mirror of
https://github.com/MariaDB/server.git
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337 lines
14 KiB
Text
337 lines
14 KiB
Text
set join_cache_level=2;
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drop table if exists t0,t1,t2,t3;
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create table t0 (a int) engine=myisam;
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INSERT INTO t0 VALUES (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
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create table t1 (a int) engine=myisam;
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INSERT INTO t1 select * from t0;
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# Try a few basic selects to see that r_rows and r_filtered columns work
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analyze select * from t1;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 100.00
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analyze select * from t1 where a<5;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 50.00 Using where
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analyze select * from t1 where a>100;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 0.00 Using where
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# ANALYZE DELETE will delete rows:
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analyze delete from t1 where a in (2,3,4);
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 30.00 Using where
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select * from t1;
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a
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0
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1
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5
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6
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7
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8
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9
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drop table t1;
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# ANALYZE UPDATE will make updates:
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create table t1(a int, b int);
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insert into t1 select a,a from t0;
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analyze update t1 set b=100+b where a in (6,7,8);
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 30.00 Using where
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select * from t1;
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a b
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0 0
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1 1
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2 2
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3 3
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4 4
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5 5
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6 106
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7 107
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8 108
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9 9
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drop table t1;
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# Check that UNION works
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create table t1(a int, b int);
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insert into t1 select a,a from t0;
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analyze (select * from t1 A where a<5) union (select * from t1 B where a in (5,6));
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PRIMARY A ALL NULL NULL NULL NULL 10 10.00 100.00 50.00 Using where
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2 UNION B ALL NULL NULL NULL NULL 10 10.00 100.00 20.00 Using where
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NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL 7.00 NULL NULL
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analyze (select * from t1 A where a<5) union (select * from t1 B where a in (1,2));
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PRIMARY A ALL NULL NULL NULL NULL 10 10.00 100.00 50.00 Using where
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2 UNION B ALL NULL NULL NULL NULL 10 10.00 100.00 20.00 Using where
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NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL 5.00 NULL NULL
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drop table t1;
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drop table t0;
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#
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# Try a subquery.
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#
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create table t0 (a int, b int);
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insert into t0 values
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(0,0),(1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
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create table t1 (a int, b int);
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insert into t1 values (1,1),(2,2),(3,3);
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# See .test file for the right values of r_rows and r_filtered.
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analyze select a, a in (select t0.b from t0 where t0.b+1=t1.b+1) from t1;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 3 3.00 100.00 100.00
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2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 10 3.00 100.00 33.33 Using where
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# Try a subquery that is never executed
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analyze select a, a in (select t0.b from t0 where t0.b+1=t1.b+1) from t1 where t1.a > 5;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 3 3.00 100.00 0.00 Using where
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2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 10 NULL 100.00 NULL Using where
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drop table t0, t1;
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#
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# Tests for join buffering
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#
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create table t0 (a int, b int);
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insert into t0 values
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(0,0),(1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
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create table t1 like t0;
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insert into t1 select * from t0;
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explain select * from t0, t1 where t0.a<5 and t1.a<5;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 ALL NULL NULL NULL NULL 10 Using where
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1 SIMPLE t1 ALL NULL NULL NULL NULL 10 Using where; Using join buffer (flat, BNL join)
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# These should have filtered=50
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analyze select * from t0, t1 where t0.a<5 and t1.a<5;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t0 ALL NULL NULL NULL NULL 10 10.00 100.00 50.00 Using where
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1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 50.00 Using where; Using join buffer (flat, BNL join)
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explain select * from t0, t1 where t0.a<5 and t1.b=t0.b;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 ALL NULL NULL NULL NULL 10 Using where
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1 SIMPLE t1 ALL NULL NULL NULL NULL 10 Using where; Using join buffer (flat, BNL join)
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# Now, t1 should have filtered=10
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analyze select * from t0, t1 where t0.a<5 and t1.b=t0.b;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t0 ALL NULL NULL NULL NULL 10 10.00 100.00 50.00 Using where
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1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 10.00 Using where; Using join buffer (flat, BNL join)
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explain select * from t0, t1 where t0.a<5 and t1.a<5 and t1.b=t0.b;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 ALL NULL NULL NULL NULL 10 Using where
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1 SIMPLE t1 ALL NULL NULL NULL NULL 10 Using where; Using join buffer (flat, BNL join)
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# Now, t1 should have filtered=10
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analyze select * from t0, t1 where t0.a<5 and t1.a<5 and t1.b=t0.b;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t0 ALL NULL NULL NULL NULL 10 10.00 100.00 50.00 Using where
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1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 10.00 Using where; Using join buffer (flat, BNL join)
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# TODO: Check what is counted for "range checked for each record".
