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Diffstat (limited to 'mysql-test/t/distinct.test')
| -rw-r--r-- | mysql-test/t/distinct.test | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/mysql-test/t/distinct.test b/mysql-test/t/distinct.test index 051499f465b..f1c120a313d 100644 --- a/mysql-test/t/distinct.test +++ b/mysql-test/t/distinct.test @@ -658,6 +658,31 @@ select time(f1) from t1 ; select distinct time(f1) from t1 ; drop table t1; +# +# MDEV-3875 Wrong result (missing row) on a DISTINCT query with the same subquery in the SELECT list and GROUP BY +# MySQL Bug#66896 Distinct not distinguishing 0 from NULL when GROUP BY is used +# +create table t1(i int, g int); # remove_dup_with_hash_index +insert into t1 values (null, 1), (0, 2); +select distinct i from t1 group by g; +drop table t1; + +create table t1(i int, g blob); # remove_dup_with_compare +insert into t1 values (null, 1), (0, 2); +select distinct i from t1 group by g; +drop table t1; + +create table t1 (a int) engine=myisam; +insert into t1 values (0),(7); +create table t2 (b int) engine=myisam; +insert into t2 values (7),(0),(3); +create algorithm=temptable view v as +select distinct (select max(a) from t1 where alias.b = a) as field1 from t2 as alias group by field1; +select * from v; +select distinct (select max(a) from t1 where alias.b = a) as field1 from t2 as alias group by field1; +drop view v; +drop table t1, t2; + --echo # --echo # Bug #11744875: 4082: integer lengths cause truncation with distinct concat and innodb --echo # |