diff options
Diffstat (limited to 'mysql-test/t')
| -rw-r--r-- | mysql-test/t/cte_nonrecursive.test | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/mysql-test/t/cte_nonrecursive.test b/mysql-test/t/cte_nonrecursive.test index 980bff01694..57b7ae1658f 100644 --- a/mysql-test/t/cte_nonrecursive.test +++ b/mysql-test/t/cte_nonrecursive.test @@ -724,3 +724,22 @@ deallocate prepare stmt2; drop view v1,v2; drop table t1,t2; + +--echo # +--echo # MDEV-13796: UNION of two materialized CTEs +--echo # + +CREATE TABLE t1 (id int, k int); +CREATE TABLE t2 (id int); +INSERT INTO t1 VALUES (3,5), (1,7), (4,3); +INSERT INTO t2 VALUES (4), (3), (2); + +let $q= +WITH d1 AS (SELECT SUM(k) FROM t1, t2 as t2 WHERE t1.id = t2.id), + d2 AS (SELECT SUM(k) FROM t1, t2 as t2 WHERE t1.id = t2.id) +SELECT * FROM d1 UNION SELECT * FROM d2; + +eval $q; +eval explain $q; + +DROP TABLE t1,t2; |