguage
|
||||
WHERE City.Country=Country.Code AND
|
||||
|
|
@ -3518,7 +3518,7 @@ WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AN
|
|||
City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
|
||||
1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKA join)
|
||||
SELECT Name FROM City
|
||||
WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND
|
||||
City.Population > 100000;
|
||||
|
|
@ -3548,7 +3548,7 @@ WHERE City.Country=Country.Code AND
|
|||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
|
||||
1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKAH join)
|
||||
SELECT City.Name, Country.Name FROM City,Country
|
||||
WHERE City.Country=Country.Code AND
|
||||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
|
|
@ -3577,8 +3577,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND
|
|||
CountryLanguage.Percentage > 50;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where
|
||||
1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer
|
||||
1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer
|
||||
1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer (flat, BKAH join)
|
||||
1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer (flat, BKAH join)
|
||||
SELECT City.Name, Country.Name, CountryLanguage.Language
|
||||
FROM City,Country,CountryLanguage
|
||||
WHERE City.Country=Country.Code AND
|
||||
|
|
@ -3732,7 +3732,7 @@ WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AN
|
|||
City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
|
||||
1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKAH join)
|
||||
SELECT Name FROM City
|
||||
WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND
|
||||
City.Population > 100000;
|
||||
|
|
@ -3762,7 +3762,7 @@ WHERE City.Country=Country.Code AND
|
|||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
|
||||
1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKAH join)
|
||||
SELECT City.Name, Country.Name FROM City,Country
|
||||
WHERE City.Country=Country.Code AND
|
||||
Country.Name LIKE 'L%' AND City.Population > 100000;
|
||||
|
|
@ -3791,8 +3791,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND
|
|||
CountryLanguage.Percentage > 50;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where
|
||||
1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer
|
||||
1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer
|
||||
1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer (flat, BKAH join)
|
||||
1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer (incremental, BKAH join)
|
||||
SELECT City.Name, Country.Name, CountryLanguage.Language
|
||||
FROM City,Country,CountryLanguage
|
||||
WHERE City.Country=Country.Code AND
|
||||
|
|
@ -3946,7 +3946,7 @@ WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AN
|
|||
City.Population > 100000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
|
||||
1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer
|
||||
1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKAH join)
|
||||
SELECT Name FROM City
|
||||
WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND
|
||||
City.Population > 100000;
|
||||
|
|
@ -4031,7 +4031,7 @@ SELECT City.Name, Country.Name FROM City,Country
|
|||
WHERE City.Country=Country.Code AND City.Population > 3000000;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE City range Population,Country Population 4 NULL # Using index condition; Using MRR
|
||||
1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.City.Country # Using join buffer
|
||||
1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.City.Country # Using join buffer (flat, BKAH join)
|
||||
SELECT City.Name, Country.Name FROM City,Country
|
||||
WHERE City.Country=Country.Code AND City.Population > 3000000;
|
||||
Name Name
|
||||
|
|
@ -4320,15 +4320,15 @@ t1.metaid = t2.metaid AND t1.affiliateid = '2';
|
|||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t6 system PRIMARY NULL NULL NULL 1
|
||||
1 SIMPLE t1 ref t1_affiliateid,t1_metaid t1_affiliateid 4 const 1
|
||||
1 SIMPLE t4 ref PRIMARY,t4_formatclassid,t4_formats_idx t4_formats_idx 1 const 1 Using index condition; Using where; Using join buffer
|
||||
1 SIMPLE t5 eq_ref PRIMARY,t5_formattypeid PRIMARY 4 test.t4.formatclassid 1 Using where; Using join buffer
|
||||
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.metaid 1 Using join buffer
|
||||
1 SIMPLE t4 ref PRIMARY,t4_formatclassid,t4_formats_idx t4_formats_idx 1 const 1 Using index condition; Using where; Using join buffer (flat, BKA join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY,t5_formattypeid PRIMARY 4 test.t4.formatclassid 1 Using where; Using join buffer (incremental, BKA join)
|
||||
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.metaid 1 Using join buffer (incremental, BKA join)
|
||||
1 SIMPLE t7 ref PRIMARY PRIMARY 4 test.t1.metaid 1 Using index
|
||||
1 SIMPLE t3 ref t3_metaid,t3_formatid,t3_metaidformatid t3_metaid 4 test.t1.metaid 2 Using where; Using join buffer
|
||||
1 SIMPLE t8 eq_ref PRIMARY PRIMARY 4 test.t7.artistid 1 Using join buffer
|
||||
1 SIMPLE t9 index PRIMARY,t9_subgenreid,t9_metaid PRIMARY 8 NULL 2 Using where; Using index; Using join buffer
|
||||
1 SIMPLE t10 eq_ref PRIMARY,t10_genreid PRIMARY 4 test.t9.subgenreid 1 Using join buffer
|
||||
1 SIMPLE t11 eq_ref PRIMARY PRIMARY 4 test.t10.genreid 1 Using join buffer
|
||||
1 SIMPLE t3 ref t3_metaid,t3_formatid,t3_metaidformatid t3_metaid 4 test.t1.metaid 2 Using where; Using join buffer (flat, BKA join)
|
||||
1 SIMPLE t8 eq_ref PRIMARY PRIMARY 4 test.t7.artistid 1 Using join buffer (incremental, BKA join)
|
||||
1 SIMPLE t9 index PRIMARY,t9_subgenreid,t9_metaid PRIMARY 8 NULL 2 Using where; Using index; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t10 eq_ref PRIMARY,t10_genreid PRIMARY 4 test.t9.subgenreid 1 Using join buffer (incremental, BKA join)
|
||||
1 SIMPLE t11 eq_ref PRIMARY PRIMARY 4 test.t10.genreid 1 Using join buffer (incremental, BKA join)
|
||||
SELECT t1.uniquekey, t1.xml AS affiliateXml,
|
||||
t8.name AS artistName, t8.artistid,
|
||||
t11.name AS genreName, t11.genreid, t11.priority AS genrePriority,
|
||||
|
|
@ -4409,7 +4409,7 @@ FROM t1,t2,t3 WHERE a1=a2 AND b2=b3 AND MOD(c3,10)>7;
|
|||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 9 Using where
|
||||
1 SIMPLE t2 ref PRIMARY PRIMARY 4 test.t1.a1 1 Using index
|
||||
1 SIMPLE t3 ref idx idx 5 test.t2.b2 5 Using where; Using join buffer
|
||||
1 SIMPLE t3 ref idx idx 5 test.t2.b2 5 Using where; Using join buffer (flat, BKA join)
|
||||
SELECT a1<>a2, a1, a2, b2, b3, c3,
|
||||
SUBSTR(filler1,1,1) AS s1, SUBSTR(filler2,1,1) AS s2
|
||||
FROM t1,t2,t3 WHERE a1=a2 AND b2=b3 AND MOD(c3,10)>7;
|
||||
|
|
@ -4441,7 +4441,7 @@ set join_cache_level=8;
|
|||
EXPLAIN SELECT * FROM t1,t2 WHERE t1.a=t2.a AND t1.b >= 30;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL idx NULL NULL NULL 7 Using where
|
||||
1 SIMPLE t2 ref idx idx 5 test.t1.a 2 Using join buffer
|
||||
1 SIMPLE t2 ref idx idx 5 test.t1.a 2 Using join buffer (flat, BKAH join)
|
||||
SELECT * FROM t1,t2 WHERE t1.a=t2.a AND t1.b >= 30;
|
||||
a b a b
|
||||
7 40 7 10
|
||||
|
|
@ -4474,7 +4474,7 @@ EXPLAIN
|
|||
SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.a WHERE t2.b IS NULL;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
|
||||
1 SIMPLE t2 ref i_a i_a 4 test.t1.a 2 Using where; Not exists; Using join buffer
|
||||
1 SIMPLE t2 ref i_a i_a 4 test.t1.a 2 Using where; Not exists; Using join buffer (flat, BKA join)
|
||||
SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.a WHERE t2.b IS NULL;
|
||||
a a b
|
||||
3 NULL NULL
|
||||
|
|
@ -4501,7 +4501,7 @@ select t1.a, count(t2.p) as count
|
|||
from t1 left join t2 on t1.a=t2.a and t2.p % 2 = 1 group by t1.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 8 Using temporary; Using filesort
|
||||
1 SIMPLE t2 ref i_a i_a 5 test.t1.a 2 Using where; Using join buffer
|
||||
1 SIMPLE t2 ref i_a i_a 5 test.t1.a 2 Using where; Using join buffer (flat, BKA join)
|
||||
select t1.a, count(t2.p) as count
|
||||
from t1 left join t2 on t1.a=t2.a and t2.p % 2 = 1 group by t1.a;
|
||||
a count
|
||||
|
|
@ -4553,7 +4553,7 @@ a b a c
|
|||
explain select * from t1 left join t2 on t1.a=t2.a where t2.c=102 or t2.c is null;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
|
||||
select * from t1 left join t2 on t1.a=t2.a where t2.c=102 or t2.c is null;
|
||||
a b a c
|
||||
3 30 3 102
|
||||
|
|
@ -4576,7 +4576,7 @@ a b
|
|||
explain select * from t1 left join t2 on (1=0) where a=40;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join)
|
||||
select * from t1 left join t2 on (1=0) where a=40;
|
||||
a b
|
||||
40 NULL
|
||||
|
|
@ -4620,7 +4620,7 @@ set join_buffer_size=1024;
|
|||
EXPLAIN SELECT AVG(c) FROM t1,t2 WHERE t1.a=t2.b;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 2050 Using where
|
||||
1 SIMPLE t2 ref idx idx 5 test.t1.a 640 Using join buffer
|
||||
1 SIMPLE t2 ref idx idx 5 test.t1.a 640 Using join buffer (flat, BKA join)
|
||||
SELECT AVG(c) FROM t1,t2 WHERE t1.a=t2.b;
|
||||
AVG(c)
|
||||
5.0000
|
||||
|
|
@ -4660,8 +4660,8 @@ WHERE t1.a=t2.a AND t2.a=t3.a AND
|
|||
t1.b IS NULL AND t2.b IS NULL AND t3.b IS NULL;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 16384 Using where
|
||||
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where; Using join buffer
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where; Using join buffer
|
||||
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where; Using join buffer (flat, BKAH join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where; Using join buffer (flat, BKAH join)
|
||||
SELECT COUNT(*) FROM t1,t2,t3
|
||||
WHERE t1.a=t2.a AND t2.a=t3.a AND
|
||||
t1.b IS NULL AND t2.b IS NULL AND t3.b IS NULL;
|
||||
|
|
@ -4726,7 +4726,7 @@ WHERE t1.a=t2.a;
|
|||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 index PRIMARY PRIMARY 8 NULL 2 Using index
|
||||
1 SIMPLE t2 ref PRIMARY PRIMARY 8 test.t1.a 1 Using index
|
||||
1 SIMPLE t3 ref idx idx 16 test.t1.a,test.t2.b 2 Using join buffer
|
||||
1 SIMPLE t3 ref idx idx 16 test.t1.a,test.t2.b 2 Using join buffer (flat, BKA join)
|
||||
SELECT t1.a, t2.a, t3.a, t2.b, t3.b, t3.val
|
||||
FROM (t1,t2) LEFT JOIN t3 ON (t1.a=t3.a AND t2.b=t3.b)
|
||||
WHERE t1.a=t2.a;
|
||||
|
|
@ -4751,7 +4751,7 @@ WHERE t1.a=t2.a;
|
|||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 index PRIMARY PRIMARY 8 NULL 2 Using index
|
||||
1 SIMPLE t2 ref PRIMARY PRIMARY 8 test.t1.a 1 Using index
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 24 Using where; Using join buffer
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 24 Using where; Using join buffer (flat, BNL join)
|
||||
SELECT t1.a, t2.a, t3.a, t2.b, t3.b, t3.val
|
||||
FROM (t1,t2) LEFT JOIN t3 ON (t1.a=t3.a AND t2.b=t3.b)
|
||||
WHERE t1.a=t2.a;
|
||||
|
|
@ -4797,7 +4797,7 @@ explain select t2.f1, t2.f2, t2.f3 from t1,t2
|
|||
where t1.f1=t2.f1 and t2.f2 between t1.f1 and t2.f2;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ref f1 f1 4 test.t1.f1 3 Using index condition(BKA); Using join buffer
|
||||
1 SIMPLE t2 ref f1 f1 4 test.t1.f1 3 Using index condition(BKA); Using join buffer (flat, BKA join)
|
||||
set join_cache_level=6;
|
||||
select t2.f1, t2.f2, t2.f3 from t1,t2
|
||||
where t1.f1=t2.f1 and t2.f2 between t1.f1 and t1.f2 and t2.f2 + 1 >= t1.f1 + 1;
|
||||
|
|
@ -4810,7 +4810,7 @@ explain select t2.f1, t2.f2, t2.f3 from t1,t2
|
|||
where t1.f1=t2.f1 and t2.f2 between t1.f1 and t2.f2;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ref f1 f1 4 test.t1.f1 3 Using index condition(BKA); Using join buffer
|
||||
1 SIMPLE t2 ref f1 f1 4 test.t1.f1 3 Using index condition(BKA); Using join buffer (flat, BKA join)
|
||||
set join_cache_level=7;
|
||||
select t2.f1, t2.f2, t2.f3 from t1,t2
|
||||
where t1.f1=t2.f1 and t2.f2 between t1.f1 and t1.f2 and t2.f2 + 1 >= t1.f1 + 1;
|
||||
|
|
@ -4823,7 +4823,7 @@ explain select t2.f1, t2.f2, t2.f3 from t1,t2
|
|||
where t1.f1=t2.f1 and t2.f2 between t1.f1 and t2.f2;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ref f1 f1 4 test.t1.f1 3 Using index condition(BKA); Using where; Using join buffer
|
||||
1 SIMPLE t2 ref f1 f1 4 test.t1.f1 3 Using index condition(BKA); Using where; Using join buffer (flat, BKAH join)
|
||||
set join_cache_level=8;
|
||||
select t2.f1, t2.f2, t2.f3 from t1,t2
|
||||
where t1.f1=t2.f1 and t2.f2 between t1.f1 and t1.f2 and t2.f2 + 1 >= t1.f1 + 1;
|
||||
|
|
@ -4836,7 +4836,7 @@ explain select t2.f1, t2.f2, t2.f3 from t1,t2
|
|||
where t1.f1=t2.f1 and t2.f2 between t1.f1 and t2.f2;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ref f1 f1 4 test.t1.f1 3 Using index condition(BKA); Using where; Using join buffer
|
||||
1 SIMPLE t2 ref f1 f1 4 test.t1.f1 3 Using index condition(BKA); Using where; Using join buffer (flat, BKAH join)
|
||||
drop table t1,t2;
|
||||
set join_cache_level=default;
|
||||
#
|
||||
|
|
@ -4855,7 +4855,7 @@ select t1.id1, sum(t2.id2) from t1 join t2 on t1.id1=t2.id1
|
|||
where t1.d=3 group by t1.id1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ref idx1 idx1 5 const 4 Using where; Using index; Using temporary; Using filesort
|
||||
1 SIMPLE t2 ref idx2 idx2 5 test.t1.id1 2 Using join buffer
|
||||
1 SIMPLE t2 ref idx2 idx2 5 test.t1.id1 2 Using join buffer (flat, BKA join)
|
||||
select t1.id1, sum(t2.id2) from t1 join t2 on t1.id1=t2.id1
|
||||
where t1.d=3 group by t1.id1;
|
||||
id1 sum(t2.id2)
|
||||
|
|
@ -4867,7 +4867,7 @@ select t1.id1 from t1 join t2 on t1.id1=t2.id1
|
|||
where t1.d=3 and t2.id2 > 200 order by t1.id1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ref idx1 idx1 5 const 4 Using where; Using index; Using temporary; Using filesort
|
||||
1 SIMPLE t2 ref idx2 idx2 5 test.t1.id1 2 Using where; Using join buffer
|
||||
1 SIMPLE t2 ref idx2 idx2 5 test.t1.id1 2 Using where; Using join buffer (flat, BKA join)
|
||||
select t1.id1 from t1 join t2 on t1.id1=t2.id1
|
||||
where t1.d=3 and t2.id2 > 200 order by t1.id1;
|
||||
id1
|
||||
|
|
@ -4924,9 +4924,9 @@ select t1.a, t1.b, t1.c, t1.d, t2.e, t3.f, t4.g from t1,t2,t3,t4
|
|||
where t2.b=t1.b and t3.d=t1.d and t4.c=t1.c;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 7 Using where
|
||||
1 SIMPLE t2 ref idx idx 5 test.t1.b 1 Using join buffer
|
||||
1 SIMPLE t3 ref idx idx 5 test.t1.d 1 Using join buffer
|
||||
1 SIMPLE t4 ref idx idx 5 test.t1.c 1 Using join buffer
|
||||
1 SIMPLE t2 ref idx idx 5 test.t1.b 1 Using join buffer (flat, BKA join)
|
||||
1 SIMPLE t3 ref idx idx 5 test.t1.d 1 Using join buffer (incremental, BKA join)
|
||||
1 SIMPLE t4 ref idx idx 5 test.t1.c 1 Using join buffer (incremental, BKA join)
|
||||
select t1.a, t1.b, t1.c, t1.d, t2.e, t3.f, t4.g from t1,t2,t3,t4
|
||||
where t2.b=t1.b and t3.d=t1.d and t4.c=t1.c;
|
||||
a b c d e f g
|
||||
|
|
@ -4975,10 +4975,10 @@ WHERE t1.id1=t5.id1 AND t1.id2=t5.id2 and t4.id2=t1.id2 AND
|
|||
t5.enum2='Active' AND t3.id4=t2.id4 AND t2.id3=t1.id3 AND t3.text1<'D';
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 349 Using where
|
||||
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 8 test.t1.id3 1 Using where; Using join buffer
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 8 test.t2.id4 1 Using where; Using join buffer
|
||||
1 SIMPLE t4 eq_ref PRIMARY PRIMARY 8 test.t1.id2 1 Using join buffer
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 16 test.t1.id1,test.t1.id2 1 Using where; Using join buffer
|
||||
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 8 test.t1.id3 1 Using where; Using join buffer (flat, BKAH join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 8 test.t2.id4 1 Using where; Using join buffer (incremental, BKAH join)
|
||||
1 SIMPLE t4 eq_ref PRIMARY PRIMARY 8 test.t1.id2 1 Using join buffer (incremental, BKAH join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 16 test.t1.id1,test.t1.id2 1 Using where; Using join buffer (incremental, BKAH join)
|
||||
SELECT STRAIGHT_JOIN t1.id1, t1.num3, t3.text1, t3.id4, t2.id3, t4.dummy
|
||||
FROM t1 JOIN t2 JOIN t3 JOIN t4 JOIN t5
|
||||
WHERE t1.id1=t5.id1 AND t1.id2=t5.id2 and t4.id2=t1.id2 AND
|
||||
|
|
@ -5075,7 +5075,7 @@ FROM t1 STRAIGHT_JOIN t2
|
|||
ORDER BY t1.int_key;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 index NULL int_key 4 NULL 14 Using index
|
||||
1 SIMPLE t2 index NULL int_key 4 NULL 2 Using index; Using join buffer
|
||||
1 SIMPLE t2 index NULL int_key 4 NULL 2 Using index; Using join buffer (flat, BNL join)
|
||||
|
||||
DROP TABLE t1,t2;
|
||||
SET join_cache_level=default;
|
||||
|
|
@ -5109,7 +5109,7 @@ FROM t1 JOIN t2 ON t2.v
|
|||
ORDER BY t2.v;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where
|
||||
1 SIMPLE t1 index NULL PRIMARY 4 NULL 4 Using index; Using join buffer
|
||||
1 SIMPLE t1 index NULL PRIMARY 4 NULL 4 Using index; Using join buffer (flat, BNL join)
|
||||
|
||||
DROP TABLE t1,t2;
|
||||
#
|
||||
|
|
@ -5143,8 +5143,8 @@ insert into t3 values (1,1),(2,2);
|
|||
explain select t1.* from t1,t2,t3;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using join buffer
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using join buffer (flat, BNL join)
|
||||
select t1.* from t1,t2,t3;
|
||||
a b
|
||||
1 1
|
||||
|
|
@ -5159,8 +5159,8 @@ set join_cache_level=2;
|
|||
explain select t1.* from t1,t2,t3;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using join buffer
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using join buffer (incremental, BNL join)
|
||||
select t1.* from t1,t2,t3;
|
||||
a b
|
||||
1 1
|
||||
|
|
@ -5190,8 +5190,8 @@ EXPLAIN
|
|||
SELECT t3.a FROM t1,t2,t3 WHERE t1.a = t3.a AND t1.b = t3.b;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 5 Using join buffer
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 5 Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where; Using join buffer (incremental, BKA join)
|
||||
SELECT t3.a FROM t1,t2,t3 WHERE t1.a = t3.a AND t1.b = t3.b;
|
||||
a
|
||||
27
|
||||
|
|
@ -5237,7 +5237,7 @@ FROM (t2 JOIN t1) LEFT JOIN (t3 JOIN t4 ON t3.id = t4.carrier_id)
|
|||
ON t3.carrier = t1.carrier;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.carrier 1 Using where
|
||||
1 SIMPLE t4 ref carrier_id carrier_id 5 test.t3.id 2 Using index
|
||||
SET join_cache_level=default;
|
||||
|
|
@ -5253,7 +5253,7 @@ set join_cache_level = 5;
|
|||
explain SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t2 ref b b 5 test.t1.b 2 Using where; Using join buffer
|
||||
1 SIMPLE t2 ref b b 5 test.t1.b 2 Using where; Using join buffer (flat, BKA join)
|
||||
SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b;
|
||||
a
|
||||
NULL
|
||||
|
|
@ -5262,7 +5262,7 @@ set join_cache_level = 8;
|
|||
explain SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t2 ref b b 5 test.t1.b 2 Using where; Using join buffer
|
||||
1 SIMPLE t2 ref b b 5 test.t1.b 2 Using where; Using join buffer (flat, BKAH join)
|
||||
SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b;
|
||||
a
|
||||
NULL
|
||||
|
|
@ -5273,7 +5273,7 @@ set join_cache_level = 5;
|
|||
explain SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t2 ref b b 5 test.t1.b 2 Using where; Using join buffer
|
||||
1 SIMPLE t2 ref b b 5 test.t1.b 2 Using where; Using join buffer (flat, BKA join)
|
||||
SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b;
|
||||
a
|
||||
NULL
|
||||
|
|
@ -5287,7 +5287,7 @@ set join_cache_level = 5;
|
|||
explain SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t2 ref b b 103 test.t1.b 2 Using where; Using join buffer
|
||||
1 SIMPLE t2 ref b b 103 test.t1.b 2 Using where; Using join buffer (flat, BKA join)
|
||||
SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b;
|
||||
a
|
||||
NULL
|
||||
|
|
@ -5296,7 +5296,7 @@ set join_cache_level = 8;
|
|||
explain SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t2 ref b b 103 test.t1.b 2 Using where; Using join buffer
|
||||
1 SIMPLE t2 ref b b 103 test.t1.b 2 Using where; Using join buffer (flat, BKAH join)
|
||||
SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b;
|
||||
a
|
||||
NULL
|
||||
|
|
@ -5322,7 +5322,7 @@ SELECT t.a FROM t1 t, t1 s FORCE INDEX(idx)
|
|||
WHERE s.pk AND s.a >= t.pk AND s.b = t.c;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t ALL NULL NULL NULL NULL 2 Using where
|
||||
1 SIMPLE s ref idx idx 19 test.t.c 1 Using index condition(BKA); Using where; Using join buffer
|
||||
1 SIMPLE s ref idx idx 19 test.t.c 1 Using index condition(BKA); Using where; Using join buffer (flat, BKAH join)
|
||||
SELECT t.a FROM t1 t, t1 s FORCE INDEX(idx)
|
||||
WHERE s.pk AND s.a >= t.pk AND s.b = t.c;
|
||||
a
|
||||
|
|
@ -5345,8 +5345,8 @@ FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON t2.a) ON 0
|
|||
WHERE t1.a OR t3.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 4
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; Using join buffer
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; Using join buffer (incremental, BNL join)
|
||||
SELECT t1.a
|
||||
FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON t2.a) ON 0
|
||||
WHERE t1.a OR t3.a;
|
||||
|
|
@ -5359,9 +5359,9 @@ FROM t1 LEFT JOIN (t2 LEFT JOIN (t3 LEFT JOIN t4 ON 1) ON t2.a) ON 0
|
|||
WHERE t1.a OR t4.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 4
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; Using join buffer
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 0 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 0 Using where; Using join buffer (incremental, BNL join)
|
||||
SELECT t1.a
|
||||
FROM t1 LEFT JOIN (t2 LEFT JOIN (t3 LEFT JOIN t4 ON 1) ON t2.a) ON 0
|
||||
WHERE t1.a OR t4.a;
|
||||
|
|
|
|||
|
|
@ -229,7 +229,7 @@ t8
|
|||
ON t7.b=t8.b AND t6.b < 10;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b` from `test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t7`.`b` = `test`.`t8`.`b`) and (`test`.`t6`.`b` < 10))) where 1
|
||||
|
|
@ -544,7 +544,7 @@ t0.b=t1.b AND
|
|||
(t2.a >= 4 OR t2.c IS NULL);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
|
|
@ -639,7 +639,7 @@ t0.b=t1.b AND
|
|||
(t9.a=1);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
|
|
@ -647,7 +647,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
|
|||
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and ((`test`.`t5`.`b` = `test`.`t0`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`)))
|
||||
SELECT t9.a,t9.b
|
||||
|
|
@ -836,7 +836,7 @@ ON t3.a=1 AND t2.b=t4.b
|
|||
WHERE t1.a <= 2;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
Warnings:
|
||||
|
|
@ -850,7 +850,7 @@ LEFT JOIN
|
|||
ON t3.a=1 AND t3.b=t2.b AND t2.b=t4.b;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t2 ref idx_b idx_b 5 test.t3.b 2 100.00 Using where
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00
|
||||
Warnings:
|
||||
|
|
@ -906,7 +906,7 @@ t0.b=t1.b AND
|
|||
(t9.a=1);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
|
|
@ -914,7 +914,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
|
|||
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and ((`test`.`t5`.`b` = `test`.`t0`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`)))
|
||||
CREATE INDEX idx_b ON t4(b);
|
||||
|
|
@ -956,7 +956,7 @@ t0.b=t1.b AND
|
|||
(t9.a=1);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where
|
||||
|
|
@ -964,7 +964,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
|
|||
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and ((`test`.`t5`.`b` = `test`.`t0`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`)))
|
||||
CREATE INDEX idx_b ON t8(b);
