mysql-test/main/subselect_firstmatch.test


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#
# Test for semijoins that don't need to be run for a lot of combinations
#
--source include/have_sequence.inc

--echo #
--echo # Check that firstmatch works with HASH
--echo #

create table t1 (a int, b int);
insert into t1 select seq, seq from seq_1_to_10;

create table t2 (a int, b int);
insert into t2 select A.seq,A.seq from seq_1_to_10 A, seq_1_to_10 B;

set @save_join_cache_level=@@join_cache_level;
set join_cache_level=6;

explain select * from t1 where t1.a in (select t2.a from t2 where t1.b=t2.b);
select * from t1 where t1.a in (select t2.a from t2 where t1.b=t2.b);

set @@join_cache_level=@save_join_cache_level;

drop table t1,t2;

--echo #
--echo # End of 11.0 tests
--echo #