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MDEV-10120: Wrong result of UNION .. ORDER BY GROUP_CONCAT()

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Reject queries that have aggregate functions with UNION as these
are not allowed by standard.
This commit is contained in:
Varun Gupta
2020-07-09 14:01:06 +05:30
parent a759f9af51
commit 737c3025e9
5 changed files with 53 additions and 34 deletions
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15
mysql-test/r/parser.result
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@ -943,11 +943,9 @@ ERROR 42000: You have an error in your SQL syntax; check the manual that corresp
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (10),(20),(30);
SELECT 1 AS a UNION SELECT a FROM t1 GROUP BY a ORDER BY GROUP_CONCAT(a);
a
1
ERROR HY000: Expression #1 of ORDER BY contains aggregate function and applies to a UNION
SELECT 1 AS a UNION SELECT a FROM t1 GROUP BY a ORDER BY GROUP_CONCAT(a ORDER BY a);
a
1
ERROR HY000: Expression #1 of ORDER BY contains aggregate function and applies to a UNION
DROP TABLE t1;
# UNION with a parenthesed term
CREATE TABLE t1 (a INT);
@ -1010,14 +1008,11 @@ DROP TABLE t1;
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (10),(20),(30);
SELECT 1 AS a UNION SELECT a FROM t1 GROUP BY a WITH ROLLUP ORDER BY GROUP_CONCAT(a);
a
1
ERROR HY000: Expression #1 of ORDER BY contains aggregate function and applies to a UNION
SELECT 1 AS a UNION SELECT a FROM t1 GROUP BY a WITH ROLLUP ORDER BY GROUP_CONCAT(a ORDER BY a);
a
1
ERROR HY000: Expression #1 of ORDER BY contains aggregate function and applies to a UNION
SELECT 1 AS a UNION SELECT a FROM t1 GROUP BY a WITH ROLLUP ORDER BY GROUP_CONCAT(a ORDER BY a) LIMIT 1;
a
1
ERROR HY000: Expression #1 of ORDER BY contains aggregate function and applies to a UNION
DROP TABLE t1;
# Derived table with ROLLUP
CREATE TABLE t1 (a INT);