|
||||
|
|
@ -1005,7 +1005,7 @@ t0.b=t1.b AND
|
|||
(t9.a=1);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where
|
||||
|
|
@ -1013,7 +1013,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
|
|||
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)) and (`test`.`t5`.`b` is not null)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and ((`test`.`t5`.`b` = `test`.`t0`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`)))
|
||||
CREATE INDEX idx_b ON t1(b);
|
||||
|
|
@ -1063,7 +1063,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
|
|||
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)) and (`test`.`t5`.`b` is not null)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and ((`test`.`t5`.`b` = `test`.`t0`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`)))
|
||||
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
|
||||
|
|
|
|||
|
|
@ -80,8 +80,8 @@ ON t2.b=t4.b
|
|||
WHERE t3.a=1 OR t3.c IS NULL;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((`test`.`t4`.`b` = `test`.`t2`.`b`)) where ((`test`.`t3`.`a` = 1) or isnull(`test`.`t3`.`c`))
|
||||
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
|
||||
|
|
@ -156,9 +156,9 @@ ON t2.b=t4.b
|
|||
WHERE t3.a>1 OR t3.c IS NULL;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using join buffer
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (incremental, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b` from `test`.`t2` left join (`test`.`t3` join `test`.`t4` join `test`.`t5`) on((`test`.`t4`.`b` = `test`.`t2`.`b`)) where ((`test`.`t3`.`a` > 1) or isnull(`test`.`t3`.`c`))
|
||||
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
|
||||
|
|
@ -186,9 +186,9 @@ WHERE (t3.a>1 OR t3.c IS NULL) AND
|
|||
(t5.a<3 OR t5.c IS NULL);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b` from `test`.`t2` left join (`test`.`t3` join `test`.`t4` join `test`.`t5`) on((`test`.`t4`.`b` = `test`.`t2`.`b`)) where (((`test`.`t3`.`a` > 1) or isnull(`test`.`t3`.`c`)) and ((`test`.`t5`.`a` < 3) or isnull(`test`.`t5`.`c`)))
|
||||
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
|
||||
|
|
@ -236,8 +236,8 @@ t8
|
|||
ON t7.b=t8.b AND t6.b < 10;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using join buffer
|
||||
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b` from `test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t7`.`b` = `test`.`t8`.`b`) and (`test`.`t6`.`b` < 10))) where 1
|
||||
SELECT t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
|
||||
|
|
@ -551,14 +551,14 @@ t0.b=t1.b AND
|
|||
(t2.a >= 4 OR t2.c IS NULL);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using join buffer
|
||||
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and ((`test`.`t5`.`b` = `test`.`t0`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) where ((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)))
|
||||
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
|
||||
|
|
@ -646,15 +646,15 @@ t0.b=t1.b AND
|
|||
(t9.a=1);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and ((`test`.`t5`.`b` = `test`.`t0`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`)))
|
||||
SELECT t9.a,t9.b
|
||||
|
|
@ -843,9 +843,9 @@ ON t3.a=1 AND t2.b=t4.b
|
|||
WHERE t1.a <= 2;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using join buffer
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t1` join `test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) where (`test`.`t1`.`a` <= 2)
|
||||
CREATE INDEX idx_b ON t2(b);
|
||||
|
|
@ -857,9 +857,9 @@ LEFT JOIN
|
|||
ON t3.a=1 AND t3.b=t2.b AND t2.b=t4.b;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using join buffer
|
||||
1 SIMPLE t2 ref idx_b idx_b 5 test.t3.b 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t2 ref idx_b idx_b 5 test.t3.b 2 100.00 Using where; Using join buffer (incremental, BKA join)
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (incremental, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t3` join `test`.`t4` left join (`test`.`t1` join `test`.`t2`) on((((`test`.`t3`.`a` = 1) and (`test`.`t3`.`b` = `test`.`t2`.`b`) and (`test`.`t2`.`b` = `test`.`t4`.`b`)) and (`test`.`t3`.`b` is not null))) where 1
|
||||
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
|
||||
|
|
@ -913,15 +913,15 @@ t0.b=t1.b AND
|
|||
(t9.a=1);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and ((`test`.`t5`.`b` = `test`.`t0`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`)))
|
||||
CREATE INDEX idx_b ON t4(b);
|
||||
|
|
@ -963,15 +963,15 @@ t0.b=t1.b AND
|
|||
(t9.a=1);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BKA join)
|
||||
1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and ((`test`.`t5`.`b` = `test`.`t0`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`)))
|
||||
CREATE INDEX idx_b ON t8(b);
|
||||
|
|
@ -1012,15 +1012,15 @@ t0.b=t1.b AND
|
|||
(t9.a=1);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BKA join)
|
||||
1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BKA join)
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)) and (`test`.`t5`.`b` is not null)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and ((`test`.`t5`.`b` = `test`.`t0`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`)))
|
||||
CREATE INDEX idx_b ON t1(b);
|
||||
|
|
@ -1062,15 +1062,15 @@ t0.b=t1.b AND
|
|||
(t9.a=1);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t0 ref idx_a idx_a 5 const 1 100.00 Using where
|
||||
1 SIMPLE t1 ref idx_b idx_b 5 test.t0.b 2 100.00 Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t1 ref idx_b idx_b 5 test.t0.b 2 100.00 Using join buffer (flat, BKA join)
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BKA join)
|
||||
1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BKA join)
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)) and (`test`.`t5`.`b` is not null)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and ((`test`.`t5`.`b` = `test`.`t0`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`)))
|
||||
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
|
||||
|
|
@ -1324,8 +1324,8 @@ c11 c21 c31
|
|||
EXPLAIN SELECT * FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON c21=c31) ON c11=c21;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; Using join buffer
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; Using join buffer (incremental, BNL join)
|
||||
DROP TABLE t1,t2,t3;
|
||||
CREATE TABLE t1 (goods int(12) NOT NULL, price varchar(128) NOT NULL);
|
||||
INSERT INTO t1 VALUES (23, 2340), (26, 9900);
|
||||
|
|
@ -1452,27 +1452,27 @@ explain select * from t4 join
|
|||
t2 left join (t3 join t5 on t5.a=t3.b) on t3.a=t2.b where t4.a<=>t3.b;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL X
|
||||
1 SIMPLE t3 ref a a 5 test.t2.b X Using where; Using join buffer
|
||||
1 SIMPLE t5 ref a a 5 test.t3.b X Using join buffer
|
||||
1 SIMPLE t4 ref a a 5 test.t3.b X Using index condition(BKA); Using join buffer
|
||||
1 SIMPLE t3 ref a a 5 test.t2.b X Using where; Using join buffer (flat, BKA join)
|
||||
1 SIMPLE t5 ref a a 5 test.t3.b X Using join buffer (incremental, BKA join)
|
||||
1 SIMPLE t4 ref a a 5 test.t3.b X Using index condition(BKA); Using join buffer (incremental, BKA join)
|
||||
explain select * from (t4 join t6 on t6.a=t4.b) right join t3 on t4.a=t3.b
|
||||
join t2 left join (t5 join t7 on t7.a=t5.b) on t5.a=t2.b where t3.a<=>t2.b;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL X
|
||||
1 SIMPLE t3 ref a a 5 test.t2.b X Using index condition(BKA); Using join buffer
|
||||
1 SIMPLE t4 ref a a 5 test.t3.b X Using where; Using join buffer
|
||||
1 SIMPLE t6 ref a a 5 test.t4.b X Using join buffer
|
||||
1 SIMPLE t5 ref a a 5 test.t2.b X Using where; Using join buffer
|
||||
1 SIMPLE t7 ref a a 5 test.t5.b X Using join buffer
|
||||
1 SIMPLE t3 ref a a 5 test.t2.b X Using index condition(BKA); Using join buffer (flat, BKA join)
|
||||
1 SIMPLE t4 ref a a 5 test.t3.b X Using where; Using join buffer (incremental, BKA join)
|
||||
1 SIMPLE t6 ref a a 5 test.t4.b X Using join buffer (incremental, BKA join)
|
||||
1 SIMPLE t5 ref a a 5 test.t2.b X Using where; Using join buffer (incremental, BKA join)
|
||||
1 SIMPLE t7 ref a a 5 test.t5.b X Using join buffer (incremental, BKA join)
|
||||
explain select * from t2 left join
|
||||
(t3 left join (t4 join t6 on t6.a=t4.b) on t4.a=t3.b
|
||||
join t5 on t5.a=t3.b) on t3.a=t2.b;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL X
|
||||
1 SIMPLE t3 ref a a 5 test.t2.b X Using where; Using join buffer
|
||||
1 SIMPLE t4 ref a a 5 test.t3.b X Using where; Using join buffer
|
||||
1 SIMPLE t6 ref a a 5 test.t4.b X Using join buffer
|
||||
1 SIMPLE t5 ref a a 5 test.t3.b X Using join buffer
|
||||
1 SIMPLE t3 ref a a 5 test.t2.b X Using where; Using join buffer (flat, BKA join)
|
||||
1 SIMPLE t4 ref a a 5 test.t3.b X Using where; Using join buffer (incremental, BKA join)
|
||||
1 SIMPLE t6 ref a a 5 test.t4.b X Using join buffer (incremental, BKA join)
|
||||
1 SIMPLE t5 ref a a 5 test.t3.b X Using join buffer (incremental, BKA join)
|
||||
drop table t0, t1, t2, t3, t4, t5, t6, t7;
|
||||
create table t1 (a int);
|
||||
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
||||
|
|
@ -1485,8 +1485,8 @@ explain select * from t1 left join
|
|||
on (t1.a = t2.a);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 10
|
||||
1 SIMPLE t2 ref a a 5 test.t1.a 1 Using where; Using join buffer
|
||||
1 SIMPLE t3 ref a a 5 test.t2.a 1 Using where; Using join buffer
|
||||
1 SIMPLE t2 ref a a 5 test.t1.a 1 Using where; Using join buffer (flat, BKA join)
|
||||
1 SIMPLE t3 ref a a 5 test.t2.a 1 Using where; Using join buffer (incremental, BKA join)
|
||||
drop table t1, t2, t3;
|
||||
CREATE TABLE t1 (id int NOT NULL PRIMARY KEY, type varchar(10));
|
||||
CREATE TABLE t2 (pid int NOT NULL PRIMARY KEY, type varchar(10));
|
||||
|
|
@ -1737,7 +1737,7 @@ LEFT JOIN
|
|||
ON t4.carrier = t1.carrier;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 index package_id package_id 5 NULL 45 Using where; Using index
|
||||
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.package_id 1 Using join buffer
|
||||
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.package_id 1 Using join buffer (flat, BKA join)
|
||||
1 SIMPLE t4 eq_ref PRIMARY,id PRIMARY 2 test.t1.carrier 1 Using where
|
||||
1 SIMPLE t5 ref carrier_id carrier_id 5 test.t4.id 22 Using index
|
||||
1 SIMPLE t3 ref package_id package_id 5 test.t1.id 1 Using where; Using index
|
||||
|
|
@ -1773,9 +1773,9 @@ ON t6.b >= 2 AND t5.b=t7.b AND
|
|||
(t8.a > 0 OR t8.c IS NULL);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t5 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t7 ref b_i b_i 5 test.t5.b 2 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL b_i NULL NULL NULL 3 Using where; Using join buffer
|
||||
1 SIMPLE t8 ref b_i b_i 5 test.t7.b 2 Using where; Using join buffer
|
||||
1 SIMPLE t7 ref b_i b_i 5 test.t5.b 2 Using where; Using join buffer (flat, BKA join)
|
||||
1 SIMPLE t6 ALL b_i NULL NULL NULL 3 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t8 ref b_i b_i 5 test.t7.b 2 Using where; Using join buffer (incremental, BKA join)
|
||||
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
|
||||
FROM t5
|
||||
LEFT JOIN
|
||||
|
|
@ -1808,9 +1808,9 @@ FROM t5 LEFT JOIN
|
|||
ON (t5.b=t8.b);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t5 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 1 Using join buffer
|
||||
1 SIMPLE t7 const PRIMARY PRIMARY 4 const 1 Using join buffer
|
||||
1 SIMPLE t8 ALL b_i NULL NULL NULL 1 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 1 Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 const PRIMARY PRIMARY 4 const 1 Using join buffer (incremental, BKA join)
|
||||
1 SIMPLE t8 ALL b_i NULL NULL NULL 1 Using where; Using join buffer (incremental, BNL join)
|
||||
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
|
||||
FROM t5 LEFT JOIN
|
||||
(t6 LEFT JOIN t7 ON t7.a=1, t8)
|
||||
|
|
@ -1825,9 +1825,9 @@ FROM t5 LEFT JOIN
|
|||
ON (t5.b=t8.b);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t5 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 1 Using join buffer
|
||||
1 SIMPLE t7 ref b_i b_i 5 const 0 Using join buffer
|
||||
1 SIMPLE t8 ALL b_i NULL NULL NULL 1 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 1 Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 ref b_i b_i 5 const 0 Using join buffer (incremental, BKA join)
|
||||
1 SIMPLE t8 ALL b_i NULL NULL NULL 1 Using where; Using join buffer (incremental, BNL join)
|
||||
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
|
||||
FROM t5 LEFT JOIN
|
||||
(t6 LEFT JOIN t7 ON t7.b=2, t8)
|
||||
|
|
@ -1842,9 +1842,9 @@ FROM t5 LEFT JOIN
|
|||
ON (t5.b=t8.b);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t5 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t8 ALL b_i NULL NULL NULL 1 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 1 Using join buffer
|
||||
1 SIMPLE t7 const PRIMARY PRIMARY 4 const 1 Using join buffer
|
||||
1 SIMPLE t8 ALL b_i NULL NULL NULL 1 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 1 Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t7 const PRIMARY PRIMARY 4 const 1 Using join buffer (incremental, BKA join)
|
||||
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
|
||||
FROM t5 LEFT JOIN
|
||||
(t8, t6 LEFT JOIN t7 ON t7.a=1)
|
||||
|
|
|
|||
|
|
@ -102,7 +102,7 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
explain select t1.*,t2.* from t1 left join t2 on t1.a=t2.a where isnull(t2.a)=1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 7
|
||||
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 8 test.t1.a 1 Using where; Using join buffer
|
||||
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 8 test.t1.a 1 Using where; Using join buffer (flat, BKA join)
|
||||
select t1.*,t2.*,t3.a from t1 left join t2 on (t1.a=t2.a) left join t1 as t3 on (t2.a=t3.a);
|
||||
grp a c id a c d a
|
||||
1 1 a 1 1 a 1 1
|
||||
|
|
@ -319,11 +319,11 @@ Lilliana Angelovska NULL NULL
|
|||
explain select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner) where t2.id is null;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Not exists; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Not exists; Using join buffer (flat, BNL join)
|
||||
explain select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner) where t2.name is null;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
|
||||
select count(*) from t1 left join t2 on (t1.id = t2.owner);
|
||||
count(*)
|
||||
4
|
||||
|
|
@ -339,11 +339,11 @@ Lilliana Angelovska NULL NULL
|
|||
explain select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner) where t2.id is null;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Not exists; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Not exists; Using join buffer (flat, BNL join)
|
||||
explain select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner) where t2.name is null;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
|
||||
select count(*) from t2 right join t1 on (t1.id = t2.owner);
|
||||
count(*)
|
||||
4
|
||||
|
|
@ -695,8 +695,8 @@ a1 a2 b1 b2 c1 c2
|
|||
explain select * from t1 left join t2 on b1 = a1 left join t3 on c1 = a1 and b1 is null;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (incremental, BNL join)
|
||||
drop table t1, t2, t3;
|
||||
create table t1 (
|
||||
a int(11),
|
||||
|
|
@ -745,13 +745,13 @@ explain select s.*, '*', m.*, (s.match_1_h - m.home) UUX from
|
|||
order by m.match_id desc;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE s ALL NULL NULL NULL NULL 10 Using temporary; Using filesort
|
||||
1 SIMPLE m const match_id,match_id_2 match_id 1 const 1 Using join buffer
|
||||
1 SIMPLE m const match_id,match_id_2 match_id 1 const 1 Using join buffer (flat, BKA join)
|
||||
explain select s.*, '*', m.*, (s.match_1_h - m.home) UUX from
|
||||
(t2 s left join t1 m on m.match_id = 1)
|
||||
order by UUX desc;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE s ALL NULL NULL NULL NULL 10 Using temporary; Using filesort
|
||||
1 SIMPLE m const match_id,match_id_2 match_id 1 const 1 Using join buffer
|
||||
1 SIMPLE m const match_id,match_id_2 match_id 1 const 1 Using join buffer (flat, BKA join)
|
||||
select s.*, '*', m.*, (s.match_1_h - m.home) UUX from
|
||||
(t2 s left join t1 m on m.match_id = 1)
|
||||
order by UUX desc;
|
||||
|
|
@ -771,7 +771,7 @@ t2 s straight_join t1 m where m.match_id = 1
|
|||
order by UUX desc;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE s ALL NULL NULL NULL NULL 10 Using temporary; Using filesort
|
||||
1 SIMPLE m const match_id,match_id_2 match_id 1 const 1 Using join buffer
|
||||
1 SIMPLE m const match_id,match_id_2 match_id 1 const 1 Using join buffer (flat, BKA join)
|
||||
select s.*, '*', m.*, (s.match_1_h - m.home) UUX from
|
||||
t2 s straight_join t1 m where m.match_id = 1
|
||||
order by UUX desc;
|
||||
|
|
@ -1134,15 +1134,15 @@ a b a b
|
|||
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a = t2.a OR t1.a = t2.b;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 4 Using where
|
||||
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 Using join buffer
|
||||
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 Using join buffer (flat, BKA join)
|
||||
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a IN(t2.a, t2.b);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 4 Using where
|
||||
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 Using join buffer
|
||||
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 Using join buffer (flat, BKA join)
|
||||
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a > IF(t1.a = t2.b-2, t2.b, t2.b-1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 4 Using where
|
||||
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 Using join buffer
|
||||
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 Using join buffer (flat, BKA join)
|
||||
DROP TABLE t1,t2;
|
||||
DROP VIEW IF EXISTS v1,v2;
|
||||
DROP TABLE IF EXISTS t1,t2;
|
||||
|
|
@ -1231,7 +1231,7 @@ EXPLAIN
|
|||
SELECT t1.id, a FROM t1 LEFT JOIN t2 ON t1.id=t2.id WHERE t2.b IS NULL;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
|
||||
1 SIMPLE t2 ref idx idx 4 test.t1.id 2 Using where; Not exists; Using join buffer
|
||||
1 SIMPLE t2 ref idx idx 4 test.t1.id 2 Using where; Not exists; Using join buffer (flat, BKA join)
|
||||
flush status;
|
||||
SELECT t1.id, a FROM t1 LEFT JOIN t2 ON t1.id=t2.id WHERE t2.b IS NULL;
|
||||
id a
|
||||
|
|
|
|||
|
|
@ -36,7 +36,7 @@ a a a a
|
|||
explain select t1.*,t2.* from t1,t1 as t2 where t1.A=t2.B;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL a NULL NULL NULL 5
|
||||
1 SIMPLE t2 ALL b NULL NULL NULL 5 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL b NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join)
|
||||
select t1.*,t2.* from t1,t1 as t2 where t1.A=t2.B order by binary t1.a,t2.a;
|
||||
a b a b
|
||||
A B a a
|
||||
|
|
|
|||
|
|
@ -346,11 +346,11 @@ t1 1 c_2 2 a A 5 NULL NULL BTREE
|
|||
explain select * from t1,t2 where t1.a=t2.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL a NULL NULL NULL 2
|
||||
1 SIMPLE t1 ALL a NULL NULL NULL 5 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL a NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join)
|
||||
explain select * from t1,t2 force index(a) where t1.a=t2.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL a NULL NULL NULL 2
|
||||
1 SIMPLE t1 ALL a NULL NULL NULL 5 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL a NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join)
|
||||
explain select * from t1 force index(a),t2 force index(a) where t1.a=t2.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL a NULL NULL NULL 2
|
||||
|
|
@ -362,7 +362,7 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
explain select * from t1,t2 force index(c) where t1.a=t2.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t1 ALL a NULL NULL NULL 5 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL a NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join)
|
||||
explain select * from t1 where a=0 or a=2;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL a NULL NULL NULL 5 Using where
|
||||
|
|
|
|||
|
|
@ -1608,18 +1608,18 @@ EXPLAIN
|
|||
SELECT * FROM t1 FORCE INDEX FOR ORDER BY (a), t2 WHERE t1.a < 2 ORDER BY t1.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 range a a 5 NULL 2 Using index condition; Using MRR; Using temporary; Using filesort
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 10 Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
|
||||
# should have "using filesort"
|
||||
EXPLAIN
|
||||
SELECT * FROM t1 USE INDEX FOR ORDER BY (a), t2 WHERE t1.a < 2 ORDER BY t1.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 range a a 5 NULL 2 Using index condition; Using MRR; Using temporary; Using filesort
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 10 Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
|
||||
# should have "using filesort"
|
||||
EXPLAIN
|
||||
SELECT * FROM t1 FORCE INDEX FOR JOIN (a), t2 WHERE t1.a < 2 ORDER BY t1.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 range a a 5 NULL 2 Using index condition; Using MRR; Using temporary; Using filesort
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 10 Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
|
||||
DROP TABLE t1, t2;
|
||||
End of 5.1 tests
|
||||
|
|
|
|||
|
|
@ -1429,7 +1429,7 @@ companynr companynr
|
|||
explain select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t4 index NULL PRIMARY 1 NULL 12 Using index; Using temporary
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join)
|
||||
select t2.fld1,t2.companynr,fld3,period from t3,t2 where t2.fld1 = 38208 and t2.fld1=t3.t2nr and period = 1008 or t2.fld1 = 38008 and t2.fld1 =t3.t2nr and period = 1008;
|
||||
fld1 companynr fld3 period
|
||||
038008 37 reporters 1008
|
||||
|
|
|
|||
|
|
@ -221,27 +221,27 @@ update t1 set y=x;
|
|||
explain select * from t1, t1 t2 where t1.y = 8 and t2.x between 7 and t1.y+0;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ref y y 5 const 1
|
||||
1 SIMPLE t2 range x x 5 NULL 2 Using index condition; Using MRR; Using join buffer
|
||||
1 SIMPLE t2 range x x 5 NULL 2 Using index condition; Using MRR; Using join buffer (flat, BNL join)
|
||||
explain select * from t1, t1 t2 where t1.y = 8 and t2.x >= 7 and t2.x <= t1.y+0;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ref y y 5 const 1
|
||||
1 SIMPLE t2 range x x 5 NULL 2 Using index condition; Using MRR; Using join buffer
|
||||
1 SIMPLE t2 range x x 5 NULL 2 Using index condition; Using MRR; Using join buffer (flat, BNL join)
|
||||
explain select * from t1, t1 t2 where t1.y = 2 and t2.x between t1.y-1 and t1.y+1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ref y y 5 const 1
|
||||
1 SIMPLE t2 range x x 5 NULL 3 Using index condition; Using MRR; Using join buffer
|
||||
1 SIMPLE t2 range x x 5 NULL 3 Using index condition; Using MRR; Using join buffer (flat, BNL join)
|
||||
explain select * from t1, t1 t2 where t1.y = 2 and t2.x >= t1.y-1 and t2.x <= t1.y+1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ref y y 5 const 1
|
||||
1 SIMPLE t2 range x x 5 NULL 3 Using index condition; Using MRR; Using join buffer
|
||||
1 SIMPLE t2 range x x 5 NULL 3 Using index condition; Using MRR; Using join buffer (flat, BNL join)
|
||||
explain select * from t1, t1 t2 where t1.y = 2 and t2.x between 0 and t1.y;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ref y y 5 const 1
