#
# Check that firstmatch works with HASH
#
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);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	10	Using where
1	PRIMARY	t2	hash_ALL	NULL	#hash#$hj	10	test.t1.a,test.t1.b	100	Using where; FirstMatch(t1); Using join buffer (flat, BNLH join)
select * from t1 where t1.a in (select t2.a from t2 where t1.b=t2.b);
a	b
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
set @@join_cache_level=@save_join_cache_level;
drop table t1,t2;
#
# End of 11.0 tests
#