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MWL#89: Address review feedback (by Sergey Petrunia)

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mysql-test/r/subselect4.result:
  Moved test case for LP BUG#718593 into the correct test file subselect_mat_cost_bugs.test.
mysql-test/t/subselect4.test:
  Moved test case for LP BUG#718593 into the correct test file subselect_mat_cost_bugs.test.
This commit is contained in:
unknown
2011-05-23 10:56:05 +03:00
parent 56c0e19ed0
commit 742dfc92a2
11 changed files with 187 additions and 178 deletions
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70
mysql-test/r/subselect_mat_cost_bugs.result
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@@ -229,6 +229,72 @@ FROM t1 STRAIGHT_JOIN t2 ON t2.f3 = t1.f3
WHERE t2.f3 = 'c');
f2 f3
drop table t1,t2,t3;
#
# LP BUG#718593 Crash in substitute_for_best_equal_field -> eliminate_item_equal ->
# Item_field::find_item_equal -> Item_equal::contains
#
# LP BUG#718593 Crash in substitute_for_best_equal_field ->
# eliminate_item_equal -> Item_field::find_item_equal -> Item_equal::contains
set @save_optimizer_switch=@@optimizer_switch;
SET @@optimizer_switch = 'semijoin=off';
CREATE TABLE t1 ( f3 int(11), f10 varchar(1), f11 varchar(1)) ;
INSERT IGNORE INTO t1 VALUES (6,'f','f'),(2,'d','d');
CREATE TABLE t2 ( f12 int(11), f13 int(11)) ;
insert into t2 values (1,2), (3,4);
EXPLAIN
SELECT * FROM t2
WHERE ( f12 ) IN (
SELECT alias2.f3
FROM t1 AS alias1 JOIN t1 AS alias2 ON alias2.f10 = alias1.f11
WHERE alias1.f11 OR alias1.f3 = 50 AND alias1.f10
);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where
2 SUBQUERY alias1 ALL NULL NULL NULL NULL 2 Using where
2 SUBQUERY alias2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join)
SELECT * FROM t2
WHERE ( f12 ) IN (
SELECT alias2.f3
FROM t1 AS alias1 JOIN t1 AS alias2 ON alias2.f10 = alias1.f11
WHERE alias1.f11 OR alias1.f3 = 50 AND alias1.f10
);
f12 f13
EXPLAIN
SELECT * FROM t2
WHERE ( f12 ) IN (
SELECT alias2.f3
FROM t1 AS alias1, t1 AS alias2
WHERE (alias2.f10 = alias1.f11) AND (alias1.f11 OR alias1.f3 = 50 AND alias1.f10));
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where
2 SUBQUERY alias1 ALL NULL NULL NULL NULL 2 Using where
2 SUBQUERY alias2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join)
SELECT * FROM t2
WHERE ( f12 ) IN (
SELECT alias2.f3
FROM t1 AS alias1, t1 AS alias2
WHERE (alias2.f10 = alias1.f11) AND (alias1.f11 OR alias1.f3 = 50 AND alias1.f10));
f12 f13
set @@optimizer_switch=@save_optimizer_switch;
drop table t1, t2;
#
# MWL#89: test introduced after Sergey Petrunia's review - test that
# keyparts wihtout index prefix are used with the IN-EXISTS strategy.
#
create table t1 (c1 int);
insert into t1 values (1), (2), (3);
create table t2 (kp1 int, kp2 int, c2 int, filler char(100));
insert into t2 values (0,0,0,'filler'),(0,1,1,'filler'),(0,2,2,'filler'),(0,3,3,'filler');
create index key1 on t2 (kp1, kp2);
create index key2 on t2 (kp1);
create index key3 on t2 (kp2);
set session optimizer_switch='default';
analyze table t2;
Table Op Msg_type Msg_text
test.t2 analyze status OK
explain
select c1 from t1 where c1 in (select kp1 from t2 where kp2 = 10 and c2 = 4) or c1 > 7;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where
2 DEPENDENT SUBQUERY t2 index_subquery key1,key2,key3 key1 10 func,const 1 Using where
select c1 from t1 where c1 in (select kp1 from t2 where kp2 = 10 and c2 = 4) or c1 > 7;
c1
drop table t1, t2;