|
||||
1 SIMPLE t2 range x x 5 NULL 2 Using index condition; Using MRR; Using join buffer
|
||||
1 SIMPLE t2 range x x 5 NULL 2 Using index condition; Using MRR; Using join buffer (flat, BNL join)
|
||||
explain select * from t1, t1 t2 where t1.y = 2 and t2.x >= 0 and t2.x <= t1.y;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ref y y 5 const 1
|
||||
1 SIMPLE t2 range x x 5 NULL 2 Using index condition; Using MRR; Using join buffer
|
||||
1 SIMPLE t2 range x x 5 NULL 2 Using index condition; Using MRR; Using join buffer (flat, BNL join)
|
||||
explain select count(*) from t1 where x in (1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ref x x 5 const 1 Using index
|
||||
|
|
@ -256,12 +256,12 @@ INSERT INTO t2 VALUES (0),(0),(1),(1),(2),(2);
|
|||
explain select * from t1, t2 where (t1.key1 <t2.keya + 1) and t2.keya=3;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ref j1 j1 4 const 1 Using index
|
||||
1 SIMPLE t1 index i1 i1 4 NULL 7 Using where; Using index; Using join buffer
|
||||
1 SIMPLE t1 index i1 i1 4 NULL 7 Using where; Using index; Using join buffer (flat, BNL join)
|
||||
explain select * from t1 force index(i1), t2 force index(j1) where
|
||||
(t1.key1 <t2.keya + 1) and t2.keya=3;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ref j1 j1 4 const 1 Using index
|
||||
1 SIMPLE t1 index i1 i1 4 NULL 7 Using where; Using index; Using join buffer
|
||||
1 SIMPLE t1 index i1 i1 4 NULL 7 Using where; Using index; Using join buffer (flat, BNL join)
|
||||
DROP TABLE t1,t2;
|
||||
CREATE TABLE t1 (
|
||||
a int(11) default NULL,
|
||||
|
|
|
|||
|
|
@ -377,7 +377,7 @@ a b a b c
|
|||
EXPLAIN EXTENDED SELECT * FROM t1,t2 WHERE (t1.a-1,t1.b)=(t2.a-1,t2.b+1);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t1 index NULL PRIMARY 8 NULL 6 100.00 Using index
|
||||
1 SIMPLE t2 index NULL PRIMARY 12 NULL 7 100.00 Using where; Using index; Using join buffer
|
||||
1 SIMPLE t2 index NULL PRIMARY 12 NULL 7 100.00 Using where; Using index; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`c` AS `c` from `test`.`t1` join `test`.`t2` where (((`test`.`t1`.`a` - 1) = (`test`.`t2`.`a` - 1)) and (`test`.`t1`.`b` = (`test`.`t2`.`b` + 1)))
|
||||
SELECT * FROM t1,t2 WHERE (t1.a-1,t1.b)=(t2.a-1,t2.b+1);
|
||||
|
|
|
|||
|
|
@ -1431,7 +1431,7 @@ companynr companynr
|
|||
explain select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t4 index NULL PRIMARY 1 NULL 12 Using index; Using temporary
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join)
|
||||
select t2.fld1,t2.companynr,fld3,period from t3,t2 where t2.fld1 = 38208 and t2.fld1=t3.t2nr and period = 1008 or t2.fld1 = 38008 and t2.fld1 =t3.t2nr and period = 1008;
|
||||
fld1 companynr fld3 period
|
||||
038008 37 reporters 1008
|
||||
|
|
@ -2363,7 +2363,7 @@ insert into t2 values (1,3), (2,3), (3,4), (4,4);
|
|||
explain select * from t1 left join t2 on a=c where d in (4);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ref c,d d 5 const 2
|
||||
1 SIMPLE t1 ALL a NULL NULL NULL 4 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL a NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join)
|
||||
select * from t1 left join t2 on a=c where d in (4);
|
||||
a b c d
|
||||
3 2 3 4
|
||||
|
|
@ -2371,7 +2371,7 @@ a b c d
|
|||
explain select * from t1 left join t2 on a=c where d = 4;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ref c,d d 5 const 2
|
||||
1 SIMPLE t1 ALL a NULL NULL NULL 4 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL a NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join)
|
||||
select * from t1 left join t2 on a=c where d = 4;
|
||||
a b c d
|
||||
3 2 3 4
|
||||
|
|
@ -2717,7 +2717,7 @@ where (t1.c=t2.a or (t1.c=t3.a and t2.a=t3.b)) and t1.b=556476786 and
|
|||
t2.b like '%%' order by t2.b limit 0,1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ref b,c b 5 const 1 Using temporary; Using filesort
|
||||
1 SIMPLE t3 index PRIMARY,a,b PRIMARY 8 NULL 2 Using index; Using join buffer
|
||||
1 SIMPLE t3 index PRIMARY,a,b PRIMARY 8 NULL 2 Using index; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 2 Range checked for each record (index map: 0x1)
|
||||
DROP TABLE t1,t2,t3;
|
||||
CREATE TABLE t1 (a int, INDEX idx(a));
|
||||
|
|
@ -2738,7 +2738,7 @@ ALTER TABLE t1 ENABLE KEYS;
|
|||
EXPLAIN SELECT STRAIGHT_JOIN SQL_NO_CACHE COUNT(*) FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 index b b 5 NULL 2 Using index
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
|
||||
SELECT STRAIGHT_JOIN SQL_NO_CACHE * FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL;
|
||||
a b a b
|
||||
1 NULL 1 1
|
||||
|
|
@ -2748,7 +2748,7 @@ a b a b
|
|||
EXPLAIN SELECT STRAIGHT_JOIN SQL_NO_CACHE COUNT(*) FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 index b b 5 NULL 2 Using index
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
|
||||
SELECT STRAIGHT_JOIN SQL_NO_CACHE * FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL;
|
||||
a b a b
|
||||
1 NULL 1 1
|
||||
|
|
@ -2910,11 +2910,11 @@ a
|
|||
EXPLAIN SELECT t1.a FROM t1 STRAIGHT_JOIN t2 ON t1.a=t2.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
|
||||
EXPLAIN SELECT t1.a FROM t1 INNER JOIN t2 ON t1.a=t2.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join)
|
||||
DROP TABLE t1,t2;
|
||||
select x'10' + 0, X'10' + 0, b'10' + 0, B'10' + 0;
|
||||
x'10' + 0 X'10' + 0 b'10' + 0 B'10' + 0
|
||||
|
|
|
|||
|
|
@ -611,15 +611,15 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
explain select * from t3 as t1,t3 where t1.period=t3.period order by t3.period;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL period NULL NULL NULL 41810 Using temporary; Using filesort
|
||||
1 SIMPLE t3 ref period period 4 test.t1.period 4181 Using join buffer
|
||||
1 SIMPLE t3 ref period period 4 test.t1.period 4181 Using join buffer (flat, BKA join)
|
||||
explain select * from t3 as t1,t3 where t1.period=t3.period order by t3.period limit 10;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t3 ALL period NULL NULL NULL 41810 Using temporary; Using filesort
|
||||
1 SIMPLE t1 ref period period 4 test.t3.period 4181 Using join buffer
|
||||
1 SIMPLE t1 ref period period 4 test.t3.period 4181 Using join buffer (flat, BKA join)
|
||||
explain select * from t3 as t1,t3 where t1.period=t3.period order by t1.period limit 10;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL period NULL NULL NULL 41810 Using temporary; Using filesort
|
||||
1 SIMPLE t3 ref period period 4 test.t1.period 4181 Using join buffer
|
||||
1 SIMPLE t3 ref period period 4 test.t1.period 4181 Using join buffer (flat, BKA join)
|
||||
select period from t1;
|
||||
period
|
||||
9410
|
||||
|
|
@ -1366,11 +1366,11 @@ count(*)
|
|||
explain select t2.companynr,companyname from t2 left join t4 using (companynr) where t4.companynr is null;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1200
|
||||
1 SIMPLE t4 eq_ref PRIMARY PRIMARY 1 test.t2.companynr 1 Using where; Not exists; Using join buffer
|
||||
1 SIMPLE t4 eq_ref PRIMARY PRIMARY 1 test.t2.companynr 1 Using where; Not exists; Using join buffer (flat, BKA join)
|
||||
explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr is null;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1200 Using where; Not exists; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1200 Using where; Not exists; Using join buffer (flat, BNL join)
|
||||
select companynr,companyname from t2 left join t4 using (companynr) where companynr is null;
|
||||
companynr companyname
|
||||
select count(*) from t2 left join t4 using (companynr) where companynr is not null;
|
||||
|
|
@ -1386,51 +1386,51 @@ delete from t2 where fld1=999999;
|
|||
explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where
|
||||
1 SIMPLE t4 eq_ref PRIMARY PRIMARY 1 test.t2.companynr 1 Using join buffer
|
||||
1 SIMPLE t4 eq_ref PRIMARY PRIMARY 1 test.t2.companynr 1 Using join buffer (flat, BKA join)
|
||||
explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 or t2.companynr < 0;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where
|
||||
1 SIMPLE t4 eq_ref PRIMARY PRIMARY 1 test.t2.companynr 1 Using join buffer
|
||||
1 SIMPLE t4 eq_ref PRIMARY PRIMARY 1 test.t2.companynr 1 Using join buffer (flat, BKA join)
|
||||
explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 and t4.companynr > 0;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where
|
||||
1 SIMPLE t4 eq_ref PRIMARY PRIMARY 1 test.t2.companynr 1 Using join buffer
|
||||
1 SIMPLE t4 eq_ref PRIMARY PRIMARY 1 test.t2.companynr 1 Using join buffer (flat, BKA join)
|
||||
explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join)
|
||||
explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 or companynr < 0;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join)
|
||||
explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 and companynr > 0;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join)
|
||||
explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 or t2.companynr is null;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join)
|
||||
explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 or t2.companynr < 0 or t4.companynr > 0;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join)
|
||||
explain select t2.companynr,companyname from t4 left join t2 using (companynr) where ifnull(t2.companynr,1)>0;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join)
|
||||
explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 or companynr is null;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join)
|
||||
explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 or companynr < 0 or companynr > 0;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join)
|
||||
explain select companynr,companyname from t4 left join t2 using (companynr) where ifnull(companynr,1)>0;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join)
|
||||
select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1;
|
||||
companynr companynr
|
||||
37 36
|
||||
|
|
@ -1438,7 +1438,7 @@ companynr companynr
|
|||
explain select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t4 index NULL PRIMARY 1 NULL 12 Using index; Using temporary
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join)
|
||||
select t2.fld1,t2.companynr,fld3,period from t3,t2 where t2.fld1 = 38208 and t2.fld1=t3.t2nr and period = 1008 or t2.fld1 = 38008 and t2.fld1 =t3.t2nr and period = 1008;
|
||||
fld1 companynr fld3 period
|
||||
038008 37 reporters 1008
|
||||
|
|
@ -2337,7 +2337,7 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 SIMPLE t3 system NULL NULL NULL NULL 0 const row not found
|
||||
1 SIMPLE t4 const id4 NULL NULL NULL 1
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where; Using join buffer (flat, BNL join)
|
||||
select * from t1 left join t2 on id1 = id2 left join t3 on id1 = id3
|
||||
left join t4 on id3 = id4 where id2 = 1 or id4 = 1;
|
||||
id1 id2 id3 id4 id44
|
||||
|
|
@ -2370,7 +2370,7 @@ insert into t2 values (1,3), (2,3), (3,4), (4,4);
|
|||
explain select * from t1 left join t2 on a=c where d in (4);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ref c,d d 5 const 2
|
||||
1 SIMPLE t1 ALL a NULL NULL NULL 4 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL a NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join)
|
||||
select * from t1 left join t2 on a=c where d in (4);
|
||||
a b c d
|
||||
3 2 3 4
|
||||
|
|
@ -2378,7 +2378,7 @@ a b c d
|
|||
explain select * from t1 left join t2 on a=c where d = 4;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ref c,d d 5 const 2
|
||||
1 SIMPLE t1 ALL a NULL NULL NULL 4 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL a NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join)
|
||||
select * from t1 left join t2 on a=c where d = 4;
|
||||
a b c d
|
||||
3 2 3 4
|
||||
|
|
@ -2724,7 +2724,7 @@ where (t1.c=t2.a or (t1.c=t3.a and t2.a=t3.b)) and t1.b=556476786 and
|
|||
t2.b like '%%' order by t2.b limit 0,1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ref b,c b 5 const 1 Using temporary; Using filesort
|
||||
1 SIMPLE t3 index PRIMARY,a,b PRIMARY 8 NULL 2 Using index; Using join buffer
|
||||
1 SIMPLE t3 index PRIMARY,a,b PRIMARY 8 NULL 2 Using index; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 2 Range checked for each record (index map: 0x1)
|
||||
DROP TABLE t1,t2,t3;
|
||||
CREATE TABLE t1 (a int, INDEX idx(a));
|
||||
|
|
@ -2745,7 +2745,7 @@ ALTER TABLE t1 ENABLE KEYS;
|
|||
EXPLAIN SELECT STRAIGHT_JOIN SQL_NO_CACHE COUNT(*) FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 index b b 5 NULL 2 Using index
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
|
||||
SELECT STRAIGHT_JOIN SQL_NO_CACHE * FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL;
|
||||
a b a b
|
||||
1 NULL 1 1
|
||||
|
|
@ -2755,7 +2755,7 @@ a b a b
|
|||
EXPLAIN SELECT STRAIGHT_JOIN SQL_NO_CACHE COUNT(*) FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 index b b 5 NULL 2 Using index
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
|
||||
SELECT STRAIGHT_JOIN SQL_NO_CACHE * FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL;
|
||||
a b a b
|
||||
1 NULL 1 1
|
||||
|
|
@ -2917,11 +2917,11 @@ a
|
|||
EXPLAIN SELECT t1.a FROM t1 STRAIGHT_JOIN t2 ON t1.a=t2.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
|
||||
EXPLAIN SELECT t1.a FROM t1 INNER JOIN t2 ON t1.a=t2.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join)
|
||||
DROP TABLE t1,t2;
|
||||
select x'10' + 0, X'10' + 0, b'10' + 0, B'10' + 0;
|
||||
x'10' + 0 X'10' + 0 b'10' + 0 B'10' + 0
|
||||
|
|
@ -3461,7 +3461,7 @@ explain select * from t2 A, t2 B where A.a=5 and A.b=5 and A.C<5
|
|||
and B.a=5 and B.b=A.e and (B.b =1 or B.b = 3 or B.b=5);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE A range PRIMARY PRIMARY 12 NULL 4 Using index condition; Using where; Using MRR
|
||||
1 SIMPLE B ref PRIMARY PRIMARY 8 const,test.A.e 10 Using join buffer
|
||||
1 SIMPLE B ref PRIMARY PRIMARY 8 const,test.A.e 10 Using join buffer (flat, BKA join)
|
||||
drop table t1, t2;
|
||||
CREATE TABLE t1 (a int PRIMARY KEY, b int, INDEX(b));
|
||||
INSERT INTO t1 VALUES (1, 3), (9,4), (7,5), (4,5), (6,2),
|
||||
|
|
@ -3475,12 +3475,12 @@ EXPLAIN
|
|||
SELECT a, c, d, f FROM t1,t2 WHERE a=c AND b BETWEEN 4 AND 6;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 range PRIMARY,b b 5 NULL 3 Using index condition; Using MRR
|
||||
1 SIMPLE t2 ref c c 5 test.t1.a 2 Using join buffer
|
||||
1 SIMPLE t2 ref c c 5 test.t1.a 2 Using join buffer (flat, BKA join)
|
||||
EXPLAIN
|
||||
SELECT a, c, d, f FROM t1,t2 WHERE a=c AND b BETWEEN 4 AND 6 AND a > 0;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 range PRIMARY,b b 5 NULL 3 Using index condition; Using where; Using MRR
|
||||
1 SIMPLE t2 ref c c 5 test.t1.a 2 Using join buffer
|
||||
1 SIMPLE t2 ref c c 5 test.t1.a 2 Using join buffer (flat, BKA join)
|
||||
DROP TABLE t1, t2;
|
||||
create table t1 (
|
||||
a int unsigned not null auto_increment primary key,
|
||||
|
|
@ -3570,19 +3570,19 @@ FROM t1 JOIN t2 ON t2.fk=t1.pk
|
|||
WHERE t2.fk < 'c' AND t2.pk=t1.fk;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 range PRIMARY PRIMARY 12 NULL 3 Using index condition; Using where; Using MRR
|
||||
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 18 test.t1.fk 1 Using where; Using join buffer
|
||||
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 18 test.t1.fk 1 Using where; Using join buffer (flat, BKA join)
|
||||
EXPLAIN SELECT t2.*
|
||||
FROM t1 JOIN t2 ON t2.fk=t1.pk
|
||||
WHERE t2.fk BETWEEN 'a' AND 'b' AND t2.pk=t1.fk;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 range PRIMARY PRIMARY 12 NULL 2 Using index condition; Using where; Using MRR
|
||||
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 18 test.t1.fk 1 Using where; Using join buffer
|
||||
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 18 test.t1.fk 1 Using where; Using join buffer (flat, BKA join)
|
||||
EXPLAIN SELECT t2.*
|
||||
FROM t1 JOIN t2 ON t2.fk=t1.pk
|
||||
WHERE t2.fk IN ('a','b') AND t2.pk=t1.fk;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 range PRIMARY PRIMARY 12 NULL 2 Using index condition; Using where; Using MRR
|
||||
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 18 test.t1.fk 1 Using where; Using join buffer
|
||||
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 18 test.t1.fk 1 Using where; Using join buffer (flat, BKA join)
|
||||
DROP TABLE t1,t2;
|
||||
CREATE TABLE t1 (a int, b varchar(20) NOT NULL, PRIMARY KEY(a));
|
||||
CREATE TABLE t2 (a int, b varchar(20) NOT NULL,
|
||||
|
|
@ -3616,7 +3616,7 @@ t3.a=t2.a AND t3.c IN ('bb','ee');
|
|||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1
|
||||
1 SIMPLE t2 range si si 5 NULL 4 Using index condition; Using where; Using MRR
|
||||
1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where; Using join buffer
|
||||
1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where; Using join buffer (flat, BKA join)
|
||||
EXPLAIN
|
||||
SELECT t3.a FROM t1,t2,t3
|
||||
WHERE t1.id = 8 AND t2.i BETWEEN t1.b AND t1.e AND
|
||||
|
|
@ -3624,7 +3624,7 @@ t3.a=t2.a AND t3.c IN ('bb','ee') ;
|
|||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1
|
||||
1 SIMPLE t2 range si,ai si 5 NULL 4 Using index condition; Using where; Using MRR
|
||||
1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where; Using join buffer
|
||||
1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where; Using join buffer (flat, BKA join)
|
||||
EXPLAIN
|
||||
SELECT t3.a FROM t1,t2 FORCE INDEX (si),t3
|
||||
WHERE t1.id = 8 AND (t2.i=t1.b OR t2.i=t1.e) AND t3.a=t2.a AND
|
||||
|
|
@ -3632,7 +3632,7 @@ t3.c IN ('bb','ee');
|
|||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1
|
||||
1 SIMPLE t2 range si si 5 NULL 2 Using index condition; Using where; Using MRR
|
||||
1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where; Using join buffer
|
||||
1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where; Using join buffer (flat, BKA join)
|
||||
EXPLAIN
|
||||
SELECT t3.a FROM t1,t2,t3
|
||||
WHERE t1.id = 8 AND (t2.i=t1.b OR t2.i=t1.e) AND t3.a=t2.a AND
|
||||
|
|
@ -3640,7 +3640,7 @@ t3.c IN ('bb','ee');
|
|||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1
|
||||
1 SIMPLE t2 range si,ai si 5 NULL 2 Using index condition; Using where; Using MRR
|
||||
1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where; Using join buffer
|
||||
1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where; Using join buffer (flat, BKA join)
|
||||
DROP TABLE t1,t2,t3;
|
||||
CREATE TABLE t1 ( f1 int primary key, f2 int, f3 int, f4 int, f5 int, f6 int, checked_out int);
|
||||
CREATE TABLE t2 ( f11 int PRIMARY KEY );
|
||||
|
|
@ -4403,7 +4403,7 @@ INSERT INTO t1 VALUES
|
|||
EXPLAIN SELECT 1 FROM t1 NATURAL LEFT JOIN t1 AS t2;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t2 ALL a NULL NULL NULL 2 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL a NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join)
|
||||
SELECT 1 FROM t1 NATURAL LEFT JOIN t1 AS t2;
|
||||
1
|
||||
1
|
||||
|
|
@ -4413,7 +4413,7 @@ SELECT 1 FROM t1 NATURAL LEFT JOIN t1 AS t2;
|
|||
EXPLAIN SELECT 1 FROM t1 NATURAL LEFT JOIN t1 AS t2 FORCE INDEX(a);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t2 ALL a NULL NULL NULL 2 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL a NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join)
|
||||
SELECT 1 FROM t1 NATURAL LEFT JOIN t1 AS t2 FORCE INDEX(a);
|
||||
1
|
||||
1
|
||||
|
|
|
|||
|
|
@ -1431,7 +1431,7 @@ companynr companynr
|
|||
explain select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t4 index NULL PRIMARY 1 NULL 12 Using index; Using temporary
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join)
|
||||
select t2.fld1,t2.companynr,fld3,period from t3,t2 where t2.fld1 = 38208 and t2.fld1=t3.t2nr and period = 1008 or t2.fld1 = 38008 and t2.fld1 =t3.t2nr and period = 1008;
|
||||
fld1 companynr fld3 period
|
||||
038008 37 reporters 1008
|
||||
|
|
@ -2363,7 +2363,7 @@ insert into t2 values (1,3), (2,3), (3,4), (4,4);
|
|||
explain select * from t1 left join t2 on a=c where d in (4);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ref c,d d 5 const 2
|
||||
1 SIMPLE t1 ALL a NULL NULL NULL 4 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL a NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join)
|
||||
select * from t1 left join t2 on a=c where d in (4);
|
||||
a b c d
|
||||
3 2 3 4
|
||||
|
|
@ -2371,7 +2371,7 @@ a b c d
|
|||
explain select * from t1 left join t2 on a=c where d = 4;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ref c,d d 5 const 2
|
||||
1 SIMPLE t1 ALL a NULL NULL NULL 4 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL a NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join)
|
||||
select * from t1 left join t2 on a=c where d = 4;
|
||||
a b c d
|
||||
3 2 3 4
|
||||
|
|
@ -2717,7 +2717,7 @@ where (t1.c=t2.a or (t1.c=t3.a and t2.a=t3.b)) and t1.b=556476786 and
|
|||
t2.b like '%%' order by t2.b limit 0,1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ref b,c b 5 const 1 Using temporary; Using filesort
|
||||
1 SIMPLE t3 index PRIMARY,a,b PRIMARY 8 NULL 2 Using index; Using join buffer
|
||||
1 SIMPLE t3 index PRIMARY,a,b PRIMARY 8 NULL 2 Using index; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 2 Range checked for each record (index map: 0x1)
|
||||
DROP TABLE t1,t2,t3;
|
||||
CREATE TABLE t1 (a int, INDEX idx(a));
|
||||
|
|
@ -2738,7 +2738,7 @@ ALTER TABLE t1 ENABLE KEYS;
|
|||
EXPLAIN SELECT STRAIGHT_JOIN SQL_NO_CACHE COUNT(*) FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 index b b 5 NULL 2 Using index
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
|
||||
SELECT STRAIGHT_JOIN SQL_NO_CACHE * FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL;
|
||||
a b a b
|
||||
1 NULL 1 1
|
||||
|
|
@ -2748,7 +2748,7 @@ a b a b
|
|||
EXPLAIN SELECT STRAIGHT_JOIN SQL_NO_CACHE COUNT(*) FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 index b b 5 NULL 2 Using index
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
|
||||
SELECT STRAIGHT_JOIN SQL_NO_CACHE * FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL;
|
||||
a b a b
|
||||
1 NULL 1 1
|
||||
|
|
@ -2910,11 +2910,11 @@ a
|
|||
EXPLAIN SELECT t1.a FROM t1 STRAIGHT_JOIN t2 ON t1.a=t2.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
|
||||
EXPLAIN SELECT t1.a FROM t1 INNER JOIN t2 ON t1.a=t2.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join)
|
||||
DROP TABLE t1,t2;
|
||||
select x'10' + 0, X'10' + 0, b'10' + 0, B'10' + 0;
|
||||
x'10' + 0 X'10' + 0 b'10' + 0 B'10' + 0
|
||||
|
|
|
|||
|
|
@ -1432,7 +1432,7 @@ companynr companynr
|
|||
explain select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t4 index NULL PRIMARY 1 NULL 12 Using index; Using temporary
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join)
|
||||
select t2.fld1,t2.companynr,fld3,period from t3,t2 where t2.fld1 = 38208 and t2.fld1=t3.t2nr and period = 1008 or t2.fld1 = 38008 and t2.fld1 =t3.t2nr and period = 1008;
|
||||
fld1 companynr fld3 period
|
||||
038008 37 reporters 1008
|
||||
|
|
|
|||
|
|
@ -1435,7 +1435,7 @@ companynr companynr
|
|||
explain select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t4 index NULL PRIMARY 1 NULL 12 Using index; Using temporary
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join)
|
||||
