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MWL#128: Added into EXPLAIN output info about types of the used join buffers and

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about the employed join algorithms.
Refactored constructors of the JOIN_CACHE* classes.
This commit is contained in:
Igor Babaev 2010-10-18 13:33:05 -07:00
commit 25f5debdc7
65 changed files with 1072 additions and 995 deletions
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4
mysql-test/r/func_group.result
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@ -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 4 Using where; Using index; Using join buffer
1 SIMPLE t2 range k1 k1 3 NULL 4 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 range k2 k2 4 NULL 6 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');