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Diffstat (limited to 'mysql-test/t/having.test')
| -rw-r--r-- | mysql-test/t/having.test | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/mysql-test/t/having.test b/mysql-test/t/having.test index 827b83f11a0..adabbb711d4 100644 --- a/mysql-test/t/having.test +++ b/mysql-test/t/having.test @@ -432,3 +432,14 @@ select f1 from t1 having max(f1)=f1; select f1 from t1 group by f1 having max(f1)=f1; set session sql_mode=''; drop table t1; + + +# +# Bug #38637: COUNT DISTINCT prevents NULL testing in HAVING clause +# +CREATE TABLE t1 ( a INT, b INT); +INSERT INTO t1 VALUES (1, 1), (2,2), (3, NULL); +SELECT b, COUNT(DISTINCT a) FROM t1 GROUP BY b HAVING b is NULL; +DROP TABLE t1; + +--echo End of 5.0 tests |