select t2.fld1,t2.companynr,fld3,period from t3,t2 where t2.fld1 = 38208 and t2.fld1=t3.t2nr and period = 1008 or t2.fld1 = 38008 and t2.fld1 =t3.t2nr and period = 1008;
|
||||
fld1 companynr fld3 period
|
||||
038008 37 reporters 1008
|
||||
|
|
|
|||
|
|
@ -906,7 +906,7 @@ explain extended SELECT t1.a, t1.a in (select t2.a from t2,t3 where t3.a=t2.a) F
|
|||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 index NULL PRIMARY 4 NULL 4 100.00 Using index
|
||||
2 DEPENDENT SUBQUERY t2 ref_or_null a a 5 func 2 100.00 Using index
|
||||
2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`a` AS `a`,<in_optimizer>(`test`.`t1`.`a`,<exists>(select 1 from `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t2`.`a`) and ((<cache>(`test`.`t1`.`a`) = `test`.`t2`.`a`) or isnull(`test`.`t2`.`a`))) having <is_not_null_test>(`test`.`t2`.`a`))) AS `t1.a in (select t2.a from t2,t3 where t3.a=t2.a)` from `test`.`t1`
|
||||
drop table t1,t2,t3;
|
||||
|
|
@ -1296,7 +1296,7 @@ a
|
|||
explain extended select * from t2 where t2.a in (select a from t1);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index
|
||||
1 PRIMARY t1 index PRIMARY PRIMARY 4 NULL 4 75.00 Using where; Using index; Using join buffer
|
||||
1 PRIMARY t1 index PRIMARY PRIMARY 4 NULL 4 75.00 Using where; Using index; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where (`test`.`t1`.`a` = `test`.`t2`.`a`)
|
||||
select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
|
||||
|
|
@ -1306,7 +1306,7 @@ a
|
|||
explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index
|
||||
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer
|
||||
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`b` <> 30))
|
||||
select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
|
||||
|
|
@ -1316,7 +1316,7 @@ a
|
|||
explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index
|
||||
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer
|
||||
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer (flat, BNL join)
|
||||
1 PRIMARY t3 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 100.00 Using index
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t3` join `test`.`t2` where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t3`.`a` = `test`.`t1`.`b`))
|
||||
|
|
|
|||
|
|
@ -261,7 +261,7 @@ from t2;
|
|||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00
|
||||
2 DEPENDENT SUBQUERY t1 ref_or_null a a 5 func 2 100.00 Using where; Full scan on NULL key
|
||||
2 DEPENDENT SUBQUERY t4 ALL NULL NULL NULL NULL 100 100.00 Using where; Using join buffer
|
||||
2 DEPENDENT SUBQUERY t4 ALL NULL NULL NULL NULL 100 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1276 Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
|
||||
Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`oref` AS `oref`,<in_optimizer>((`test`.`t2`.`a`,`test`.`t2`.`b`),<exists>(select `test`.`t1`.`a`,`test`.`t1`.`b` from `test`.`t1` join `test`.`t4` where ((`test`.`t1`.`c` = `test`.`t2`.`oref`) and trigcond(((<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`) or isnull(`test`.`t1`.`a`))) and trigcond(((<cache>(`test`.`t2`.`b`) = `test`.`t1`.`b`) or isnull(`test`.`t1`.`b`)))) having (trigcond(<is_not_null_test>(`test`.`t1`.`a`)) and trigcond(<is_not_null_test>(`test`.`t1`.`b`))))) AS `Z` from `test`.`t2`
|
||||
|
|
@ -1024,10 +1024,10 @@ explain select t21.* from t21,t22 where t21.a = t22.a and
|
|||
t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 8 Using temporary; Using filesort
|
||||
1 PRIMARY t21 ALL NULL NULL NULL NULL 26 Using where; Using join buffer
|
||||
1 PRIMARY t22 ALL NULL NULL NULL NULL 26 Using where; Using join buffer
|
||||
1 PRIMARY t21 ALL NULL NULL NULL NULL 26 Using where; Using join buffer (flat, BNL join)
|
||||
1 PRIMARY t22 ALL NULL NULL NULL NULL 26 Using where; Using join buffer (flat, BNL join)
|
||||
2 SUBQUERY t11 ALL NULL NULL NULL NULL 8 Using where
|
||||
2 SUBQUERY t12 ALL NULL NULL NULL NULL 8 Using where; Using join buffer
|
||||
2 SUBQUERY t12 ALL NULL NULL NULL NULL 8 Using where; Using join buffer (flat, BNL join)
|
||||
select t21.* from t21,t22 where t21.a = t22.a and
|
||||
t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a;
|
||||
a b c
|
||||
|
|
@ -1058,7 +1058,7 @@ insert into t0 values(2);
|
|||
explain select * from t1 where 2 in (select a from t0);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t0 ALL NULL NULL NULL NULL 11 Using where; Start temporary; End temporary
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using join buffer
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using join buffer (flat, BNL join)
|
||||
select * from t1 where 2 in (select a from t0);
|
||||
a
|
||||
0
|
||||
|
|
@ -1085,7 +1085,7 @@ set @@optimizer_switch='default,materialization=off';
|
|||
explain select * from t1 where 2 in (select a from t0);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t0 ALL NULL NULL NULL NULL 11 Using where; FirstMatch
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using join buffer
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using join buffer (flat, BNL join)
|
||||
select * from t1 where 2 in (select a from t0);
|
||||
a
|
||||
0
|
||||
|
|
@ -1125,7 +1125,7 @@ insert into t3 select A.a + 10*B.a from t0 A, t0 B;
|
|||
explain select * from t3 where a in (select kp1 from t1 where kp1<20);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 range kp1 kp1 5 NULL 48 Using where; Using index; LooseScan
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where; Using join buffer
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join)
|
||||
create table t4 (pk int primary key);
|
||||
insert into t4 select a from t3;
|
||||
explain select * from t3 where a in (select t1.kp1 from t1,t4 where kp1<20
|
||||
|
|
@ -1133,7 +1133,7 @@ and t4.pk=t1.c);
|
|||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 range kp1 kp1 5 NULL 48 Using index condition; Using where; Using MRR; LooseScan
|
||||
1 PRIMARY t4 eq_ref PRIMARY PRIMARY 4 test.t1.c 1 Using index; FirstMatch(t1)
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where; Using join buffer
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join)
|
||||
drop table t1, t3, t4;
|
||||
create table t1 (a int) as select * from t0 where a < 5;
|
||||
set @save_max_heap_table_size=@@max_heap_table_size;
|
||||
|
|
@ -1142,10 +1142,10 @@ set @@max_heap_table_size= 16384;
|
|||
explain select count(*) from t0 A, t0 B, t0 C, t0 D where D.a in (select a from t1 E);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY E ALL NULL NULL NULL NULL 5 Start temporary
|
||||
1 PRIMARY A ALL NULL NULL NULL NULL 10 Using join buffer
|
||||
1 PRIMARY B ALL NULL NULL NULL NULL 10 Using join buffer
|
||||
1 PRIMARY C ALL NULL NULL NULL NULL 10 Using join buffer
|
||||
1 PRIMARY D ALL NULL NULL NULL NULL 10 Using where; End temporary; Using join buffer
|
||||
1 PRIMARY A ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY C ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY D ALL NULL NULL NULL NULL 10 Using where; End temporary; Using join buffer (flat, BNL join)
|
||||
flush status;
|
||||
select count(*) from t0 A, t0 B, t0 C, t0 D where D.a in (select a from t1 E);
|
||||
count(*)
|
||||
|
|
@ -1183,26 +1183,26 @@ insert into t3 values (1),(2);
|
|||
explain select * from t2 where a in (select a from t1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Start temporary
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; End temporary; Using join buffer
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; End temporary; Using join buffer (flat, BNL join)
|
||||
explain select * from t2 where a in (select a from t2);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Start temporary
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (flat, BNL join)
|
||||
explain select * from t2 where a in (select a from t3);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Start temporary
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer (flat, BNL join)
|
||||
explain select * from t1 where a in (select a from t3);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Start temporary
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer (flat, BNL join)
|
||||
drop table t1, t2, t3;
|
||||
create table t1 (a decimal);
|
||||
insert into t1 values (1),(2);
|
||||
explain select * from t1 where a in (select a from t1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Start temporary
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (flat, BNL join)
|
||||
drop table t1;
|
||||
set @@optimizer_switch=@save_optimizer_switch;
|
||||
create table t1 (a int);
|
||||
|
|
@ -1219,25 +1219,25 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
explain select straight_join * from t1 A, t1 B where A.a in (select a from t2);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY A ALL NULL NULL NULL NULL 10 Using where
|
||||
1 PRIMARY B ALL NULL NULL NULL NULL 10 Using join buffer
|
||||
1 PRIMARY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
|
||||
2 SUBQUERY t2 ALL NULL NULL NULL NULL 10
|
||||
explain select * from t2 where a in (select straight_join A.a from t1 A, t1 B);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where
|
||||
2 SUBQUERY A ALL NULL NULL NULL NULL 10
|
||||
2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer
|
||||
2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
|
||||
explain select * from t2 where a in (select straight_join A.a from t1 A, t1 B);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where
|
||||
2 SUBQUERY A ALL NULL NULL NULL NULL 10
|
||||
2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer
|
||||
2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
|
||||
explain select straight_join * from t2 X, t2 Y
|
||||
where X.a in (select straight_join A.a from t1 A, t1 B);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY X ALL NULL NULL NULL NULL 10 Using where
|
||||
1 PRIMARY Y ALL NULL NULL NULL NULL 10 Using join buffer
|
||||
1 PRIMARY Y ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
|
||||
2 SUBQUERY A ALL NULL NULL NULL NULL 10
|
||||
2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer
|
||||
2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
|
||||
create table t0 (a int, b int);
|
||||
insert into t0 values(1,1);
|
||||
explain select * from t0, t3 where t3.a in (select a from t2) and (t3.a < 10 or t3.a >30);
|
||||
|
|
@ -1262,11 +1262,11 @@ create table t2 as select * from t1;
|
|||
explain select * from t2 where a in (select b from t1 where a=3);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 range a a 5 NULL 8 Using where; Using index; LooseScan
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Using join buffer
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join)
|
||||
explain select * from t2 where (b,a) in (select a,b from t1 where a=3);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 range a a 5 NULL 8 Using where; Using index; LooseScan
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Using join buffer
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join)
|
||||
drop table t1,t2;
|
||||
create table t1 (a int, b int);
|
||||
insert into t1 select a,a from t0;
|
||||
|
|
@ -1324,8 +1324,8 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 PRIMARY t1 ALL NULL NULL NULL NULL 3
|
||||
1 PRIMARY subselect2 eq_ref unique_key unique_key 15 func 1
|
||||
2 SUBQUERY X ALL NULL NULL NULL NULL 6 Using where
|
||||
2 SUBQUERY Y ALL NULL NULL NULL NULL 6 Using join buffer
|
||||
2 SUBQUERY Z ALL NULL NULL NULL NULL 6 Using join buffer
|
||||
2 SUBQUERY Y ALL NULL NULL NULL NULL 6 Using join buffer (flat, BNL join)
|
||||
2 SUBQUERY Z ALL NULL NULL NULL NULL 6 Using join buffer (flat, BNL join)
|
||||
drop table t0,t1,t2;
|
||||
|
||||
BUG#37842: Assertion in DsMrr_impl::dsmrr_init, at handler.cc:4307
|
||||
|
|
@ -1396,7 +1396,7 @@ WHERE cona.postalStripped='T2H3B2'
|
|||
);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 2 1.00
|
||||
1 PRIMARY a index PRIMARY PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer
|
||||
1 PRIMARY a index PRIMARY PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer (flat, BNL join)
|
||||
2 SUBQUERY cona ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
2 SUBQUERY c eq_ref PRIMARY PRIMARY 4 test.cona.idContact 1 100.00
|
||||
Warnings:
|
||||
|
|
|
|||
|
|
@ -167,7 +167,7 @@ from t3;
|
|||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00
|
||||
2 DEPENDENT SUBQUERY t1 ref_or_null a a 5 func 4 100.00 Using where; Full scan on NULL key
|
||||
2 DEPENDENT SUBQUERY t2 ref a a 5 test.t1.b 1 100.00 Using where; Using join buffer
|
||||
2 DEPENDENT SUBQUERY t2 ref a a 5 test.t1.b 1 100.00 Using where; Using join buffer (flat, BKA join)
|
||||
Warnings:
|
||||
Note 1276 Field or reference 'test.t3.oref' of SELECT #2 was resolved in SELECT #1
|
||||
Note 1003 select `test`.`t3`.`a` AS `a`,`test`.`t3`.`oref` AS `oref`,<in_optimizer>(`test`.`t3`.`a`,<exists>(select 1 from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`a` = `test`.`t1`.`b`) and (`test`.`t2`.`b` = `test`.`t3`.`oref`) and trigcond(((<cache>(`test`.`t3`.`a`) = `test`.`t1`.`a`) or isnull(`test`.`t1`.`a`)))) having trigcond(<is_not_null_test>(`test`.`t1`.`a`)))) AS `Z` from `test`.`t3`
|
||||
|
|
@ -195,7 +195,7 @@ from t3;
|
|||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00
|
||||
2 DEPENDENT SUBQUERY t1 ref a a 4 func 2 100.00 Using where; Full scan on NULL key
|
||||
2 DEPENDENT SUBQUERY t2 ref a a 4 test.t1.b 1 100.00 Using where; Using join buffer
|
||||
2 DEPENDENT SUBQUERY t2 ref a a 4 test.t1.b 1 100.00 Using where; Using join buffer (flat, BKA join)
|
||||
Warnings:
|
||||
Note 1276 Field or reference 'test.t3.oref' of SELECT #2 was resolved in SELECT #1
|
||||
Note 1003 select `test`.`t3`.`a` AS `a`,`test`.`t3`.`oref` AS `oref`,<in_optimizer>(`test`.`t3`.`a`,<exists>(select 1 from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`a` = `test`.`t1`.`b`) and (`test`.`t2`.`b` = `test`.`t3`.`oref`) and trigcond((<cache>(`test`.`t3`.`a`) = `test`.`t1`.`a`))))) AS `Z` from `test`.`t3`
|
||||
|
|
@ -268,7 +268,7 @@ from t2;
|
|||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00
|
||||
2 DEPENDENT SUBQUERY t1 ref_or_null a a 5 func 2 100.00 Using where; Full scan on NULL key
|
||||
2 DEPENDENT SUBQUERY t4 ALL NULL NULL NULL NULL 100 100.00 Using where; Using join buffer
|
||||
2 DEPENDENT SUBQUERY t4 ALL NULL NULL NULL NULL 100 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1276 Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
|
||||
Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`oref` AS `oref`,<in_optimizer>((`test`.`t2`.`a`,`test`.`t2`.`b`),<exists>(select `test`.`t1`.`a`,`test`.`t1`.`b` from `test`.`t1` join `test`.`t4` where ((`test`.`t1`.`c` = `test`.`t2`.`oref`) and trigcond(((<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`) or isnull(`test`.`t1`.`a`))) and trigcond(((<cache>(`test`.`t2`.`b`) = `test`.`t1`.`b`) or isnull(`test`.`t1`.`b`)))) having (trigcond(<is_not_null_test>(`test`.`t1`.`a`)) and trigcond(<is_not_null_test>(`test`.`t1`.`b`))))) AS `Z` from `test`.`t2`
|
||||
|
|
@ -739,7 +739,7 @@ WHERE t3.name='xxx' AND t2.id=t3.id);
|
|||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where
|
||||
2 DEPENDENT SUBQUERY t2 eq_ref PRIMARY PRIMARY 4 func 1 Using where; Using index; Full scan on NULL key
|
||||
2 DEPENDENT SUBQUERY t3 eq_ref PRIMARY PRIMARY 4 func 1 Using index condition(BKA); Using where; Full scan on NULL key; Using join buffer
|
||||
2 DEPENDENT SUBQUERY t3 eq_ref PRIMARY PRIMARY 4 func 1 Using index condition(BKA); Using where; Full scan on NULL key; Using join buffer (flat, BKA join)
|
||||
SELECT * FROM t1
|
||||
WHERE t1.id NOT IN (SELECT t2.id FROM t2,t3
|
||||
WHERE t3.name='xxx' AND t2.id=t3.id);
|
||||
|
|
@ -1031,10 +1031,10 @@ explain select t21.* from t21,t22 where t21.a = t22.a and
|
|||
t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 8 Using temporary; Using filesort
|
||||
1 PRIMARY t21 ALL NULL NULL NULL NULL 26 Using where; Using join buffer
|
||||
1 PRIMARY t22 ALL NULL NULL NULL NULL 26 Using where; Using join buffer
|
||||
1 PRIMARY t21 ALL NULL NULL NULL NULL 26 Using where; Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY t22 ALL NULL NULL NULL NULL 26 Using where; Using join buffer (incremental, BNL join)
|
||||
2 SUBQUERY t11 ALL NULL NULL NULL NULL 8 Using where
|
||||
2 SUBQUERY t12 ALL NULL NULL NULL NULL 8 Using where; Using join buffer
|
||||
2 SUBQUERY t12 ALL NULL NULL NULL NULL 8 Using where; Using join buffer (flat, BNL join)
|
||||
select t21.* from t21,t22 where t21.a = t22.a and
|
||||
t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a;
|
||||
a b c
|
||||
|
|
@ -1066,7 +1066,7 @@ insert into t0 values(2);
|
|||
explain select * from t1 where 2 in (select a from t0);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t0 ALL NULL NULL NULL NULL 11 Using where; Start temporary; End temporary
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using join buffer
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using join buffer (flat, BNL join)
|
||||
select * from t1 where 2 in (select a from t0);
|
||||
a
|
||||
0
|
||||
|
|
@ -1093,7 +1093,7 @@ set @@optimizer_switch='default,materialization=off';
|
|||
explain select * from t1 where 2 in (select a from t0);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t0 ALL NULL NULL NULL NULL 11 Using where; FirstMatch
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using join buffer
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using join buffer (flat, BNL join)
|
||||
select * from t1 where 2 in (select a from t0);
|
||||
a
|
||||
0
|
||||
|
|
@ -1120,7 +1120,7 @@ set @@optimizer_switch=@save_optimizer_switch;
|
|||
explain select * from (select a from t0) X where a in (select a from t1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 11
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using where; FirstMatch(<derived2>); Using join buffer
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using where; FirstMatch(<derived2>); Using join buffer (flat, BNL join)
|
||||
2 DERIVED t0 ALL NULL NULL NULL NULL 11
|
||||
drop table t0, t1;
|
||||
create table t0 (a int);
|
||||
|
|
@ -1133,7 +1133,7 @@ insert into t3 select A.a + 10*B.a from t0 A, t0 B;
|
|||
explain select * from t3 where a in (select kp1 from t1 where kp1<20);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 range kp1 kp1 5 NULL 48 Using where; Using index; LooseScan
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where; Using join buffer
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join)
|
||||
create table t4 (pk int primary key);
|
||||
insert into t4 select a from t3;
|
||||
explain select * from t3 where a in (select t1.kp1 from t1,t4 where kp1<20
|
||||
|
|
@ -1141,7 +1141,7 @@ and t4.pk=t1.c);
|
|||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 range kp1 kp1 5 NULL 48 Using index condition; Using where; Using MRR; LooseScan
|
||||
1 PRIMARY t4 eq_ref PRIMARY PRIMARY 4 test.t1.c 1 Using index; FirstMatch(t1)
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where; Using join buffer
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join)
|
||||
drop table t1, t3, t4;
|
||||
create table t1 (a int) as select * from t0 where a < 5;
|
||||
set @save_max_heap_table_size=@@max_heap_table_size;
|
||||
|
|
@ -1150,10 +1150,10 @@ set @@max_heap_table_size= 16384;
|
|||
explain select count(*) from t0 A, t0 B, t0 C, t0 D where D.a in (select a from t1 E);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY E ALL NULL NULL NULL NULL 5 Start temporary
|
||||
1 PRIMARY A ALL NULL NULL NULL NULL 10 Using join buffer
|
||||
1 PRIMARY B ALL NULL NULL NULL NULL 10 Using join buffer
|
||||
1 PRIMARY C ALL NULL NULL NULL NULL 10 Using join buffer
|
||||
1 PRIMARY D ALL NULL NULL NULL NULL 10 Using where; End temporary; Using join buffer
|
||||
1 PRIMARY A ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY B ALL NULL NULL NULL NULL 10 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY C ALL NULL NULL NULL NULL 10 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY D ALL NULL NULL NULL NULL 10 Using where; End temporary; Using join buffer (incremental, BNL join)
|
||||
flush status;
|
||||
select count(*) from t0 A, t0 B, t0 C, t0 D where D.a in (select a from t1 E);
|
||||
count(*)
|
||||
|
|
@ -1173,7 +1173,7 @@ insert into t3 select A.a + 10*B.a, 'filler' from t0 A, t0 B;
|
|||
explain select * from t3 where a in (select a from t2) and (a > 5 or a < 10);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 2
|
||||
1 PRIMARY t3 ref a a 5 test.t2.a 1 Using join buffer
|
||||
1 PRIMARY t3 ref a a 5 test.t2.a 1 Using join buffer (flat, BKA join)
|
||||
2 SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where
|
||||
select * from t3 where a in (select a from t2);
|
||||
a filler
|
||||
|
|
@ -1191,26 +1191,26 @@ insert into t3 values (1),(2);
|
|||
explain select * from t2 where a in (select a from t1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Start temporary
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; End temporary; Using join buffer
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; End temporary; Using join buffer (flat, BNL join)
|
||||
explain select * from t2 where a in (select a from t2);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Start temporary
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (flat, BNL join)
|
||||
explain select * from t2 where a in (select a from t3);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Start temporary
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer (flat, BNL join)
|
||||
explain select * from t1 where a in (select a from t3);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Start temporary
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer (flat, BNL join)
|
||||
drop table t1, t2, t3;
|
||||
create table t1 (a decimal);
|
||||
insert into t1 values (1),(2);
|
||||
explain select * from t1 where a in (select a from t1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Start temporary
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (flat, BNL join)
|
||||
drop table t1;
|
||||
set @@optimizer_switch=@save_optimizer_switch;
|
||||
create table t1 (a int);
|
||||
|
|
@ -1222,44 +1222,44 @@ explain select * from t1, t3 where t3.a in (select a from t2) and (t3.a < 10 or
|
|||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 10 Using where
|
||||
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 10
|
||||
1 PRIMARY t3 ref a a 5 test.t2.a 10 Using join buffer
|
||||
1 PRIMARY t3 ref a a 5 test.t2.a 10 Using join buffer (flat, BKA join)
|
||||
2 SUBQUERY t2 ALL NULL NULL NULL NULL 10 Using where
|
||||
explain select straight_join * from t1 A, t1 B where A.a in (select a from t2);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY A ALL NULL NULL NULL NULL 10 Using where
|
||||
1 PRIMARY B ALL NULL NULL NULL NULL 10 Using join buffer
|
||||
1 PRIMARY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
|
||||
2 SUBQUERY t2 ALL NULL NULL NULL NULL 10
|
||||
explain select * from t2 where a in (select straight_join A.a from t1 A, t1 B);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where
|
||||
2 SUBQUERY A ALL NULL NULL NULL NULL 10
|
||||
2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer
|
||||
2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
|
||||
explain select * from t2 where a in (select straight_join A.a from t1 A, t1 B);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where
|
||||
2 SUBQUERY A ALL NULL NULL NULL NULL 10
