diff options
Diffstat (limited to 'mysql-test/r/table_elim.result')
| -rw-r--r-- | mysql-test/r/table_elim.result | 93 |
1 files changed, 47 insertions, 46 deletions
diff --git a/mysql-test/r/table_elim.result b/mysql-test/r/table_elim.result index 3200ce392eb..892ac29d6d5 100644 --- a/mysql-test/r/table_elim.result +++ b/mysql-test/r/table_elim.result @@ -26,17 +26,17 @@ a explain select * from t1 left join t2 on t2.a=t1.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 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 +1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where # This will not be eliminated as t2.b is in in order list: explain select t1.a from t1 left join t2 on t2.a=t1.a order by t2.b; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using temporary; Using filesort -1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 +1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where # This will not be eliminated as t2.b is in group list: explain select t1.a from t1 left join t2 on t2.a=t1.a group by t2.b; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using temporary; Using filesort -1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 +1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where # This will not be eliminated as t2.b is in the WHERE explain select t1.a from t1 left join t2 on t2.a=t1.a where t2.b < 3 or t2.b is null; id select_type table type possible_keys key key_len ref rows Extra @@ -58,7 +58,7 @@ t0 left join (t1 left join (t2 join t3 on t2.b=t3.b) on t2.a=t1.a and t3.a=t1.a) on t0.a=t1.a; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t0 ALL NULL NULL NULL NULL 4 100.00 -1 SIMPLE t1 ALL NULL NULL NULL NULL 4 100.00 +1 SIMPLE t1 ALL NULL NULL NULL NULL 4 100.00 Using where Warnings: Note 1003 select `test`.`t0`.`a` AS `a` from `test`.`t0` left join (`test`.`t1`) on((`test`.`t1`.`a` = `test`.`t0`.`a`)) where 1 # Elimination with aggregate functions @@ -75,7 +75,7 @@ This must not use elimination: explain select count(1) from t1 left join t2 on t2.a=t1.a group by t2.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using temporary; Using filesort -1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using index +1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where; Using index drop table t0, t1, t2, t3; create table t0 ( id integer, primary key (id)); create table t1 ( @@ -117,58 +117,58 @@ t2 where id=f.id); This should use one table: explain select id from v1 where id=2; id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY f const PRIMARY PRIMARY 4 const 1 Using index +1 SIMPLE f const PRIMARY PRIMARY 4 const 1 Using index This should use one table: explain extended select id from v1 where id in (1,2,3,4); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY f range PRIMARY PRIMARY 4 NULL 4 100.00 Using where; Using index +1 SIMPLE f range PRIMARY PRIMARY 4 NULL 4 100.00 Using where; Using index Warnings: -Note 1276 Field or reference 'test.a2.id' of SELECT #3 was resolved in SELECT #1 +Note 1276 Field or reference 'test.a2.id' of SELECT #3 was resolved in SELECT #2 Note 1003 select `f`.`id` AS `id` from `test`.`t0` `f` where (`f`.`id` in (1,2,3,4)) This should use facts and a1 tables: explain extended select id from v1 where attr1 between 12 and 14; id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY a1 range PRIMARY,attr1 attr1 5 NULL 2 100.00 Using where -1 PRIMARY f eq_ref PRIMARY PRIMARY 4 test.a1.id 1 100.00 Using index +1 SIMPLE a1 range PRIMARY,attr1 attr1 5 NULL 2 100.00 Using where +1 SIMPLE f eq_ref PRIMARY PRIMARY 4 test.a1.id 1 100.00 Using index Warnings: -Note 1276 Field or reference 'test.a2.id' of SELECT #3 was resolved in SELECT #1 +Note 1276 Field or reference 'test.a2.id' of SELECT #3 was resolved in SELECT #2 Note 1003 select `f`.`id` AS `id` from `test`.`t0` `f` join `test`.`t1` `a1` where ((`f`.`id` = `a1`.`id`) and (`a1`.`attr1` between 12 and 14)) This should use facts, a2 and its subquery: explain extended select id from v1 where attr2 between 12 and 14; id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY a2 range PRIMARY,attr2 attr2 5 NULL 5 100.00 Using where -1 PRIMARY f eq_ref PRIMARY PRIMARY 4 test.a2.id 1 100.00 Using index +1 SIMPLE a2 range PRIMARY,attr2 attr2 5 NULL 5 100.00 Using where +1 SIMPLE f eq_ref PRIMARY PRIMARY 4 test.a2.id 1 100.00 Using index 3 DEPENDENT SUBQUERY t2 ref PRIMARY PRIMARY 4 test.a2.id 2 100.00 Using index Warnings: -Note 1276 Field or reference 'test.a2.id' of SELECT #3 was resolved in SELECT #1 +Note 1276 Field or reference 'test.a2.id' of SELECT #3 was resolved in SELECT #2 Note 1003 select `f`.`id` AS `id` from `test`.`t0` `f` join `test`.`t2` `a2` where ((`f`.`id` = `a2`.`id`) and (`a2`.