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#
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# Test for joins
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#
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create table t2 (key1 int, key2x int, col1 int, key(key1), key(key2x));
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insert into t2 select A.a + 10 *B.a +100 * C.a,
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(A.a + 10 *B.a +100 * C.a)*2,
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A.a + 10 *B.a +100 * C.a
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from t0 A, t0 B, t0 C;
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# This always has matches, filtered=100%.
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analyze select * from t1,t2 where t2.key1=t1.a;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 100.00 Using where
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1 SIMPLE t2 ref key1 key1 5 test.t1.a 1 1.00 100.00 100.00
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# This shows r_rows=0. It is actually 0.5 (should r_rows be changed to double?)
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analyze select * from t1,t2 where t2.key2x=t1.a;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 100.00 Using where
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1 SIMPLE t2 ref key2x key2x 5 test.t1.a 1 0.50 100.00 100.00
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select * from t1,t2 where t2.key2x=t1.a;
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a b key1 key2x col1
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0 0 0 0 0
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2 2 1 2 1
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4 4 2 4 2
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6 6 3 6 3
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8 8 4 8 4
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# This has t2.filtered=40% (there are 5 values: {0,1,2,3,4}. two of them have mod=0)
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analyze select * from t1,t2 where t2.key2x=t1.a and mod(t2.col1,4)=0;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 100.00 Using where
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1 SIMPLE t2 ref key2x key2x 5 test.t1.a 1 0.50 100.00 40.00 Using where
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drop table t0,t1,t2;
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#
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# Check non-merged derived tables
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#
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create table t0 (a int, b int);
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insert into t0 values
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(0,0),(1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
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update t0 set b=b/3;
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analyze select * from (select count(*),max(a),b from t0 group by b) T;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 10 4.00 100.00 100.00
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2 DERIVED t0 ALL NULL NULL NULL NULL 10 10.00 100.00 100.00 Using temporary; Using filesort
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drop table t0;
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#
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# Check ORDER/GROUP BY
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#
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create table t0 (a int, b int);
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insert into t0 values
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(0,0),(1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
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analyze select count(*),max(a),b from t0 where a<7 group by b;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t0 ALL NULL NULL NULL NULL 10 10.00 100.00 70.00 Using where; Using temporary; Using filesort
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drop table t0;
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#
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# Check multi-table UPDATE/DELETE.
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#
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create table t0 (a int, b int);
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create table t1 (a int, b int);
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insert into t0 values (0,0),(2,2),(4,4), (8,8);
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insert into t1 values (0,0),(2,2), (6,6);
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analyze select * from t0,t1 where t0.a=t1.a;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 3 3.00 100.00 100.00
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1 SIMPLE t0 ALL NULL NULL NULL NULL 4 4.00 100.00 16.67 Using where; Using join buffer (flat, BNL join)
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analyze update t0,t1 set t1.b=5555 where t0.a=t1.a;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 3 3.00 100.00 100.00
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1 SIMPLE t0 ALL NULL NULL NULL NULL 4 4.00 100.00 16.67 Using where
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select * from t1;
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a b
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0 5555
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2 5555
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6 6
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analyze delete t1 from t1, t0 where t0.a=t1.a;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 3 3.00 100.00 100.00
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1 SIMPLE t0 ALL NULL NULL NULL NULL 4 4.00 100.00 16.67 Using where
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select * from t1;
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a b
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6 6
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drop table t0, t1;
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#
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# MDEV-6393: ANALYZE SELECT crashes in Explain_query::print_explain with a non-existing column
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#
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create table t1 (i int);
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insert into t1 values (1),(2);
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analyze select a from t1;
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ERROR 42S22: Unknown column 'a' in 'SELECT'
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analyze delete from t1 where a=2;
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ERROR 42S22: Unknown column 'a' in 'WHERE'
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analyze update t1 set a=2;
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ERROR 42S22: Unknown column 'a' in 'SET'
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create table t2 like t1;
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insert into t2 select * from t1;
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analyze update t2,t1 set t2.i=5 where t2.a=t1.a;
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ERROR 42S22: Unknown column 't2.a' in 'WHERE'
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analyze delete t1 from t2,t1 where t2.a=t1.a;
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ERROR 42S22: Unknown column 't2.a' in 'WHERE'
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drop table t1, t2;
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#
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# MDEV-6395: ANALYZE UPDATE/DELETE with impossible where does not produce any output
