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BUG#629684: Unreachable code in multi_range_read.cc in maria-5.3-dsmrr-cpk

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- More test coverage
This commit is contained in:
Sergey Petrunya
2010-09-13 20:05:51 +04:00
parent 188de43db1
commit 7f41516f4f
2 changed files with 39 additions and 0 deletions
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23
mysql-test/r/myisam_mrr.result
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@ -413,4 +413,27 @@ explain select * from t1 where a < 20;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range a a 5 NULL 20 Using index condition; Using MRR
set optimizer_switch=@save_optimizer_switch;
#
# BUG#629684: Unreachable code in multi_range_read.cc in maria-5.3-dsmrr-cpk
#
delete from t0 where a > 2;
insert into t0 values (NULL),(NULL);
insert into t1 values (NULL, 1234), (NULL, 5678);
set @save_join_cache_level=@@join_cache_level;
set @@join_cache_level=6;
explain
select * from t0, t1 where t0.a<=>t1.a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 5
1 SIMPLE t1 ref a a 5 test.t0.a 1 Using index condition(BKA); Using join buffer
select * from t0, t1 where t0.a<=>t1.a;
a a b
0 0 0
1 1 1
2 2 2
NULL NULL 1234
NULL NULL 1234
NULL NULL 5678
NULL NULL 5678
set @@join_cache_level=@save_join_cache_level;
drop table t0, t1;