|
||||
2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer
|
||||
2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
|
||||
explain select straight_join * from t2 X, t2 Y
|
||||
where X.a in (select straight_join A.a from t1 A, t1 B);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY X ALL NULL NULL NULL NULL 10 Using where
|
||||
1 PRIMARY Y ALL NULL NULL NULL NULL 10 Using join buffer
|
||||
1 PRIMARY Y ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
|
||||
2 SUBQUERY A ALL NULL NULL NULL NULL 10
|
||||
2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer
|
||||
2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
|
||||
create table t0 (a int, b int);
|
||||
insert into t0 values(1,1);
|
||||
explain select * from t0, t3 where t3.a in (select a from t2) and (t3.a < 10 or t3.a >30);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t0 system NULL NULL NULL NULL 1
|
||||
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 10
|
||||
1 PRIMARY t3 ref a a 5 test.t2.a 10 Using join buffer
|
||||
1 PRIMARY t3 ref a a 5 test.t2.a 10 Using join buffer (flat, BKA join)
|
||||
2 SUBQUERY t2 ALL NULL NULL NULL NULL 10 Using where
|
||||
create table t4 as select a as x, a as y from t1;
|
||||
explain select * from t0, t3 where (t3.a, t3.b) in (select x,y from t4) and (t3.a < 10 or t3.a >30);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t0 system NULL NULL NULL NULL 1
|
||||
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 10
|
||||
1 PRIMARY t3 ref a a 5 test.t4.x 10 Using where; Using join buffer
|
||||
1 PRIMARY t3 ref a a 5 test.t4.x 10 Using where; Using join buffer (flat, BKA join)
|
||||
2 SUBQUERY t4 ALL NULL NULL NULL NULL 10 Using where
|
||||
drop table t0,t1,t2,t3,t4;
|
||||
create table t0 (a int);
|
||||
|
|
@ -1270,11 +1270,11 @@ create table t2 as select * from t1;
|
|||
explain select * from t2 where a in (select b from t1 where a=3);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 range a a 5 NULL 8 Using where; Using index; LooseScan
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Using join buffer
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join)
|
||||
explain select * from t2 where (b,a) in (select a,b from t1 where a=3);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 range a a 5 NULL 8 Using where; Using index; LooseScan
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Using join buffer
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join)
|
||||
drop table t1,t2;
|
||||
create table t1 (a int, b int);
|
||||
insert into t1 select a,a from t0;
|
||||
|
|
@ -1303,7 +1303,7 @@ insert into t1 select * from t0;
|
|||
explain select * from t0 where a in (select a from t1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t0 ALL NULL NULL NULL NULL 2
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; FirstMatch(t0); Using join buffer
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; FirstMatch(t0); Using join buffer (flat, BNL join)
|
||||
select * from t0 where a in (select a from t1);
|
||||
a
|
||||
10.24
|
||||
|
|
@ -1316,7 +1316,7 @@ insert into t1 select * from t0;
|
|||
explain select * from t0 where a in (select a from t1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t0 ALL NULL NULL NULL NULL 2
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; FirstMatch(t0); Using join buffer
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; FirstMatch(t0); Using join buffer (flat, BNL join)
|
||||
select * from t0 where a in (select a from t1);
|
||||
a
|
||||
2008-01-01
|
||||
|
|
@ -1332,8 +1332,8 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 PRIMARY t1 ALL NULL NULL NULL NULL 3
|
||||
1 PRIMARY subselect2 eq_ref unique_key unique_key 15 func 1
|
||||
2 SUBQUERY X ALL NULL NULL NULL NULL 6 Using where
|
||||
2 SUBQUERY Y ALL NULL NULL NULL NULL 6 Using join buffer
|
||||
2 SUBQUERY Z ALL NULL NULL NULL NULL 6 Using join buffer
|
||||
2 SUBQUERY Y ALL NULL NULL NULL NULL 6 Using join buffer (flat, BNL join)
|
||||
2 SUBQUERY Z ALL NULL NULL NULL NULL 6 Using join buffer (incremental, BNL join)
|
||||
drop table t0,t1,t2;
|
||||
|
||||
BUG#37842: Assertion in DsMrr_impl::dsmrr_init, at handler.cc:4307
|
||||
|
|
@ -1404,9 +1404,9 @@ WHERE cona.postalStripped='T2H3B2'
|
|||
);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 2 1.00
|
||||
1 PRIMARY a index PRIMARY PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer
|
||||
1 PRIMARY a index PRIMARY PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer (incremental, BNL join)
|
||||
2 SUBQUERY cona ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
2 SUBQUERY c eq_ref PRIMARY PRIMARY 4 test.cona.idContact 1 100.00 Using join buffer
|
||||
2 SUBQUERY c eq_ref PRIMARY PRIMARY 4 test.cona.idContact 1 100.00 Using join buffer (flat, BKA join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`a`.`idIndividual` AS `idIndividual` from `test`.`t1` `a` semi join (`test`.`t3` `cona` join `test`.`t2` `c`) where ((`test`.`c`.`idContact` = `test`.`cona`.`idContact`) and (`test`.`a`.`idIndividual` = `test`.`c`.`idObj`) and (`test`.`cona`.`postalStripped` = 'T2H3B2'))
|
||||
drop table t1,t2,t3;
|
||||
|
|
|
|||
|
|
@ -51,7 +51,7 @@ FROM t3 WHERE 1 = 0 GROUP BY 1;
|
|||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
|
||||
2 DEPENDENT SUBQUERY t1 index NULL PRIMARY 4 NULL 2 Using index
|
||||
2 DEPENDENT SUBQUERY t2 index b b 5 NULL 2 Using where; Using index; Using join buffer
|
||||
2 DEPENDENT SUBQUERY t2 index b b 5 NULL 2 Using where; Using index; Using join buffer (flat, BNL join)
|
||||
# should return 0 rows
|
||||
SELECT
|
||||
(SELECT 1 FROM t1,t2 WHERE t2.b > t3.b)
|
||||
|
|
@ -218,7 +218,7 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5
|
||||
1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1
|
||||
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
|
||||
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
PREPARE stmt FROM "EXPLAIN SELECT EMPNAME
|
||||
FROM t1
|
||||
WHERE EMPNUM IN
|
||||
|
|
@ -233,13 +233,13 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5
|
||||
1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1
|
||||
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
|
||||
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
EXECUTE stmt;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL t1_IDX NULL NULL NULL 5
|
||||
1 SIMPLE subselect2 eq_ref unique_key unique_key 3 func 1
|
||||
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
|
||||
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
DEALLOCATE PREPARE stmt;
|
||||
DROP INDEX t1_IDX ON t1;
|
||||
CREATE INDEX t1_IDX ON t1(EMPNUM);
|
||||
|
|
@ -256,7 +256,7 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5
|
||||
1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1
|
||||
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
|
||||
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
PREPARE stmt FROM "EXPLAIN SELECT EMPNAME
|
||||
FROM t1
|
||||
WHERE EMPNUM IN
|
||||
|
|
@ -271,13 +271,13 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5
|
||||
1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1
|
||||
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
|
||||
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
EXECUTE stmt;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL t1_IDX NULL NULL NULL 5
|
||||
1 SIMPLE subselect2 eq_ref unique_key unique_key 3 func 1
|
||||
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
|
||||
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
DEALLOCATE PREPARE stmt;
|
||||
DROP INDEX t1_IDX ON t1;
|
||||
EXPLAIN SELECT EMPNAME
|
||||
|
|
@ -293,7 +293,7 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 PRIMARY t1 ALL NULL NULL NULL NULL 5
|
||||
1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1
|
||||
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
|
||||
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
PREPARE stmt FROM "EXPLAIN SELECT EMPNAME
|
||||
FROM t1
|
||||
WHERE EMPNUM IN
|
||||
|
|
@ -308,13 +308,13 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 PRIMARY t1 ALL NULL NULL NULL NULL 5
|
||||
1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1
|
||||
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
|
||||
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
EXECUTE stmt;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
|
||||
1 SIMPLE subselect2 eq_ref unique_key unique_key 3 func 1
|
||||
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
|
||||
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
DEALLOCATE PREPARE stmt;
|
||||
SET SESSION optimizer_switch = @old_optimizer_switch;
|
||||
SET SESSION join_cache_level = @old_join_cache_level;
|
||||
|
|
|
|||
|
|
@ -423,7 +423,7 @@ where (c1, c2) in (select b1, b2 from t2i where b2 > '0')) and
|
|||
a1 = c1;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 4 100.00 Using where; Using join buffer
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 4 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
4 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where
|
||||
5 SUBQUERY t2i index it2i2 it2i3 18 NULL 5 100.00 Using where; Using index
|
||||
2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
|
|
@ -659,7 +659,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
|
|||
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
2 DEPENDENT SUBQUERY t1_16 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
3 DEPENDENT SUBQUERY t2_16 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
3 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using join buffer
|
||||
3 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
4 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <in_optimizer>(concat(`test`.`t1`.`a1`,'x'),<exists>(select 1 from `test`.`t1_16` where (<in_optimizer>((`test`.`t1_16`.`a1`,`test`.`t1_16`.`a2`),<exists>(select `test`.`t2_16`.`b1`,`test`.`t2_16`.`b2` from `test`.`t2_16` join `test`.`t2` where ((`test`.`t2`.`b2` = substr(`test`.`t2_16`.`b2`,1,6)) and <in_optimizer>(`test`.`t2`.`b1`,`test`.`t2`.`b1` in ( <materialize> (select `test`.`t3`.`c1` from `test`.`t3` where (`test`.`t3`.`c2` > '0') ), <primary_index_lookup>(`test`.`t2`.`b1` in <temporary table> on distinct_key where ((`test`.`t2`.`b1` = `materialized subselect`.`c1`))))) and (<cache>(`test`.`t1_16`.`a1`) = `test`.`t2_16`.`b1`) and (<cache>(`test`.`t1_16`.`a2`) = `test`.`t2_16`.`b2`)))) and (<cache>(concat(`test`.`t1`.`a1`,'x')) = left(`test`.`t1_16`.`a1`,8)))))
|
||||
|
|
@ -1191,7 +1191,7 @@ SET @@optimizer_switch='default,semijoin=on,materialization=on';
|
|||
EXPLAIN SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 2
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
|
||||
2 SUBQUERY t2 ALL NULL NULL NULL NULL 2
|
||||
SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2);
|
||||
COUNT(*)
|
||||
|
|
|
|||
|
|
@ -910,7 +910,7 @@ explain extended SELECT t1.a, t1.a in (select t2.a from t2,t3 where t3.a=t2.a) F
|
|||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 index NULL PRIMARY 4 NULL 4 100.00 Using index
|
||||
2 DEPENDENT SUBQUERY t2 ref_or_null a a 5 func 2 100.00 Using index
|
||||
2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`a` AS `a`,<in_optimizer>(`test`.`t1`.`a`,<exists>(select 1 from `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t2`.`a`) and ((<cache>(`test`.`t1`.`a`) = `test`.`t2`.`a`) or isnull(`test`.`t2`.`a`))) having <is_not_null_test>(`test`.`t2`.`a`))) AS `t1.a in (select t2.a from t2,t3 where t3.a=t2.a)` from `test`.`t1`
|
||||
drop table t1,t2,t3;
|
||||
|
|
@ -1300,7 +1300,7 @@ a
|
|||
explain extended select * from t2 where t2.a in (select a from t1);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index
|
||||
1 PRIMARY t1 index PRIMARY PRIMARY 4 NULL 4 75.00 Using where; Using index; Using join buffer
|
||||
1 PRIMARY t1 index PRIMARY PRIMARY 4 NULL 4 75.00 Using where; Using index; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where (`test`.`t1`.`a` = `test`.`t2`.`a`)
|
||||
select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
|
||||
|
|
@ -1310,7 +1310,7 @@ a
|
|||
explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index
|
||||
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer
|
||||
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`b` <> 30))
|
||||
select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
|
||||
|
|
@ -1320,7 +1320,7 @@ a
|
|||
explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index
|
||||
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer
|
||||
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer (flat, BNL join)
|
||||
1 PRIMARY t3 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 100.00 Using index
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t3` join `test`.`t2` where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t3`.`a` = `test`.`t1`.`b`))
|
||||
|
|
|
|||
|
|
@ -907,7 +907,7 @@ explain extended SELECT t1.a, t1.a in (select t2.a from t2,t3 where t3.a=t2.a) F
|
|||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 index NULL PRIMARY 4 NULL 4 100.00 Using index
|
||||
2 DEPENDENT SUBQUERY t2 ref_or_null a a 5 func 2 100.00 Using index
|
||||
2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`a` AS `a`,<in_optimizer>(`test`.`t1`.`a`,<exists>(select 1 from `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t2`.`a`) and ((<cache>(`test`.`t1`.`a`) = `test`.`t2`.`a`) or isnull(`test`.`t2`.`a`))) having <is_not_null_test>(`test`.`t2`.`a`))) AS `t1.a in (select t2.a from t2,t3 where t3.a=t2.a)` from `test`.`t1`
|
||||
drop table t1,t2,t3;
|
||||
|
|
@ -1361,7 +1361,7 @@ explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1
|
|||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t2 index NULL a 5 NULL 4 100.00 Using where; Using index
|
||||
2 DEPENDENT SUBQUERY t1 ref a a 5 func 1001 100.00 Using index
|
||||
2 DEPENDENT SUBQUERY t3 index a a 5 NULL 3 100.00 Using where; Using index; Using join buffer
|
||||
2 DEPENDENT SUBQUERY t3 index a a 5 NULL 3 100.00 Using where; Using index; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` where <in_optimizer>(`test`.`t2`.`a`,<exists>(select 1 from `test`.`t1` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t1`.`b`) and (<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`))))
|
||||
insert into t1 values (3,31);
|
||||
|
|
|
|||
|
|
@ -907,7 +907,7 @@ explain extended SELECT t1.a, t1.a in (select t2.a from t2,t3 where t3.a=t2.a) F
|
|||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 index NULL PRIMARY 4 NULL 4 100.00 Using index
|
||||
2 DEPENDENT SUBQUERY t2 ref_or_null a a 5 func 2 100.00 Using index
|
||||
2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`a` AS `a`,<in_optimizer>(`test`.`t1`.`a`,<exists>(select 1 from `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t2`.`a`) and ((<cache>(`test`.`t1`.`a`) = `test`.`t2`.`a`) or isnull(`test`.`t2`.`a`))) having <is_not_null_test>(`test`.`t2`.`a`))) AS `t1.a in (select t2.a from t2,t3 where t3.a=t2.a)` from `test`.`t1`
|
||||
drop table t1,t2,t3;
|
||||
|
|
@ -1318,7 +1318,7 @@ explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1
|
|||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t2 index NULL PRIMARY 4 NULL 4 100.00 Using where; Using index
|
||||
2 SUBQUERY t3 index PRIMARY PRIMARY 4 NULL 3 100.00 Using index
|
||||
2 SUBQUERY t1 ALL NULL NULL NULL NULL 4 100.00 Using where; Using join buffer
|
||||
2 SUBQUERY t1 ALL NULL NULL NULL NULL 4 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` where <in_optimizer>(`test`.`t2`.`a`,`test`.`t2`.`a` in ( <materialize> (select `test`.`t1`.`a` from `test`.`t1` join `test`.`t3` where (`test`.`t1`.`b` = `test`.`t3`.`a`) ), <primary_index_lookup>(`test`.`t2`.`a` in <temporary table> on distinct_key where ((`test`.`t2`.`a` = `materialized subselect`.`a`)))))
|
||||
drop table t1, t2, t3;
|
||||
|
|
@ -1361,7 +1361,7 @@ explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1
|
|||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t2 index NULL a 5 NULL 4 100.00 Using where; Using index
|
||||
2 SUBQUERY t3 index a a 5 NULL 3 100.00 Using index
|
||||
2 SUBQUERY t1 index NULL a 10 NULL 10004 100.00 Using where; Using index; Using join buffer
|
||||
2 SUBQUERY t1 index NULL a 10 NULL 10004 100.00 Using where; Using index; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` where <in_optimizer>(`test`.`t2`.`a`,`test`.`t2`.`a` in ( <materialize> (select `test`.`t1`.`a` from `test`.`t1` join `test`.`t3` where (`test`.`t1`.`b` = `test`.`t3`.`a`) ), <primary_index_lookup>(`test`.`t2`.`a` in <temporary table> on distinct_key where ((`test`.`t2`.`a` = `materialized subselect`.`a`)))))
|
||||
insert into t1 values (3,31);
|
||||
|
|
|
|||
|
|
@ -101,75 +101,75 @@ t1 m10, t1 m11, t1 m12, t1 m13, t1 m14,t1 m15,t1 m16,t1 m17,t1 m18,t1 m19
|
|||
);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY s00 ALL NULL NULL NULL NULL 3 Using where
|
||||
1 PRIMARY s01 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s02 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s03 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s04 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s05 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s06 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s07 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s08 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s09 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s10 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s11 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s12 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s13 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s14 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s15 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s16 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s17 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s18 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s19 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s20 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s21 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s22 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s23 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s24 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s25 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s26 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s27 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s28 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s29 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s30 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s31 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s32 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s33 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s34 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s35 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s36 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s37 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s38 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s39 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s40 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s41 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s42 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s43 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s44 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s45 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s46 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s47 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s48 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s49 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s01 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s02 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s03 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s04 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s05 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s06 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s07 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s08 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s09 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s10 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s11 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s12 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s13 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s14 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s15 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s16 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s17 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s18 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s19 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s20 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s21 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s22 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s23 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s24 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s25 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s26 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s27 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s28 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s29 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s30 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s31 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s32 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s33 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s34 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s35 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s36 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s37 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s38 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s39 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s40 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s41 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s42 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s43 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s44 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s45 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s46 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s47 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s48 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s49 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY m00 ALL NULL NULL NULL NULL 3 Using where
|
||||
2 DEPENDENT SUBQUERY m01 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m02 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m03 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m04 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m05 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m06 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m07 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m08 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m09 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m10 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m11 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m12 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m13 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m14 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m15 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m16 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m17 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m18 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m19 ALL NULL NULL NULL NULL 3 Using where; Using join buffer
