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MWL#90: address review feedback: more test coverage

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- Forgot to add .result file
This commit is contained in:
Sergey Petrunya 2011-04-05 11:16:28 +04:00
parent af3c1dc508
commit 409902f884
1 changed files with 32 additions and 0 deletions
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32
mysql-test/r/subselect_mat.result
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@ -1286,6 +1286,38 @@ a a in (select a from t1)
2 0
drop table t0, t1;
set optimizer_switch='firstmatch=on';
#
# MWL#90, review feedback: check what happens when the subquery
# looks like candidate for MWL#90 checking at the first glance
# but then subselect_hash_sj_engine::init_permanent() discovers
# that it's not possible to perform duplicate removal for the
# selected datatypes, and so materialization isn't applicable after
# all.
#
set @blob_len = 1024;
set @suffix_len = @blob_len - @prefix_len;
create table t1_1024 (a1 blob(1024), a2 blob(1024));
create table t2_1024 (b1 blob(1024), b2 blob(1024));
insert into t1_1024 values
(concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len)));
insert into t1_1024 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t1_1024 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_1024 values
(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len)));
insert into t2_1024 values
(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len)));
insert into t2_1024 values
(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len)));
explain select left(a1,7), left(a2,7) from t1_1024 where (a1,3) in (select substring(b1,1,1024), count(*) from t2_1024 where b1 > '0');
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 Using where
2 DEPENDENT SUBQUERY t2_1024 ALL NULL NULL NULL NULL 3 Using where
select left(a1,7), left(a2,7) from t1_1024 where (a1,3) in (select substring(b1,1,1024), count(*) from t2_1024 where b1 > '0');
left(a1,7) left(a2,7)
1 - 01x 2 - 01x
drop table t1_1024, t2_1024;
set @@optimizer_switch=default;
create table t0 (a int);
insert into t0 values (0),(1),(2);