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MWL#90: address review feedback: more test coverage

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This commit is contained in:
Sergey Petrunya 2011-04-05 11:02:49 +04:00
parent 8fb724281e
commit af3c1dc508
2 changed files with 66 additions and 0 deletions
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32
mysql-test/r/subselect_sj_mat.result
View File

@ -1324,3 +1324,35 @@ 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;

34
mysql-test/t/subselect_sj_mat.test
View File

@ -936,3 +936,37 @@ update t1 set a=123;
execute s;
drop table t0, t1;
set optimizer_switch='firstmatch=on';
--echo #
--echo # MWL#90, review feedback: check what happens when the subquery
--echo # looks like candidate for MWL#90 checking at the first glance
--echo # but then subselect_hash_sj_engine::init_permanent() discovers
--echo # that it's not possible to perform duplicate removal for the
--echo # selected datatypes, and so materialization isn't applicable after
--echo # all.
--echo #
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');
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');
drop table t1_1024, t2_1024;