|
||||
2 DEPENDENT SUBQUERY m01 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY m02 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY m03 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY m04 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY m05 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY m06 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY m07 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY m08 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY m09 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY m10 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY m11 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY m12 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY m13 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY m14 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY m15 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY m16 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY m17 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY m18 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY m19 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
|
||||
select * from
|
||||
t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t10))
|
||||
where t1.a < 5;
|
||||
|
|
@ -195,7 +195,7 @@ insert into t1 select (A.a + 10 * B.a),1 from t0 A, t0 B;
|
|||
explain extended select * from t1 where a in (select pk from t10 where pk<3);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t10 range PRIMARY PRIMARY 4 NULL 4 100.00 Using where; Using index
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 103 100.00 Using where; Using join buffer
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 103 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t10` join `test`.`t1` where ((`test`.`t1`.`a` = `test`.`t10`.`pk`) and (`test`.`t10`.`pk` < 3))
|
||||
drop table t0, t1, t2;
|
||||
|
|
@ -738,7 +738,7 @@ WHERE int_nokey IN (SELECT it2.int_key
|
|||
FROM it1 LEFT JOIN it2 ON it2.datetime_key);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY it1 index NULL int_key 4 NULL 2 Using index; Start temporary
|
||||
1 PRIMARY ot1 ALL NULL NULL NULL NULL 20 Using join buffer
|
||||
1 PRIMARY ot1 ALL NULL NULL NULL NULL 20 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY it2 ALL NULL NULL NULL NULL 20 Using where; End temporary
|
||||
DROP TABLE ot1, it1, it2;
|
||||
# End of BUG#38075
|
||||
|
|
@ -770,7 +770,7 @@ select a from t1
|
|||
where a in (select c from t2 where d >= some(select e from t3 where b=e));
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 6 100.00 Start temporary
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 7 100.00 Using where; End temporary; Using join buffer
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 7 100.00 Using where; End temporary; Using join buffer (flat, BNL join)
|
||||
3 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where
|
||||
Warnings:
|
||||
Note 1276 Field or reference 'test.t1.b' of SELECT #3 was resolved in SELECT #1
|
||||
|
|
|
|||
|
|
@ -130,7 +130,7 @@ a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
|
|||
from t1 ot where a in (select a from t2 it);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 22
|
||||
1 PRIMARY ot ALL NULL NULL NULL NULL 32 Using where; Using join buffer
|
||||
1 PRIMARY ot ALL NULL NULL NULL NULL 32 Using where; Using join buffer (flat, BNL join)
|
||||
2 SUBQUERY it ALL NULL NULL NULL NULL 22
|
||||
select
|
||||
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
|
||||
|
|
@ -198,7 +198,7 @@ a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
|
|||
from t1 ot where a in (select a from t2 it);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 22
|
||||
1 PRIMARY ot ALL NULL NULL NULL NULL 52 Using where; Using join buffer
|
||||
1 PRIMARY ot ALL NULL NULL NULL NULL 52 Using where; Using join buffer (flat, BNL join)
|
||||
2 SUBQUERY it ALL NULL NULL NULL NULL 22
|
||||
select
|
||||
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
|
||||
|
|
@ -272,7 +272,7 @@ from t0 where a in
|
|||
(select t2.a+t3.a from t1 left join (t2 join t3) on t2.a=t1.a and t3.a=t1.a);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t0 ALL NULL NULL NULL NULL 10 Start temporary
|
||||
1 PRIMARY t1 index NULL a 5 NULL 10 Using index; Using join buffer
|
||||
1 PRIMARY t1 index NULL a 5 NULL 10 Using index; Using join buffer (flat, BNL join)
|
||||
1 PRIMARY t2 ref a a 5 test.t1.a 1 Using where; Using index
|
||||
1 PRIMARY t3 ref a a 5 test.t1.a 1 Using where; Using index; End temporary
|
||||
drop table t0, t1,t2,t3;
|
||||
|
|
|
|||
|
|
@ -40,7 +40,7 @@ a b
|
|||
explain select * from t2 where b in (select a from t1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 3
|
||||
1 PRIMARY t2 ref b b 5 test.t1.a 2 Using join buffer
|
||||
1 PRIMARY t2 ref b b 5 test.t1.a 2 Using join buffer (flat, BKA join)
|
||||
2 SUBQUERY t1 ALL NULL NULL NULL NULL 3 Using where
|
||||
select * from t2 where b in (select a from t1);
|
||||
a b
|
||||
|
|
@ -59,7 +59,7 @@ insert into t3 select a,a, a,a,a from t0;
|
|||
explain select * from t3 where b in (select a from t1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t3 ALL b NULL NULL NULL 10
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where; FirstMatch(t3); Using join buffer
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where; FirstMatch(t3); Using join buffer (flat, BNL join)
|
||||
select * from t3 where b in (select a from t1);
|
||||
a b pk1 pk2 pk3
|
||||
1 1 1 1 1
|
||||
|
|
@ -82,7 +82,7 @@ from t0 A, t0 B where B.a <5;
|
|||
explain select * from t3 where b in (select a from t0);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 10
|
||||
1 PRIMARY t3 ref b b 5 test.t0.a 1 Using join buffer
|
||||
1 PRIMARY t3 ref b b 5 test.t0.a 1 Using join buffer (flat, BKA join)
|
||||
2 SUBQUERY t0 ALL NULL NULL NULL NULL 10 Using where
|
||||
set @save_ecp= @@engine_condition_pushdown;
|
||||
set engine_condition_pushdown=0;
|
||||
|
|
@ -137,7 +137,7 @@ a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
|
|||
from t1 ot where a in (select a from t2 it);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 22
|
||||
1 PRIMARY ot ALL NULL NULL NULL NULL 32 Using where; Using join buffer
|
||||
1 PRIMARY ot ALL NULL NULL NULL NULL 32 Using where; Using join buffer (flat, BNL join)
|
||||
2 SUBQUERY it ALL NULL NULL NULL NULL 22
|
||||
select
|
||||
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
|
||||
|
|
@ -205,7 +205,7 @@ a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
|
|||
from t1 ot where a in (select a from t2 it);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 22
|
||||
1 PRIMARY ot ALL NULL NULL NULL NULL 52 Using where; Using join buffer
|
||||
1 PRIMARY ot ALL NULL NULL NULL NULL 52 Using where; Using join buffer (flat, BNL join)
|
||||
2 SUBQUERY it ALL NULL NULL NULL NULL 22
|
||||
select
|
||||
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
|
||||
|
|
@ -279,7 +279,7 @@ from t0 where a in
|
|||
(select t2.a+t3.a from t1 left join (t2 join t3) on t2.a=t1.a and t3.a=t1.a);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t0 ALL NULL NULL NULL NULL 10 Start temporary
|
||||
1 PRIMARY t1 index NULL a 5 NULL 10 Using index; Using join buffer
|
||||
1 PRIMARY t1 index NULL a 5 NULL 10 Using index; Using join buffer (flat, BNL join)
|
||||
1 PRIMARY t2 ref a a 5 test.t1.a 1 Using where; Using index
|
||||
1 PRIMARY t3 ref a a 5 test.t1.a 1 Using where; Using index; End temporary
|
||||
drop table t0, t1,t2,t3;
|
||||
|
|
@ -318,8 +318,8 @@ WHERE Language='English' AND Percentage > 10 AND
|
|||
t2.Population > 100000);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 range Population,Country Population 4 NULL 1 Using index condition; Using MRR
|
||||
1 PRIMARY t3 eq_ref PRIMARY,Percentage PRIMARY 33 test.t1.Country,const 1 Using index condition; Using where; Using join buffer
|
||||
1 PRIMARY t2 eq_ref PRIMARY,Population PRIMARY 3 test.t3.Country 1 Using index condition(BKA); Using where; Using join buffer
|
||||
1 PRIMARY t3 eq_ref PRIMARY,Percentage PRIMARY 33 test.t1.Country,const 1 Using index condition; Using where; Using join buffer (flat, BKA join)
|
||||
1 PRIMARY t2 eq_ref PRIMARY,Population PRIMARY 3 test.t3.Country 1 Using index condition(BKA); Using where; Using join buffer (incremental, BKA join)
|
||||
DROP TABLE t1,t2,t3;
|
||||
CREATE TABLE t1 (
|
||||
Code char(3) NOT NULL DEFAULT '',
|
||||
|
|
@ -433,8 +433,8 @@ where t0.a in ( select t1.a from t1,t2 where t2.a=t0.a and
|
|||
t1.b=t2.b);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t0 ALL NULL NULL NULL NULL 5 100.00 Using where; Start temporary
|
||||
1 PRIMARY t1 ref a a 5 test.t0.a 1 100.00 Using join buffer
|
||||
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t0.a 1 100.00 Using where; End temporary; Using join buffer
|
||||
1 PRIMARY t1 ref a a 5 test.t0.a 1 100.00 Using join buffer (flat, BKA join)
|
||||
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t0.a 1 100.00 Using where; End temporary; Using join buffer (incremental, BKA join)
|
||||
Warnings:
|
||||
Note 1276 Field or reference 'test.t0.a' of SELECT #2 was resolved in SELECT #1
|
||||
Note 1003 select `test`.`t0`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) join `test`.`t0` where ((`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t1`.`a` = `test`.`t0`.`a`) and (`test`.`t2`.`a` = `test`.`t0`.`a`))
|
||||
|
|
@ -587,7 +587,7 @@ explain
|
|||
select * from t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t3));
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 3
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY t3 unique_subquery PRIMARY PRIMARY 4 func 1 Using index
|
||||
drop table t0, t1, t2, t3;
|
||||
create table t1 (a int);
|
||||
|
|
@ -728,9 +728,9 @@ c2 in (select 1 from t3, t2) and
|
|||
c1 in (select convert(c6,char(1)) from t2);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using join buffer
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where; Using join buffer
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 2 FirstMatch(t2); Using join buffer
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where; Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 2 FirstMatch(t2); Using join buffer (incremental, BNL join)
|
||||
drop table t2, t3;
|
||||
set join_cache_level=default;
|
||||
show variables like 'join_cache_level';
|
||||
|
|
|
|||
|
|
@ -59,7 +59,7 @@ flattening a nested subquery
|
|||
explain select * from t1 where a in (select pk from t10 where t10.a in (select pk from t12));
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where
|
||||
1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where; Using join buffer
|
||||
1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where; Using join buffer (flat, BKA join)
|
||||
1 PRIMARY t12 eq_ref PRIMARY PRIMARY 4 test.t10.a 1 Using index
|
||||
select * from t1 where a in (select pk from t10 where t10.a in (select pk from t12));
|
||||
a b
|
||||
|
|
@ -70,7 +70,7 @@ flattening subquery w/ several tables
|
|||
explain extended select * from t1 where a in (select t10.pk from t10, t12 where t12.pk=t10.a);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 Using where; Using join buffer
|
||||
1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 Using where; Using join buffer (flat, BKA join)
|
||||
1 PRIMARY t12 eq_ref PRIMARY PRIMARY 4 test.t10.a 1 100.00 Using index
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t10` join `test`.`t12` join `test`.`t1` where ((`test`.`t10`.`pk` = `test`.`t1`.`a`) and (`test`.`t12`.`pk` = `test`.`t10`.`a`))
|
||||
|
|
@ -79,8 +79,8 @@ explAin extended
|
|||
select * from t1 left join (t2 A, t2 B) on ( A.A= t1.A And B.A in (select pk from t10));
|
||||
id select_type tABle type possiBle_keys key key_len ref rows filtered ExtrA
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00
|
||||
1 PRIMARY A ALL NULL NULL NULL NULL 3 100.00 Using where; Using join Buffer
|
||||
1 PRIMARY B ALL NULL NULL NULL NULL 3 100.00 Using where; Using join Buffer
|
||||
1 PRIMARY A ALL NULL NULL NULL NULL 3 100.00 Using where; Using join Buffer (flAt, BNL join)
|
||||
1 PRIMARY B ALL NULL NULL NULL NULL 3 100.00 Using where; Using join Buffer (incrementAl, BNL join)
|
||||
2 DEPENDENT SUBQUERY t10 unique_suBquery PRIMARY PRIMARY 4 func 1 100.00 Using index
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`A` AS `A`,`test`.`t1`.`B` AS `B`,`test`.`A`.`A` AS `A`,`test`.`A`.`B` AS `B`,`test`.`B`.`A` AS `A`,`test`.`B`.`B` AS `B` from `test`.`t1` left join (`test`.`t2` `A` join `test`.`t2` `B`) on(((`test`.`A`.`A` = `test`.`t1`.`A`) And <in_optimizer>(`test`.`B`.`A`,<exists>(<primAry_index_lookup>(<cAche>(`test`.`B`.`A`) in t10 on PRIMARY))))) where 1
|
||||
|
|
@ -89,7 +89,7 @@ explAin extended
|
|||
select * from t1 left join t2 on (t2.A= t1.A And t2.A in (select pk from t10));
|
||||
id select_type tABle type possiBle_keys key key_len ref rows filtered ExtrA
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join Buffer
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join Buffer (flAt, BNL join)
|
||||
2 DEPENDENT SUBQUERY t10 unique_suBquery PRIMARY PRIMARY 4 func 1 100.00 Using index
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`A` AS `A`,`test`.`t1`.`B` AS `B`,`test`.`t2`.`A` AS `A`,`test`.`t2`.`B` AS `B` from `test`.`t1` left join `test`.`t2` on(((`test`.`t2`.`A` = `test`.`t1`.`A`) And <in_optimizer>(`test`.`t2`.`A`,<exists>(<primAry_index_lookup>(<cAche>(`test`.`t2`.`A`) in t10 on PRIMARY))))) where 1
|
||||
|
|
@ -108,75 +108,75 @@ t1 m10, t1 m11, t1 m12, t1 m13, t1 m14,t1 m15,t1 m16,t1 m17,t1 m18,t1 m19
|
|||
);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY s00 ALL NULL NULL NULL NULL 3 Using where
|
||||
1 PRIMARY s01 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s02 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s03 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s04 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s05 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s06 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s07 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s08 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s09 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s10 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s11 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s12 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s13 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s14 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s15 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s16 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s17 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s18 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s19 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s20 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s21 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s22 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s23 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s24 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s25 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s26 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s27 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s28 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s29 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s30 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s31 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s32 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s33 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s34 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s35 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s36 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s37 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s38 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s39 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s40 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s41 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s42 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s43 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s44 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s45 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s46 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s47 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s48 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s49 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 PRIMARY s01 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY s02 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s03 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s04 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s05 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s06 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s07 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s08 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s09 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s10 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s11 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s12 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s13 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s14 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s15 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s16 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s17 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s18 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s19 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s20 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s21 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s22 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s23 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s24 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s25 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s26 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s27 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s28 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s29 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s30 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s31 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s32 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s33 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s34 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s35 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s36 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s37 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s38 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s39 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s40 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s41 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s42 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s43 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s44 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s45 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s46 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s47 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s48 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY s49 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
2 DEPENDENT SUBQUERY m00 ALL NULL NULL NULL NULL 3 Using where
|
||||
2 DEPENDENT SUBQUERY m01 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m02 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m03 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m04 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m05 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m06 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m07 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m08 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m09 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m10 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m11 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m12 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m13 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m14 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m15 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m16 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m17 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m18 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
2 DEPENDENT SUBQUERY m19 ALL NULL NULL NULL NULL 3 Using where; Using join buffer
|
||||
2 DEPENDENT SUBQUERY m01 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY m02 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
2 DEPENDENT SUBQUERY m03 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
2 DEPENDENT SUBQUERY m04 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
2 DEPENDENT SUBQUERY m05 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
2 DEPENDENT SUBQUERY m06 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
2 DEPENDENT SUBQUERY m07 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
2 DEPENDENT SUBQUERY m08 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
2 DEPENDENT SUBQUERY m09 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
2 DEPENDENT SUBQUERY m10 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
2 DEPENDENT SUBQUERY m11 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
2 DEPENDENT SUBQUERY m12 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
2 DEPENDENT SUBQUERY m13 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
2 DEPENDENT SUBQUERY m14 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
2 DEPENDENT SUBQUERY m15 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
2 DEPENDENT SUBQUERY m16 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
2 DEPENDENT SUBQUERY m17 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
2 DEPENDENT SUBQUERY m18 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
2 DEPENDENT SUBQUERY m19 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (incremental, BNL join)
|
||||
select * from
|
||||
t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t10))
|
||||
where t1.a < 5;
|
||||
|
|
@ -202,7 +202,7 @@ insert into t1 select (A.a + 10 * B.a),1 from t0 A, t0 B;
|
|||
explain extended select * from t1 where a in (select pk from t10 where pk<3);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t10 range PRIMARY PRIMARY 4 NULL 4 100.00 Using where; Using index
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 103 100.00 Using where; Using join buffer
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 103 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t10` join `test`.`t1` where ((`test`.`t1`.`a` = `test`.`t10`.`pk`) and (`test`.`t10`.`pk` < 3))
|
||||
drop table t0, t1, t2;
|
||||
|
|
@ -340,8 +340,8 @@ WHERE PNUM IN
|
|||
(SELECT PNUM FROM PROJ));
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY STAFF ALL NULL NULL NULL NULL 5
|
||||
1 PRIMARY PROJ ALL NULL NULL NULL NULL 6 Using join buffer
|
||||
1 PRIMARY WORKS ALL NULL NULL NULL NULL 12 Using where; FirstMatch(STAFF); Using join buffer
|
||||
1 PRIMARY PROJ ALL NULL NULL NULL NULL 6 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY WORKS ALL NULL NULL NULL NULL 12 Using where; FirstMatch(STAFF); Using join buffer (incremental, BNL join)
|
||||
SELECT EMPNUM, EMPNAME
|
||||
FROM STAFF