`attr2` between 12 and 14) and (`a2`.`fromdate` = (select max(`test`.`t2`.`fromdate`) from `test`.`t2` where (`test`.`t2`.`id` = `a2`.`id`)))) This should use one table: explain select id from v2 where id=2; id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY f const PRIMARY PRIMARY 4 const 1 Using index +1 SIMPLE f const PRIMARY PRIMARY 4 const 1 Using index This should use one table: explain extended select id from v2 where id in (1,2,3,4); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY f range PRIMARY PRIMARY 4 NULL 4 100.00 Using where; Using index +1 SIMPLE f range PRIMARY PRIMARY 4 NULL 4 100.00 Using where; Using index Warnings: -Note 1276 Field or reference 'test.f.id' of SELECT #3 was resolved in SELECT #1 +Note 1276 Field or reference 'test.f.id' of SELECT #3 was resolved in SELECT #2 Note 1003 select `f`.`id` AS `id` from `test`.`t0` `f` where (`f`.`id` in (1,2,3,4)) This should use facts and a1 tables: explain extended select id from v2 where attr1 between 12 and 14; id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY a1 range PRIMARY,attr1 attr1 5 NULL 2 100.00 Using where -1 PRIMARY f eq_ref PRIMARY PRIMARY 4 test.a1.id 1 100.00 Using index +1 SIMPLE a1 range PRIMARY,attr1 attr1 5 NULL 2 100.00 Using where +1 SIMPLE f eq_ref PRIMARY PRIMARY 4 test.a1.id 1 100.00 Using index Warnings: -Note 1276 Field or reference 'test.f.id' of SELECT #3 was resolved in SELECT #1 +Note 1276 Field or reference 'test.f.id' of SELECT #3 was resolved in SELECT #2 Note 1003 select `f`.`id` AS `id` from `test`.`t0` `f` join `test`.`t1` `a1` where ((`f`.`id` = `a1`.`id`) and (`a1`.`attr1` between 12 and 14)) This should use facts, a2 and its subquery: explain extended select id from v2 where attr2 between 12 and 14; id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY a2 range PRIMARY,attr2 attr2 5 NULL 5 100.00 Using where -1 PRIMARY f eq_ref PRIMARY PRIMARY 4 test.a2.id 1 100.00 Using where; Using index +1 SIMPLE a2 range PRIMARY,attr2 attr2 5 NULL 5 100.00 Using where +1 SIMPLE f eq_ref PRIMARY PRIMARY 4 test.a2.id 1 100.00 Using where; Using index 3 DEPENDENT SUBQUERY t2 ref PRIMARY PRIMARY 4 test.f.id 2 100.00 Using index Warnings: -Note 1276 Field or reference 'test.f.id' of SELECT #3 was resolved in SELECT #1 +Note 1276 Field or reference 'test.f.id' of SELECT #3 was resolved in SELECT #2 Note 1003 select `f`.`id` AS `id` from `test`.`t0` `f` join `test`.`t2` `a2` where ((`f`.`id` = `a2`.`id`) and (`a2`.`attr2` between 12 and 14) and (`a2`.`fromdate` = (select max(`test`.`t2`.`fromdate`) from `test`.`t2` where (`test`.`t2`.`id` = `f`.`id`)))) drop view v1, v2; drop table t0, t1, t2; @@ -194,7 +194,7 @@ t2.pk3=t2.pk1+1 and t2.pk2=t2.pk3+t2.col; 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 ref PRIMARY PRIMARY 4 test.t1.a 1 +1 SIMPLE t2 ref PRIMARY PRIMARY 4 test.t1.a 1 Using where This must use only t1: explain select t1.* from t1 left join t2 on t2.pk2=t1.a and t2.pk1=t2.pk2+1 and @@ -212,19 +212,19 @@ explain select t1.* from t1 left join ( t2 left join t3 on t3.pk=t2.col) on t2.col=t1.col; 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 +1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where explain select t1.*, t2.* from t1 left join (t2 left join t3 on t3.pk=t2.col) on t2.pk=t1.col; 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 eq_ref PRIMARY PRIMARY 4 test.t1.col 1 +1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.col 1 Using where explain select t1.* from t1 left join ( t2 left join t3 on t3.pk=t2.col or t3.pk=t2.col) on t2.col=t1.col or t2.col=t1.col; 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 +1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where explain select t1.*, t2.* from t1 left join @@ -232,7 +232,7 @@ t1 left join on t2.pk=t1.col or t2.pk=t1.col; 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 eq_ref PRIMARY PRIMARY 4 test.t1.col 1 +1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.col 1 Using where drop table t1, t2, t3; # # Check things that look like functional dependencies but really are not @@ -247,12 +247,12 @@ this must not use table elimination: explain select t1.* from t1 left join t2 on t2.a='foo' collate latin1_general_ci; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index NULL PRIMARY 10 NULL 2 Using index -1 SIMPLE t2 index PRIMARY PRIMARY 10 NULL 2 Using index +1 SIMPLE t2 index PRIMARY PRIMARY 10 NULL 2 Using where; Using index this must not use table elimination: explain select t1.