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Diffstat (limited to 'mysql-test/t/myisam.test')
| -rw-r--r-- | mysql-test/t/myisam.test | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/mysql-test/t/myisam.test b/mysql-test/t/myisam.test index 298a8b1b61b..e6d47b5c570 100644 --- a/mysql-test/t/myisam.test +++ b/mysql-test/t/myisam.test @@ -502,3 +502,12 @@ alter table t1 disable keys; show keys from t1; drop table t1,t2; +# +# index search for NULL in blob. Bug #4816 +# +create table t1 ( a tinytext, b char(1), index idx (a(1),b) ); +insert into t1 values (null,''), (null,''); +explain select count(*) from t1 where a is null; +select count(*) from t1 where a is null; +drop table t1; + |