|
||||
WHERE EMPNUM IN
|
||||
|
|
@ -515,7 +515,7 @@ EXPLAIN EXTENDED SELECT vkey FROM t0 WHERE pk IN
|
|||
(SELECT t1.pk FROM t0 t1 JOIN t0 t2 ON t2.vkey = t1.vnokey);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t0 ALL PRIMARY NULL NULL NULL 5 100.00
|
||||
1 PRIMARY t1 eq_ref PRIMARY PRIMARY 4 test.t0.pk 1 100.00 Using where; Using join buffer
|
||||
1 PRIMARY t1 eq_ref PRIMARY PRIMARY 4 test.t0.pk 1 100.00 Using where; Using join buffer (flat, BKA join)
|
||||
1 PRIMARY t2 ref vkey vkey 4 test.t1.vnokey 2 100.00 Using index; FirstMatch(t1)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t0`.`vkey` AS `vkey` from `test`.`t0` `t1` semi join (`test`.`t0` `t2`) join `test`.`t0` where ((`test`.`t2`.`vkey` = `test`.`t1`.`vnokey`) and (`test`.`t1`.`pk` = `test`.`t0`.`pk`))
|
||||
|
|
@ -745,8 +745,8 @@ WHERE int_nokey IN (SELECT it2.int_key
|
|||
FROM it1 LEFT JOIN it2 ON it2.datetime_key);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY it1 index NULL int_key 4 NULL 2 Using index; Start temporary
|
||||
1 PRIMARY ot1 ALL NULL NULL NULL NULL 20 Using join buffer
|
||||
1 PRIMARY it2 ALL NULL NULL NULL NULL 20 Using where; End temporary; Using join buffer
|
||||
1 PRIMARY ot1 ALL NULL NULL NULL NULL 20 Using join buffer (flat, BNL join)
|
||||
1 PRIMARY it2 ALL NULL NULL NULL NULL 20 Using where; End temporary; Using join buffer (incremental, BNL join)
|
||||
DROP TABLE ot1, it1, it2;
|
||||
# End of BUG#38075
|
||||
#
|
||||
|
|
@ -777,7 +777,7 @@ select a from t1
|
|||
where a in (select c from t2 where d >= some(select e from t3 where b=e));
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 6 100.00 Start temporary
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 7 100.00 Using where; End temporary; Using join buffer
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 7 100.00 Using where; End temporary; Using join buffer (flat, BNL join)
|
||||
3 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where
|
||||
Warnings:
|
||||
Note 1276 Field or reference 'test.t1.b' of SELECT #3 was resolved in SELECT #1
|
||||
|
|
@ -828,7 +828,7 @@ pk
|
|||
EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, c) IN (SELECT b, c FROM t2 WHERE pk > 0);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00
|
||||
1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer
|
||||
1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`c` = `test`.`t1`.`c`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0))
|
||||
SELECT pk FROM t1 WHERE (b, c) IN (SELECT b, c FROM t2 WHERE pk > 0);
|
||||
|
|
@ -838,7 +838,7 @@ pk
|
|||
EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, d) IN (SELECT b, d FROM t2 WHERE pk > 0);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00
|
||||
1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer
|
||||
1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`d` = `test`.`t1`.`d`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0))
|
||||
SELECT pk FROM t1 WHERE (b, d) IN (SELECT b, d FROM t2 WHERE pk > 0);
|
||||
|
|
@ -847,7 +847,7 @@ pk
|
|||
EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, e) IN (SELECT b, e FROM t2 WHERE pk > 0);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00
|
||||
1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer
|
||||
1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`e` = `test`.`t1`.`e`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0))
|
||||
SELECT pk FROM t1 WHERE (b, e) IN (SELECT b, e FROM t2 WHERE pk > 0);
|
||||
|
|
@ -857,7 +857,7 @@ pk
|
|||
EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, f) IN (SELECT b, f FROM t2 WHERE pk > 0);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00
|
||||
1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer
|
||||
1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`f` = `test`.`t1`.`f`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0))
|
||||
SELECT pk FROM t1 WHERE (b, f) IN (SELECT b, f FROM t2 WHERE pk > 0);
|
||||
|
|
@ -867,7 +867,7 @@ pk
|
|||
EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, g) IN (SELECT b, g FROM t2 WHERE pk > 0);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00
|
||||
1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer
|
||||
1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`g` = `test`.`t1`.`g`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0))
|
||||
SELECT pk FROM t1 WHERE (b, g) IN (SELECT b, g FROM t2 WHERE pk > 0);
|
||||
|
|
@ -877,7 +877,7 @@ pk
|
|||
EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, h) IN (SELECT b, h FROM t2 WHERE pk > 0);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00
|
||||
1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer
|
||||
1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`h` = `test`.`t1`.`h`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0))
|
||||
SELECT pk FROM t1 WHERE (b, h) IN (SELECT b, h FROM t2 WHERE pk > 0);
|
||||
|
|
@ -887,7 +887,7 @@ pk
|
|||
EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, i) IN (SELECT b, i FROM t2 WHERE pk > 0);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00
|
||||
1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer
|
||||
1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`i` = `test`.`t1`.`i`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0))
|
||||
SELECT pk FROM t1 WHERE (b, i) IN (SELECT b, i FROM t2 WHERE pk > 0);
|
||||
|
|
@ -897,7 +897,7 @@ pk
|
|||
EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, j) IN (SELECT b, j FROM t2 WHERE pk > 0);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00
|
||||
1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer
|
||||
1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`j` = `test`.`t1`.`j`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0))
|
||||
SELECT pk FROM t1 WHERE (b, j) IN (SELECT b, j FROM t2 WHERE pk > 0);
|
||||
|
|
@ -907,7 +907,7 @@ pk
|
|||
EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, k) IN (SELECT b, k FROM t2 WHERE pk > 0);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00
|
||||
1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer
|
||||
1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`k` = `test`.`t1`.`k`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0))
|
||||
SELECT pk FROM t1 WHERE (b, k) IN (SELECT b, k FROM t2 WHERE pk > 0);
|
||||
|
|
@ -1069,8 +1069,8 @@ AND t1.val IN (SELECT t3.val FROM t3
|
|||
WHERE t3.val LIKE 'a%' OR t3.val LIKE 'e%');
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 5
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 5 Using where; FirstMatch(t1); Using join buffer
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 6 Using where; FirstMatch(t3); Using join buffer
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 5 Using where; FirstMatch(t1); Using join buffer (flat, BNL join)
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 6 Using where; FirstMatch(t3); Using join buffer (incremental, BNL join)
|
||||
SELECT *
|
||||
FROM t1
|
||||
WHERE t1.val IN (SELECT t2.val FROM t2
|
||||
|
|
@ -1104,8 +1104,8 @@ SELECT * FROM t0 WHERE t0.a IN
|
|||
(SELECT t1.a FROM t1, t2 WHERE t2.a=t0.a AND t1.b=t2.b);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t0 ALL NULL NULL NULL NULL 5 Using where; Start temporary
|
||||
1 PRIMARY t1 ref a a 5 test.t0.a 1 Using join buffer
|
||||
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t0.a 1 Using where; End temporary; Using join buffer
|
||||
1 PRIMARY t1 ref a a 5 test.t0.a 1 Using join buffer (flat, BKA join)
|
||||
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t0.a 1 Using where; End temporary; Using join buffer (incremental, BKA join)
|
||||
SELECT * FROM t0 WHERE t0.a IN
|
||||
(SELECT t1.a FROM t1, t2 WHERE t2.a=t0.a AND t1.b=t2.b);
|
||||
a
|
||||
|
|
|
|||
|
|
@ -542,7 +542,7 @@ explain (select * from t1 where a=1 and b=10) union (select straight_join t1.a,t
|
|||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
|
||||
2 UNION t1 index PRIMARY PRIMARY 4 NULL 4 Using index
|
||||
2 UNION t2 index PRIMARY PRIMARY 4 NULL 4 Using where; Using index; Using join buffer
|
||||
2 UNION t2 index PRIMARY PRIMARY 4 NULL 4 Using where; Using index; Using join buffer (flat, BNL join)
|
||||
NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL
|
||||
explain (select * from t1 where a=1) union (select * from t1 where b=1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
|
|
|
|||
|
|
@ -2350,7 +2350,7 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
EXPLAIN SELECT * FROM v2 WHERE a=1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ref a a 5 const 1 Using index
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 3 Using where; Using join buffer
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
|
||||
DROP VIEW v1,v2;
|
||||
DROP TABLE t1,t2,t3;
|
||||
create table t1 (f1 int);
|
||||
|
|
|
|||
|
|
@ -58,7 +58,7 @@ a b a b
|
|||
explain select * from t1 as x1, (select * from t1) as x2;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY x1 ALL NULL NULL NULL NULL 4
|
||||
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 4 Using join buffer
|
||||
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 4 Using join buffer (flat, BNL join)
|
||||
2 DERIVED t1 ALL NULL NULL NULL NULL 4
|
||||
drop table if exists t2,t3;
|
||||
select * from (select 1) as a;
|
||||
|
|
@ -115,7 +115,7 @@ explain select * from (select t1.*, t2.a as t2a from t1,t2 where t1.a=t2.a) t1;
|
|||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY <derived2> system NULL NULL NULL NULL 1
|
||||
2 DERIVED t2 ALL NULL NULL NULL NULL 1
|
||||
2 DERIVED t1 ALL NULL NULL NULL NULL 4 Using where; Using join buffer
|
||||
2 DERIVED t1 ALL NULL NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join)
|
||||
drop table t1, t2;
|
||||
create table t1(a int not null, t char(8), index(a));
|
||||
SELECT * FROM (SELECT * FROM t1) as b ORDER BY a ASC LIMIT 0,20;
|
||||
|
|
@ -143,7 +143,7 @@ a t
|
|||
explain select count(*) from t1 as tt1, (select * from t1) as tt2;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY tt1 index NULL a 4 NULL 10000 Using index
|
||||
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 10000 Using join buffer
|
||||
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 10000 Using join buffer (flat, BNL join)
|
||||
2 DERIVED t1 ALL NULL NULL NULL NULL 10000
|
||||
drop table t1;
|
||||
SELECT * FROM (SELECT (SELECT * FROM (SELECT 1 as a) as a )) as b;
|
||||
|
|
@ -190,13 +190,13 @@ pla_id test
|
|||
explain SELECT STRAIGHT_JOIN d.pla_id, m2.mat_id FROM t1 m2 INNER JOIN (SELECT mp.pla_id, MIN(m1.matintnum) AS matintnum FROM t2 mp INNER JOIN t1 m1 ON mp.mat_id=m1.mat_id GROUP BY mp.pla_id) d ON d.matintnum=m2.matintnum;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY m2 ALL NULL NULL NULL NULL 9
|
||||
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
2 DERIVED mp ALL NULL NULL NULL NULL 9 Using temporary; Using filesort
|
||||
2 DERIVED m1 eq_ref PRIMARY PRIMARY 3 test.mp.mat_id 1
|
||||
explain SELECT STRAIGHT_JOIN d.pla_id, m2.test FROM t1 m2 INNER JOIN (SELECT mp.pla_id, MIN(m1.matintnum) AS matintnum FROM t2 mp INNER JOIN t1 m1 ON mp.mat_id=m1.mat_id GROUP BY mp.pla_id) d ON d.matintnum=m2.matintnum;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY m2 ALL NULL NULL NULL NULL 9
|
||||
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
2 DERIVED mp ALL NULL NULL NULL NULL 9 Using temporary; Using filesort
|
||||
2 DERIVED m1 eq_ref PRIMARY PRIMARY 3 test.mp.mat_id 1
|
||||
drop table t1,t2;
|
||||
|
|
@ -250,7 +250,7 @@ a a
|
|||
explain select * from ( select * from t1 union select * from t1) a,(select * from t1 union select * from t1) b;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2
|
||||
1 PRIMARY <derived4> ALL NULL NULL NULL NULL 2 Using join buffer
|
||||
1 PRIMARY <derived4> ALL NULL NULL NULL NULL 2 Using join buffer (flat, BNL join)
|
||||
4 DERIVED t1 ALL NULL NULL NULL NULL 2
|
||||
5 UNION t1 ALL NULL NULL NULL NULL 2
|
||||
NULL UNION RESULT <union4,5> ALL NULL NULL NULL NULL NULL
|
||||
|
|
@ -317,7 +317,7 @@ explain SELECT s.name, AVG(s.val) AS median FROM (SELECT x.name, x.val FROM t1 x
|
|||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 3 Using temporary; Using filesort
|
||||
2 DERIVED x ALL NULL NULL NULL NULL 17 Using temporary; Using filesort
|
||||
2 DERIVED y ALL NULL NULL NULL NULL 17 Using where; Using join buffer
|
||||
2 DERIVED y ALL NULL NULL NULL NULL 17 Using where; Using join buffer (flat, BNL join)
|
||||
drop table t1;
|
||||
create table t2 (a int, b int, primary key (a));
|
||||
insert into t2 values (1,7),(2,7);
|
||||
|
|
|
|||
|
|
@ -300,11 +300,11 @@ WHERE
|
|||
AND ((t1.id=j_lj_t3.id AND t3_lj.id IS NULL) OR (t1.id=t3.id AND t3.idx=2));
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 index id id 4 NULL 2 Using index; Using temporary
|
||||
1 SIMPLE t2 index id id 8 NULL 1 Using index; Distinct; Using join buffer
|
||||
1 SIMPLE t3 index id id 8 NULL 1 Using index; Distinct; Using join buffer
|
||||
1 SIMPLE j_lj_t2 index id id 4 NULL 2 Using where; Using index; Distinct; Using join buffer
|
||||
1 SIMPLE t2 index id id 8 NULL 1 Using index; Distinct; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 index id id 8 NULL 1 Using index; Distinct; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE j_lj_t2 index id id 4 NULL 2 Using where; Using index; Distinct; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t2_lj ref id id 4 test.j_lj_t2.id 1 Using where; Using index; Distinct
|
||||
1 SIMPLE j_lj_t3 index id id 4 NULL 2 Using where; Using index; Distinct; Using join buffer
|
||||
1 SIMPLE j_lj_t3 index id id 4 NULL 2 Using where; Using index; Distinct; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3_lj ref id id 4 test.j_lj_t3.id 1 Using where; Using index; Distinct
|
||||
SELECT DISTINCT
|
||||
t1.id
|
||||
|
|
@ -515,7 +515,7 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
EXPLAIN SELECT DISTINCT t1_1.a, t1_1.b FROM t1 t1_1, t1 t1_2;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1_1 ALL NULL NULL NULL NULL 3 Using temporary
|
||||
1 SIMPLE t1_2 index NULL PRIMARY 4 NULL 3 Using index; Distinct; Using join buffer
|
||||
1 SIMPLE t1_2 index NULL PRIMARY 4 NULL 3 Using index; Distinct; Using join buffer (flat, BNL join)
|
||||
EXPLAIN SELECT DISTINCT t1_1.a, t1_1.b FROM t1 t1_1, t1 t1_2
|
||||
WHERE t1_1.a = t1_2.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
|
|
|
|||
|
|
@ -614,7 +614,7 @@ explain
|
|||
select max(t1.a3), min(t2.a2) from t1, t2 where t1.a2 = 2 and t1.a3 < 'MIN' and t2.a3 > 'CA';
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 range k1 k1 7 NULL 1 Using where; Using index
|
||||
1 SIMPLE t2 range k1 k1 3 NULL 1 Using where; Using index; Using join buffer
|
||||
1 SIMPLE t2 range k1 k1 3 NULL 1 Using where; Using index; Using join buffer (flat, BNL join)
|
||||
explain
|
||||
select min(a4 - 0.01) from t1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
|
|
@ -651,7 +651,7 @@ explain
|
|||
select concat(min(t1.a1),min(t2.a4)) from t1, t2 where t2.a4 <> 'AME';
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 index k2 k2 4 NULL 7 Using where; Using index
|
||||
1 SIMPLE t1 index NULL PRIMARY 3 NULL 15 Using index; Using join buffer
|
||||
1 SIMPLE t1 index NULL PRIMARY 3 NULL 15 Using index; Using join buffer (flat, BNL join)
|
||||
drop table t1, t2;
|
||||
create table t1 (a char(10));
|
||||
insert into t1 values ('a'),('b'),('c');
|
||||
|
|
|
|||
|
|
@ -121,11 +121,11 @@ select @@optimizer_search_depth;
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -133,11 +133,11 @@ Last_query_cost 822.625316
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -145,11 +145,11 @@ Last_query_cost 822.625316
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -157,11 +157,11 @@ Last_query_cost 795.625316
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -169,11 +169,11 @@ Last_query_cost 795.625316
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -181,11 +181,11 @@ Last_query_cost 795.625316
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -201,11 +201,11 @@ select @@optimizer_search_depth;
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -213,11 +213,11 @@ Last_query_cost 822.625316
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -225,11 +225,11 @@ Last_query_cost 822.625316
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -237,11 +237,11 @@ Last_query_cost 290.146368
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -249,11 +249,11 @@ Last_query_cost 290.146368
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -261,11 +261,11 @@ Last_query_cost 290.146368
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -277,11 +277,11 @@ select @@optimizer_search_depth;
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -289,11 +289,11 @@ Last_query_cost 822.625316
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -304,9 +304,9 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
Last_query_cost 795.625316
|
||||
|
|
@ -316,9 +316,9 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
Last_query_cost 795.625316
|
||||
|
|
@ -328,9 +328,9 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
Last_query_cost 795.625316
|
||||
|
|
@ -340,9 +340,9 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
Last_query_cost 795.625316
|
||||
|
|
@ -353,11 +353,11 @@ select @@optimizer_search_depth;
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -365,11 +365,11 @@ Last_query_cost 822.625316
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -377,11 +377,11 @@ Last_query_cost 822.625316
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -389,11 +389,11 @@ Last_query_cost 290.146368
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -401,11 +401,11 @@ Last_query_cost 290.146368
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -413,11 +413,11 @@ Last_query_cost 290.146368
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -433,11 +433,11 @@ select @@optimizer_search_depth;
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -445,11 +445,11 @@ Last_query_cost 822.625316
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -457,11 +457,11 @@ Last_query_cost 822.625316
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -469,11 +469,11 @@ Last_query_cost 795.625316
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -481,11 +481,11 @@ Last_query_cost 795.625316
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -493,11 +493,11 @@ Last_query_cost 795.625316
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -509,11 +509,11 @@ select @@optimizer_search_depth;
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -521,11 +521,11 @@ Last_query_cost 822.625316
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -536,9 +536,9 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
Last_query_cost 795.625316
|
||||
|
|
@ -548,9 +548,9 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
Last_query_cost 795.625316
|
||||
|
|
@ -560,9 +560,9 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
Last_query_cost 795.625316
|
||||
|
|
@ -572,9 +572,9 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
Last_query_cost 795.625316
|
||||
|
|
@ -585,11 +585,11 @@ select @@optimizer_search_depth;
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -597,11 +597,11 @@ Last_query_cost 822.625316
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -609,11 +609,11 @@ Last_query_cost 822.625316
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -621,11 +621,11 @@ Last_query_cost 795.625316
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -633,11 +633,11 @@ Last_query_cost 795.625316
|
|||
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
@ -645,11 +645,11 @@ Last_query_cost 795.625316
|
|||
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
|
||||
show status like 'Last_query_cost';
|
||||
Variable_name Value
|
||||
|
|
|
|||
|
|
@ -537,11 +537,11 @@ a b
|
|||
explain select t1.a,t2.b from t1,t2 where t1.a=t2.a group by t1.a,t2.b;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 6 Using temporary; Using filesort
|
||||
1 SIMPLE t2 ALL a NULL NULL NULL 4 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL a NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join)
|
||||
explain select t1.a,t2.b from t1,t2 where t1.a=t2.a group by t1.a,t2.b ORDER BY NULL;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 6 Using temporary
|
||||
1 SIMPLE t2 ALL a NULL NULL NULL 4 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL a NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join)
|
||||
drop table t1,t2;
|
||||
create table t1 (a int, b int);
|
||||
insert into t1 values (1, 4),(10, 40),(1, 4),(10, 43),(1, 4),(10, 41),(1, 4),(10, 43),(1, 4);
|
||||
|
|
|
|||
|
|
@ -2268,7 +2268,7 @@ ON t1_outer1.a = (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2)
|
|||
AND t1_outer1.b = t1_outer2.b;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1_outer1 ref a a 5 const 1 Using where; Using index
|
||||
1 PRIMARY t1_outer2 index NULL a 10 NULL 15 Using where; Using index; Using join buffer
|
||||
1 PRIMARY t1_outer2 index NULL a 10 NULL 15 Using where; Using index; Using join buffer (flat, BNL join)
|
||||
2 SUBQUERY t1 index NULL a 10 NULL 15 Using index
|
||||
EXPLAIN SELECT (SELECT (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) x
|
||||
FROM t1 AS t1_outer) x2 FROM t1 AS t1_outer2;
|
||||
|
|
|
|||
|
|
@ -229,7 +229,7 @@ t8
|
|||
ON t7.b=t8.b AND t6.b < 10;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using join buffer
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b` from `test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t7`.`b` = `test`.`t8`.`b`) and (`test`.`t6`.`b` < 10))) where 1
|
||||
|
|
@ -544,7 +544,7 @@ t0.b=t1.b AND
|
|||
(t2.a >= 4 OR t2.c IS NULL);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
|
|
@ -639,7 +639,7 @@ t0.b=t1.b AND
|
|||
(t9.a=1);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
|
|
@ -647,7 +647,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
|
|||
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and ((`test`.`t5`.`b` = `test`.`t0`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`)))
|
||||
SELECT t9.a,t9.b
|
||||
|
|
@ -836,7 +836,7 @@ ON t3.a=1 AND t2.b=t4.b
|
|||
WHERE t1.a <= 2;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
Warnings:
|
||||
|
|
@ -850,7 +850,7 @@ LEFT JOIN
|
|||
ON t3.a=1 AND t3.b=t2.b AND t2.b=t4.b;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using join buffer
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t2 ref idx_b idx_b 5 test.t3.b 1 100.00 Using where
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00
|
||||
Warnings:
|
||||
|
|
@ -906,7 +906,7 @@ t0.b=t1.b AND
|
|||
(t9.a=1);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
|
|
@ -914,7 +914,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
|
|||
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and ((`test`.`t5`.`b` = `test`.`t0`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`)))
|
||||
CREATE INDEX idx_b ON t4(b);
|
||||
|
|
@ -956,7 +956,7 @@ t0.b=t1.b AND
|
|||
(t9.a=1);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 1 100.00 Using where
|
||||
|
|
@ -964,7 +964,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
|
|||
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and ((`test`.`t5`.`b` = `test`.`t0`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`)))
|
||||
CREATE INDEX idx_b ON t8(b);
|
||||
|
|
@ -1005,7 +1005,7 @@ t0.b=t1.b AND
|
|||
(t9.a=1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t0 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 1