* from t1 left join t2 on t2.a=t1.a collate latin1_general_ci; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index NULL PRIMARY 10 NULL 2 Using index -1 SIMPLE t2 index PRIMARY PRIMARY 10 NULL 2 Using index +1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 2 Range checked for each record (index map: 0x1) drop table t1,t2; create table t1 (a int primary key); insert into t1 values (1),(2); @@ -262,21 +262,22 @@ this must not use table elimination: explain select t1.* from t1 left join t2 on t2.a=1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index NULL PRIMARY 4 NULL 2 Using index -1 SIMPLE t2 index PRIMARY PRIMARY 10 NULL 2 Using index +1 SIMPLE t2 index PRIMARY PRIMARY 10 NULL 2 Using where; Using index this must not use table elimination: explain select t1.* from t1 left join t2 on t2.a=t1.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index NULL PRIMARY 4 NULL 2 Using index -1 SIMPLE t2 index PRIMARY PRIMARY 10 NULL 2 Using index +1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 2 Range checked for each record (index map: 0x1) drop table t1, t2; create table t1 (a char(10) primary key); insert into t1 values ('foo'),('bar'); create table t2 (a char(10), unique key(a(2))); -insert into t2 values ('foo'),('bar'); +insert into t2 values +('foo'),('bar'),('boo'),('car'),('coo'),('par'),('doo'),('tar'); explain select t1.* from t1 left join t2 on t2.a=t1.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index NULL PRIMARY 10 NULL 2 Using index -1 SIMPLE t2 ref a a 3 test.t1.a 2 +1 SIMPLE t2 ref a a 3 test.t1.a 2 Using where drop table t1, t2; # # check UPDATE/DELETE that look like they could be eliminated @@ -322,19 +323,19 @@ id select_type table type possible_keys key key_len ref rows Extra explain select t1.a from t1 left join t2 on t2.pk=t1.a or 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 4 -1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 2 +1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 2 Using where explain select t1.a from t1 left join t2 on t2.b<t1.b or t2.pk=t1.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 PRIMARY NULL NULL NULL 2 +1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 2 Using where explain select t1.a from t1 left join t2 on t2.pk between 10 and 20; 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 index PRIMARY PRIMARY 4 NULL 2 Using index +1 SIMPLE t2 index PRIMARY PRIMARY 4 NULL 2 Using where; Using index explain select t1.a from t1 left join t2 on t2.pk between 0.5 and 1.5; 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 index PRIMARY PRIMARY 4 NULL 2 Using index +1 SIMPLE t2 index PRIMARY PRIMARY 4 NULL 2 Using where; Using index explain select t1.a from t1 left join t2 on t2.pk between 10 and 10; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 @@ -347,7 +348,7 @@ id select_type table type possible_keys key key_len ref rows Extra explain select t1.a from t1 left join t2 on TRUE; 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 index NULL PRIMARY 4 NULL 2 Using index +1 SIMPLE t2 index NULL PRIMARY 4 NULL 2 Using where; Using index explain select t1.a from t1 left join t3 on t3.pk1=t1.a and t3.pk2 IS NULL; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 @@ -388,7 +389,7 @@ on (t2.pk=t2.c and t2.b=t1.a and t2.c=t1.b) or where t1.d=1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using where -1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 +1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 Using where explain select t1.* from @@ -405,7 +406,7 @@ select t1.* from t1 left join t2 on t2.pk=3 or t2.pk= 4; 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 index PRIMARY PRIMARY 4 NULL 2 Using index +1 SIMPLE t2 index PRIMARY PRIMARY 4 NULL 2 Using where; Using index explain select t1.* from t1 left join t2 on t2.pk=3 or t2.pk= 3; @@ -560,9 +561,9 @@ JOIN t5 ON t4.f3 ON t3.f1 = t5.f5 ON t2.f4 = t3.f4 WHERE t3.f2 ; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where -1 SIMPLE t5 ref f5 f5 5 test.t3.f1 2 Using index -1 SIMPLE t4 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL f4 NULL NULL NULL 11 Using where; Using join buffer +1 SIMPLE t5 ref f5 f5 5 test.t3.f1 2 Using where; Using index +1 SIMPLE t4 ALL NULL NULL NULL NULL 3 Using where +1 SIMPLE t2 ALL f4 NULL NULL NULL 11 Using where; Using join buffer (flat, BNL join) # ^^ The above must not produce a QEP of t3,t5,t2,t4 # as that violates the "no interleaving of outer join nests" rule. DROP TABLE t1,t2,t3,t4,t5; @@ -581,7 +582,7 @@ NULL NULL EXPLAIN SELECT alias1.* FROM t3 LEFT JOIN v1 as alias1 ON ( t3.a = alias1.b ); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 system NULL NULL NULL NULL 1 -1 SIMPLE t1 ALL NULL NULL NULL NULL 1 -1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using index +1 SIMPLE t1 ALL NULL NULL NULL NULL 1 Using where +1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where; Using index drop view v1; DROP TABLE t1,t2,t3; |