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#
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create table t1 (a int, b int, key(a));
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insert into t1 values (1,1),(2,2),(3,3),(4,4),(5,5);
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analyze delete from t1 where 1 > 2;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
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analyze delete from t1 where a > 30 and a < 10;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
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analyze update t1 set b=12345 where 1 > 2;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
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analyze update t1 set b=12345 where a > 30 and a < 10;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
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drop table t1;
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#
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# MDEV-6398: ANALYZE UPDATE does not populate r_rows
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#
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create table t1 (i int);
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insert into t1 values (1),(2),(3),(4);
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analyze update t1 set i=8;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 4 4.00 100.00 100.00
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drop table t1;
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#
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# Check ANALYZE SELECT INTO
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#
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create table t1 (i int);
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insert into t1 values (1);
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analyze select * into @var from t1 ;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t1 system NULL NULL NULL NULL 1 NULL 100.00 NULL
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drop table t1;
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#
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# MDEV-6394: ANALYZE DELETE .. RETURNING fails with ERROR 2027 Malformed packet
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#
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create table t1 (i int);
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analyze delete from t1 returning *;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 0 0.00 100.00 100.00
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drop table t1;
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#
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# MDEV-6396: ANALYZE INSERT/REPLACE is accepted, but does not produce a plan
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#
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create table t1 (a int primary key, b int);
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analyze insert into t1 values (1,1);
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 INSERT t1 ALL NULL NULL NULL NULL NULL NULL 100.00 100.00 NULL
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select * from t1;
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a b
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1 1
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analyze replace t1 values (1,2);
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 INSERT t1 ALL NULL NULL NULL NULL NULL NULL 100.00 100.00 NULL
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select * from t1;
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a b
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1 2
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drop table t1;
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#
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# MDEV-6400 "ANALYZE SELECT ... INTO @var" doesn't set @var
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#
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create table t1(a int);
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insert into t1 values (1),(2);
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analyze select a into @var from t1 where a <2 ;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 2 2.00 100.00 50.00 Using where
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analyze select a into @var from t1 ;
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ERROR 42000: Result consisted of more than one row
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analyze insert into t1 select * from t1;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 2 2.00 100.00 100.00 Using temporary
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analyze select * into outfile '../../tmp/data1.tmp' from t1;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 4 4.00 100.00 100.00
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drop table t1;
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#
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# MDEV-7024: Assertion `! is_set()' failed in
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# Diagnostics_area::set_eof_status on executing ANALYZE SELECT via PS
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#
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create table t1(a int);
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prepare stmt from "analyze select * from t1";
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execute stmt;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL no matching row in const table
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drop table t1;
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#
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# MDEV-7674: ANALYZE shows r_rows=0
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#
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create table t1(a int);
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insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
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create table t2 (a int, key(a));
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insert into t2 values (0),(1);
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analyze select * from t1 straight_join t2 force index(a) where t2.a=t1.a;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 100.00 Using where
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1 SIMPLE t2 ref a a 5 test.t1.a 2 0.20 100.00 100.00 Using index
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drop table t1,t2;
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#
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# MDEV-8063: Unconditional ANALYZE DELETE does not delete rows
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#
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create table t1 (i int);
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insert into t1 values (1),(2);
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analyze delete from t1;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL 2 NULL NULL NULL Deleting all rows
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select * from t1;
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i
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insert into t1 values (1),(2);
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explain delete from t1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL 2 Deleting all rows
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select * from t1;
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i
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1
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2
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drop table t1;
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