|
||||
|
|
@ -1013,7 +1013,7 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t7 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 1
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
ATTENTION: the above EXPLAIN has several competing QEPs with identical
|
||||
. costs. To combat the plan change it uses --sorted_result and
|
||||
. and --replace tricks
|
||||
|
|
@ -1064,7 +1064,7 @@ id select_type table type possible_keys key key_len ref rows Extra
|
|||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t7 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 1
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 Using join buffer
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
ATTENTION: the above EXPLAIN has several competing QEPs with identical
|
||||
. costs. To combat the plan change it uses --sorted_result
|
||||
. and --replace tricks
|
||||
|
|
|
|||
|
|
@ -222,27 +222,27 @@ update t1 set y=x;
|
|||
explain select * from t1, t1 t2 where t1.y = 8 and t2.x between 7 and t1.y+0;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ref y y 5 const 1
|
||||
1 SIMPLE t2 range x x 5 NULL 1 Using where; Using join buffer
|
||||
1 SIMPLE t2 range x x 5 NULL 1 Using where; Using join buffer (flat, BNL join)
|
||||
explain select * from t1, t1 t2 where t1.y = 8 and t2.x >= 7 and t2.x <= t1.y+0;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ref y y 5 const 1
|
||||
1 SIMPLE t2 range x x 5 NULL 1 Using where; Using join buffer
|
||||
1 SIMPLE t2 range x x 5 NULL 1 Using where; Using join buffer (flat, BNL join)
|
||||
explain select * from t1, t1 t2 where t1.y = 2 and t2.x between t1.y-1 and t1.y+1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ref y y 5 const 1
|
||||
1 SIMPLE t2 range x x 5 NULL 1 Using where; Using join buffer
|
||||
1 SIMPLE t2 range x x 5 NULL 1 Using where; Using join buffer (flat, BNL join)
|
||||
explain select * from t1, t1 t2 where t1.y = 2 and t2.x >= t1.y-1 and t2.x <= t1.y+1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ref y y 5 const 1
|
||||
1 SIMPLE t2 range x x 5 NULL 1 Using where; Using join buffer
|
||||
1 SIMPLE t2 range x x 5 NULL 1 Using where; Using join buffer (flat, BNL join)
|
||||
explain select * from t1, t1 t2 where t1.y = 2 and t2.x between 0 and t1.y;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ref y y 5 const 1
|
||||
1 SIMPLE t2 range x x 5 NULL 1 Using where; Using join buffer
|
||||
1 SIMPLE t2 range x x 5 NULL 1 Using where; Using join buffer (flat, BNL join)
|
||||
explain select * from t1, t1 t2 where t1.y = 2 and t2.x >= 0 and t2.x <= t1.y;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ref y y 5 const 1
|
||||
1 SIMPLE t2 range x x 5 NULL 1 Using where; Using join buffer
|
||||
1 SIMPLE t2 range x x 5 NULL 1 Using where; Using join buffer (flat, BNL join)
|
||||
explain select count(*) from t1 where x in (1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ref x x 5 const 1 Using index
|
||||
|
|
@ -422,20 +422,20 @@ test.t1 analyze status OK
|
|||
test.t2 analyze status OK
|
||||
explain select * from t1, t2 where t1.uid=t2.uid AND t1.uid > 0;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 range uid_index uid_index 4 NULL 1 Using where
|
||||
1 SIMPLE t2 ref uid_index uid_index 4 test.t1.uid 1
|
||||
1 SIMPLE t2 range uid_index uid_index 4 NULL 1 Using where
|
||||
1 SIMPLE t1 ref uid_index uid_index 4 test.t2.uid 1
|
||||
explain select * from t1, t2 where t1.uid=t2.uid AND t2.uid > 0;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 range uid_index uid_index 4 NULL 1 Using where
|
||||
1 SIMPLE t2 ref uid_index uid_index 4 test.t1.uid 1
|
||||
1 SIMPLE t2 range uid_index uid_index 4 NULL 1 Using where
|
||||
1 SIMPLE t1 ref uid_index uid_index 4 test.t2.uid 1
|
||||
explain select * from t1, t2 where t1.uid=t2.uid AND t1.uid != 0;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 range uid_index uid_index 4 NULL 2 Using where
|
||||
1 SIMPLE t2 ref uid_index uid_index 4 test.t1.uid 1
|
||||
1 SIMPLE t2 range uid_index uid_index 4 NULL 2 Using where
|
||||
1 SIMPLE t1 ref uid_index uid_index 4 test.t2.uid 1
|
||||
explain select * from t1, t2 where t1.uid=t2.uid AND t2.uid != 0;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 range uid_index uid_index 4 NULL 2 Using where
|
||||
1 SIMPLE t2 ref uid_index uid_index 4 test.t1.uid 1
|
||||
1 SIMPLE t2 range uid_index uid_index 4 NULL 2 Using where
|
||||
1 SIMPLE t1 ref uid_index uid_index 4 test.t2.uid 1
|
||||
select * from t1, t2 where t1.uid=t2.uid AND t1.uid > 0;
|
||||
id name uid id name uid
|
||||
1001 A 1 1001 A 1
|
||||
|
|
|
|||
|
|
@ -1437,7 +1437,7 @@ companynr companynr
|
|||
explain select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t4 index NULL PRIMARY 1 NULL 12 Using index; Using temporary
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1200 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 1200 Using where; Using join buffer (flat, BNL join)
|
||||
select t2.fld1,t2.companynr,fld3,period from t3,t2 where t2.fld1 = 38208 and t2.fld1=t3.t2nr and period = 1008 or t2.fld1 = 38008 and t2.fld1 =t3.t2nr and period = 1008;
|
||||
fld1 companynr fld3 period
|
||||
038008 37 reporters 1008
|
||||
|
|
@ -2723,7 +2723,7 @@ where (t1.c=t2.a or (t1.c=t3.a and t2.a=t3.b)) and t1.b=556476786 and
|
|||
t2.b like '%%' order by t2.b limit 0,1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ref b,c b 5 const 1 Using temporary; Using filesort
|
||||
1 SIMPLE t3 index PRIMARY,a,b PRIMARY 8 NULL 2 Using index; Using join buffer
|
||||
1 SIMPLE t3 index PRIMARY,a,b PRIMARY 8 NULL 2 Using index; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 2 Range checked for each record (index map: 0x1)
|
||||
DROP TABLE t1,t2,t3;
|
||||
CREATE TABLE t1 (a int, INDEX idx(a));
|
||||
|
|
@ -2746,7 +2746,7 @@ Note 1031 Table storage engine for 't1' doesn't have this option
|
|||
EXPLAIN SELECT STRAIGHT_JOIN SQL_NO_CACHE COUNT(*) FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 index b b 5 NULL 2 Using index
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
|
||||
SELECT STRAIGHT_JOIN SQL_NO_CACHE * FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL;
|
||||
a b a b
|
||||
1 NULL 1 1
|
||||
|
|
@ -2756,7 +2756,7 @@ a b a b
|
|||
EXPLAIN SELECT STRAIGHT_JOIN SQL_NO_CACHE COUNT(*) FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 index b b 5 NULL 2 Using index
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
|
||||
SELECT STRAIGHT_JOIN SQL_NO_CACHE * FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL;
|
||||
a b a b
|
||||
1 NULL 1 1
|
||||
|
|
@ -2910,11 +2910,11 @@ a
|
|||
EXPLAIN SELECT t1.a FROM t1 STRAIGHT_JOIN t2 ON t1.a=t2.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
|
||||
EXPLAIN SELECT t1.a FROM t1 INNER JOIN t2 ON t1.a=t2.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join)
|
||||
DROP TABLE t1,t2;
|
||||
select x'10' + 0, X'10' + 0, b'10' + 0, B'10' + 0;
|
||||
x'10' + 0 X'10' + 0 b'10' + 0 B'10' + 0
|
||||
|
|
|
|||
|
|
@ -906,7 +906,7 @@ explain extended SELECT t1.a, t1.a in (select t2.a from t2,t3 where t3.a=t2.a) F
|
|||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 index NULL PRIMARY 4 NULL 4 100.00 Using index
|
||||
2 DEPENDENT SUBQUERY t2 ref_or_null a a 5 func 2 100.00 Using index
|
||||
2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
||||
2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`a` AS `a`,<in_optimizer>(`test`.`t1`.`a`,<exists>(select 1 from `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t2`.`a`) and ((<cache>(`test`.`t1`.`a`) = `test`.`t2`.`a`) or isnull(`test`.`t2`.`a`))) having <is_not_null_test>(`test`.`t2`.`a`))) AS `t1.a in (select t2.a from t2,t3 where t3.a=t2.a)` from `test`.`t1`
|
||||
drop table t1,t2,t3;
|
||||
|
|
@ -1296,7 +1296,7 @@ a
|
|||
explain extended select * from t2 where t2.a in (select a from t1);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index
|
||||
1 PRIMARY t1 index PRIMARY PRIMARY 4 NULL 4 75.00 Using where; Using index; Using join buffer
|
||||
1 PRIMARY t1 index PRIMARY PRIMARY 4 NULL 4 75.00 Using where; Using index; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where (`test`.`t1`.`a` = `test`.`t2`.`a`)
|
||||
select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
|
||||
|
|
@ -1306,7 +1306,7 @@ a
|
|||
explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index
|
||||
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer
|
||||
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`b` <> 30))
|
||||
select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
|
||||
|
|
@ -1316,7 +1316,7 @@ a
|
|||
explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index
|
||||
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer
|
||||
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer (flat, BNL join)
|
||||
1 PRIMARY t3 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 100.00 Using index
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t3` join `test`.`t2` where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t3`.`a` = `test`.`t1`.`b`))
|
||||
|
|
@ -3554,7 +3554,7 @@ WHERE t1.t < t2.t AND t1.i2=1 AND t2.i1=t1.i1
|
|||
ORDER BY t1.t DESC LIMIT 1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 1
|
||||
1 PRIMARY t1 index NULL PRIMARY 16 NULL 11 Using where; Using index; Using join buffer
|
||||
1 PRIMARY t1 index NULL PRIMARY 16 NULL 11 Using where; Using index; Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY t1 ref PRIMARY PRIMARY 8 test.t2.i1,const 1 Using where; Using index; Using filesort
|
||||
SELECT * FROM t1,t2
|
||||
WHERE t1.t = (SELECT t1.t FROM t1
|
||||
|
|
|
|||
|
|
@ -500,7 +500,7 @@ explain (select * from t1 where a=1 and b=10) union (select straight_join t1.a,t
|
|||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
|
||||
2 UNION t1 index PRIMARY PRIMARY 4 NULL 4 Using index
|
||||
2 UNION t2 index PRIMARY PRIMARY 4 NULL 4 Using where; Using index; Using join buffer
|
||||
2 UNION t2 index PRIMARY PRIMARY 4 NULL 4 Using where; Using index; Using join buffer (flat, BNL join)
|
||||
NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL
|
||||
explain (select * from t1 where a=1) union (select * from t1 where b=1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
|
|
|
|||
|
|
@ -10,7 +10,7 @@ explain
|
|||
select * from t1,t2 where t1.b=t2.c and d <= 100;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ref idx idx 5 test.t1.b 2 Using where; Using join buffer
|
||||
1 SIMPLE t2 ref idx idx 5 test.t1.b 2 Using where; Using join buffer (flat, BKA join)
|
||||
select * from t1,t2 where t1.b=t2.c and d <= 100;
|
||||
a b c d v
|
||||
4 20 20 100 101
|
||||
|
|
|
|||
|
|
@ -64,7 +64,7 @@ a b c
|
|||
explain select * from t1 where b in (select c from t3);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t3 index c c 5 NULL 3 Using index
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join)
|
||||
# select_type=PRIMARY, type=range,ref
|
||||
select * from t1 where c in (select c from t3 where c between -2 and -1);
|
||||
a b c
|
||||
|
|
|
|||
|
|
@ -64,7 +64,7 @@ a b c
|
|||
explain select * from t1 where b in (select c from t3);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t3 index c c 5 NULL 3 Using index
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join)
|
||||
# select_type=PRIMARY, type=range,ref
|
||||
select * from t1 where c in (select c from t3 where c between -2 and -1);
|
||||
a b c
|
||||
|
|
|
|||
|
|
@ -2372,6 +2372,54 @@ finish:
|
|||
return rc;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
Add a comment on the join algorithm employed by the join cache
|
||||
|
||||
SYNOPSIS
|
||||
print_explain_comment()
|
||||
str string to add the comment on the employed join algorithm to
|
||||
|
||||
DESCRIPTION
|
||||
This function adds info on the type of the used join buffer (flat or
|
||||
incremental) and on the type of the the employed join algorithm (BNL,
|
||||
BNLH, BKA or BKAH) to the the end of the sring str.
|
||||
|
||||
RETURN VALUE
|
||||
none
|
||||
*/
|
||||
|
||||
void JOIN_CACHE::print_explain_comment(String *str)
|
||||
{
|
||||
str->append(STRING_WITH_LEN(" ("));
|
||||
const char *buffer_type= prev_cache ? "incremental" : "flat";
|
||||
str->append(buffer_type);
|
||||
str->append(STRING_WITH_LEN(", "));
|
||||
|
||||
const char *join_alg;
|
||||
switch (get_join_alg()) {
|
||||
case BNL_JOIN_ALG:
|
||||
join_alg= "BNL";
|
||||
break;
|
||||
case BNLH_JOIN_ALG:
|
||||
join_alg= "BNLH";
|
||||
break;
|
||||
case BKA_JOIN_ALG:
|
||||
join_alg= "BKA";
|
||||
break;
|
||||
case BKAH_JOIN_ALG:
|
||||
join_alg= "BKAH";
|
||||
break;
|
||||
default:
|
||||
DBUG_ASSERT(0);
|
||||
}
|
||||
|
||||
str->append(join_alg);
|
||||
str->append(STRING_WITH_LEN(" join"));
|
||||
str->append(STRING_WITH_LEN(")"));
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
Initialize a hashed join cache
|
||||
|
||||
|
|
|
|||
|
|
@ -7644,9 +7644,8 @@ uint check_join_cache_usage(JOIN_TAB *tab,
|
|||
case JT_ALL:
|
||||
if (cache_level == 1)
|
||||
prev_cache= 0;
|
||||
if ((options & SELECT_DESCRIBE) ||
|
||||
(((tab->cache= new JOIN_CACHE_BNL(join, tab, prev_cache))) &&
|
||||
!tab->cache->init()))
|
||||
if ((tab->cache= new JOIN_CACHE_BNL(join, tab, prev_cache)) &&
|
||||
((options & SELECT_DESCRIBE) || !tab->cache->init()))
|
||||
{
|
||||
*icp_other_tables_ok= FALSE;
|
||||
return (2-test(!prev_cache));
|
||||
|
|
@ -7670,9 +7669,8 @@ uint check_join_cache_usage(JOIN_TAB *tab,
|
|||
{
|
||||
if (cache_level == 3)
|
||||
prev_cache= 0;
|
||||
if ((options & SELECT_DESCRIBE) ||
|
||||
((tab->cache= new JOIN_CACHE_BNLH(join, tab, prev_cache)) &&
|
||||
!tab->cache->init()))
|
||||
if ((tab->cache= new JOIN_CACHE_BNLH(join, tab, prev_cache)) &&
|
||||
((options & SELECT_DESCRIBE) || !tab->cache->init()))
|
||||
{
|
||||
*icp_other_tables_ok= FALSE;
|
||||
return (4-test(!prev_cache));
|
||||
|
|
@ -7692,9 +7690,8 @@ uint check_join_cache_usage(JOIN_TAB *tab,
|
|||
{
|
||||
if (cache_level == 5)
|
||||
prev_cache= 0;
|
||||
if ((options & SELECT_DESCRIBE) ||
|
||||
((tab->cache= new JOIN_CACHE_BKA(join, tab, flags, prev_cache)) &&
|
||||
!tab->cache->init()))
|
||||
if ((tab->cache= new JOIN_CACHE_BKA(join, tab, flags, prev_cache)) &&
|
||||
((options & SELECT_DESCRIBE) || !tab->cache->init()))
|
||||
return (6-test(!prev_cache));
|
||||
goto no_join_cache;
|
||||
}
|
||||
|
|
@ -7702,9 +7699,8 @@ uint check_join_cache_usage(JOIN_TAB *tab,
|
|||
{
|
||||
if (cache_level == 7)
|
||||
prev_cache= 0;
|
||||
if ((options & SELECT_DESCRIBE) ||
|
||||
((tab->cache= new JOIN_CACHE_BKAH(join, tab, flags, prev_cache)) &&
|
||||
!tab->cache->init()))
|
||||
if ((tab->cache= new JOIN_CACHE_BKAH(join, tab, flags, prev_cache)) &&
|
||||
((options & SELECT_DESCRIBE) || !tab->cache->init()))
|
||||
{
|
||||
*idx_cond_fact_out= FALSE;
|
||||
return (8-test(!prev_cache));
|
||||
|
|
@ -18923,8 +18919,11 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
|
|||
}
|
||||
}
|
||||
|
||||
if (i > 0 && tab[-1].next_select == sub_select_cache)
|
||||
if (tab->cache)
|
||||
{
|
||||
extra.append(STRING_WITH_LEN("; Using join buffer"));
|
||||
tab->cache->print_explain_comment(&extra);
|
||||
}
|
||||
|
||||
/* Skip initial "; "*/
|
||||
const char *str= extra.ptr();
|
||||
|
|
|
|||
138
sql/sql_select.h
138
sql/sql_select.h
|
|
@ -885,7 +885,50 @@ protected:
|
|||
/* Check matching to a partial join record from the join buffer */
|
||||
bool check_match(uchar *rec_ptr);
|
||||
|
||||
/*
|
||||
This constructor creates an unlinked join cache. The cache is to be
|
||||
used to join table 'tab' to the result of joining the previous tables
|
||||
specified by the 'j' parameter.
|
||||
*/
|
||||
JOIN_CACHE(JOIN *j, JOIN_TAB *tab)
|
||||
{
|
||||
join= j;
|
||||
join_tab= tab;
|
||||
prev_cache= next_cache= 0;
|
||||
buff= 0;
|
||||
}
|
||||
|
||||
/*
|
||||
This constructor creates a linked join cache. The cache is to be
|
||||
used to join table 'tab' to the result of joining the previous tables
|
||||
specified by the 'j' parameter. The parameter 'prev' specifies the previous
|
||||
cache object to which this cache is linked.
|
||||
*/
|
||||
JOIN_CACHE(JOIN *j, JOIN_TAB *tab, JOIN_CACHE *prev)
|
||||
{
|
||||
join= j;
|
||||
join_tab= tab;
|
||||
next_cache= 0;
|
||||
prev_cache= prev;
|
||||
buff= 0;
|
||||
if (prev)
|
||||
prev->next_cache= this;
|
||||
}
|
||||
|
||||
public:
|
||||
|
||||
/*
|
||||
The enumeration type Join_algorithm includes a mnemonic constant for
|
||||
each join algorithm that employs join buffers
|
||||
*/
|
||||
|
||||
enum Join_algorithm
|
||||
{
|
||||
BNL_JOIN_ALG, /* Block Nested Loop Join algorithm */
|
||||
BNLH_JOIN_ALG, /* Block Nested Loop Hash Join algorithm */
|
||||
BKA_JOIN_ALG, /* Batched Key Access Join algorithm */
|
||||
BKAH_JOIN_ALG, /* Batched Key Access with Hash Table Join Algorithm */
|
||||
};
|
||||
|
||||
/*
|
||||
The enumeration type Match_flag describes possible states of the match flag
|
||||
|
|
@ -926,6 +969,9 @@ public:
|
|||
/* Shrink the size if the cache join buffer in a given ratio */
|
||||
bool shrink_join_buffer_in_ratio(ulonglong n, ulonglong d);
|
||||
|
||||
/* Shall return the type of the employed join algorithm */
|
||||
virtual enum Join_algorithm get_join_alg()= 0;
|
||||
|
||||
/*
|
||||
The function shall return TRUE only when there is a key access
|
||||
to the join table
|
||||
|
|
@ -971,6 +1017,9 @@ public:
|
|||
/* Join records from the join buffer with records from the next join table */
|
||||
enum_nested_loop_state join_records(bool skip_last);
|
||||
|
||||
/* Add a comment on the join algorithm employed by the join cache */
|
||||
void print_explain_comment(String *str);
|
||||
|
||||
virtual ~JOIN_CACHE() {}
|
||||
void reset_join(JOIN *j) { join= j; }
|
||||
void free()
|
||||
|
|
@ -1241,6 +1290,22 @@ protected:
|
|||
/* Reallocate the join buffer of a hashed join cache */
|
||||
int realloc_buffer();
|
||||
|
||||
/*
|
||||
This constructor creates an unlinked hashed join cache. The cache is to be
|
||||
used to join table 'tab' to the result of joining the previous tables
|
||||
specified by the 'j' parameter.
|
||||
*/
|
||||
JOIN_CACHE_HASHED(JOIN *j, JOIN_TAB *tab) :JOIN_CACHE(j, tab) {}
|
||||
|
||||
/*
|
||||
This constructor creates a linked hashed join cache. The cache is to be
|
||||
used to join table 'tab' to the result of joining the previous tables
|
||||
specified by the 'j' parameter. The parameter 'prev' specifies the previous
|
||||
cache object to which this cache is linked.
|
||||
*/
|
||||
JOIN_CACHE_HASHED(JOIN *j, JOIN_TAB *tab, JOIN_CACHE *prev)
|
||||
:JOIN_CACHE(j, tab, prev) {}
|
||||
|
||||
public:
|
||||
|
||||
/* Initialize a hashed join cache */
|
||||
|
|
@ -1368,12 +1433,7 @@ public:
|
|||
used to join table 'tab' to the result of joining the previous tables
|
||||
specified by the 'j' parameter.
|
||||
*/
|
||||
JOIN_CACHE_BNL(JOIN *j, JOIN_TAB *tab)
|
||||
{
|
||||
join= j;
|
||||
join_tab= tab;
|
||||
prev_cache= next_cache= 0;
|
||||
}
|
||||
JOIN_CACHE_BNL(JOIN *j, JOIN_TAB *tab) :JOIN_CACHE(j, tab) {}
|
||||
|
||||
/*
|
||||
This constructor creates a linked BNL join cache. The cache is to be
|
||||
|
|
@ -1381,19 +1441,14 @@ public:
|
|||
specified by the 'j' parameter. The parameter 'prev' specifies the previous
|
||||
cache object to which this cache is linked.
|
||||
*/
|
||||
JOIN_CACHE_BNL(JOIN *j, JOIN_TAB *tab, JOIN_CACHE *prev)
|
||||
{
|
||||
join= j;
|
||||
join_tab= tab;
|
||||
prev_cache= prev;
|
||||
next_cache= 0;
|
||||
if (prev)
|
||||
prev->next_cache= this;
|
||||
}
|
||||
JOIN_CACHE_BNL(JOIN *j, JOIN_TAB *tab, JOIN_CACHE *prev)
|
||||
:JOIN_CACHE(j, tab, prev) {}
|
||||
|
||||
/* Initialize the BNL cache */
|
||||
int init();
|
||||
|
||||
enum Join_algorithm get_join_alg() { return BNL_JOIN_ALG; }
|
||||
|
||||
bool is_key_access() { return FALSE; }
|
||||
|
||||
};
|
||||
|
|
@ -1445,12 +1500,7 @@ public:
|
|||
used to join table 'tab' to the result of joining the previous tables
|
||||
specified by the 'j' parameter.
|
||||
*/
|
||||
JOIN_CACHE_BNLH(JOIN *j, JOIN_TAB *tab)
|
||||
{
|
||||
join= j;
|
||||
join_tab= tab;
|
||||
prev_cache= next_cache= 0;
|
||||
}
|
||||
JOIN_CACHE_BNLH(JOIN *j, JOIN_TAB *tab) : JOIN_CACHE_HASHED(j, tab) {}
|
||||
|
||||
/*
|
||||
This constructor creates a linked BNLH join cache. The cache is to be
|
||||
|
|
@ -1458,19 +1508,14 @@ public:
|
|||
specified by the 'j' parameter. The parameter 'prev' specifies the previous
|
||||
cache object to which this cache is linked.
|
||||
*/
|
||||
JOIN_CACHE_BNLH(JOIN *j, JOIN_TAB *tab, JOIN_CACHE *prev)
|
||||
{
|
||||
join= j;
|
||||
join_tab= tab;
|
||||
prev_cache= prev;
|
||||
next_cache= 0;
|
||||
if (prev)
|
||||
prev->next_cache= this;
|
||||
}
|
||||
JOIN_CACHE_BNLH(JOIN *j, JOIN_TAB *tab, JOIN_CACHE *prev)
|
||||
: JOIN_CACHE_HASHED(j, tab, prev) {}
|
||||
|
||||
/* Initialize the BNLH cache */
|
||||
int init();
|
||||
|
||||
enum Join_algorithm get_join_alg() { return BNLH_JOIN_ALG; }
|
||||
|
||||
bool is_key_access() { return TRUE; }
|
||||
|
||||
};
|
||||
|
|
@ -1583,13 +1628,7 @@ public:
|
|||
The MRR mode initially is set to 'flags'.
|
||||
*/
|
||||
JOIN_CACHE_BKA(JOIN *j, JOIN_TAB *tab, uint flags)
|
||||
{
|
||||
join= j;
|
||||
join_tab= tab;
|
||||
prev_cache= next_cache= 0;
|
||||
mrr_mode= flags;
|
||||
}
|
||||
|
||||
:JOIN_CACHE(j, tab), mrr_mode(flags) {}
|
||||
/*
|
||||
This constructor creates a linked BKA join cache. The cache is to be
|
||||
used to join table 'tab' to the result of joining the previous tables
|
||||
|
|
@ -1598,21 +1637,15 @@ public:
|
|||
The MRR mode initially is set to 'flags'.
|
||||
*/
|
||||
JOIN_CACHE_BKA(JOIN *j, JOIN_TAB *tab, uint flags, JOIN_CACHE *prev)
|
||||
{
|
||||
join= j;
|
||||
join_tab= tab;
|
||||
prev_cache= prev;
|
||||
next_cache= 0;
|
||||
if (prev)
|
||||
prev->next_cache= this;
|
||||
mrr_mode= flags;
|
||||
}
|
||||
:JOIN_CACHE(j, tab, prev), mrr_mode(flags) {}
|
||||
|
||||
uchar **get_curr_association_ptr() { return &curr_association; }
|
||||
|
||||
/* Initialize the BKA cache */
|
||||
int init();
|
||||
|
||||
enum Join_algorithm get_join_alg() { return BKA_JOIN_ALG; }
|
||||
|
||||
bool is_key_access() { return TRUE; }
|
||||
|
||||
/* Get the key built over the next record from the join buffer */
|
||||
|
|
@ -1688,10 +1721,8 @@ public:
|
|||
specified by the 'j' parameter.
|
||||
The MRR mode initially is set to 'flags'.
|
||||
*/
|
||||
JOIN_CACHE_BKAH(JOIN *j, JOIN_TAB *tab, uint flags) :JOIN_CACHE_BNLH(j, tab)
|
||||
{
|
||||
mrr_mode= flags;
|
||||
}
|
||||
JOIN_CACHE_BKAH(JOIN *j, JOIN_TAB *tab, uint flags)
|
||||
:JOIN_CACHE_BNLH(j, tab), mrr_mode(flags) {}
|
||||
|
||||
/*
|
||||
This constructor creates a linked BKAH join cache. The cache is to be
|
||||
|
|
@ -1701,16 +1732,15 @@ public:
|
|||
The MRR mode initially is set to 'flags'.
|
||||
*/
|
||||
JOIN_CACHE_BKAH(JOIN *j, JOIN_TAB *tab, uint flags, JOIN_CACHE *prev)
|
||||
:JOIN_CACHE_BNLH(j, tab, prev)
|
||||
{
|
||||
mrr_mode= flags;
|
||||
}
|
||||
:JOIN_CACHE_BNLH(j, tab, prev), mrr_mode(flags) {}
|
||||
|
||||
uchar **get_curr_association_ptr() { return &curr_matching_chain; }
|
||||
|
||||
/* Initialize the BKAH cache */
|
||||
int init();
|
||||
|
||||
enum Join_algorithm get_join_alg() { return BKAH_JOIN_ALG; }
|
||||
|
||||
/* Check index condition of the joined table for a record from BKAH cache */
|
||||
bool skip_index_tuple(char *range_info);
|
||||
};
|
||||
|
|
|
|||
Loading…
Reference in a new issue