MDEV-15208: server crashed, when using ORDER BY with window function and UNION

Varun Gupta · spetrunia · commit 647e95231574 · 2022-02-22T06:38:40.000+03:00
(Edits by SergeiP: fix encryption.tempfiles_encrypted, re-word comment) Global ORDER BY clause of a UNION may not refer to 1) aggregate functions or 2) window functions. setup_order() checked for #1 but not for #2.
diff --git a/mysql-test/suite/encryption/r/tempfiles_encrypted.result b/mysql-test/suite/encryption/r/tempfiles_encrypted.result
@@ -4236,6 +4236,14 @@ i	LAST_VALUE(COUNT(i)) OVER (PARTITION BY i ORDER BY j)
 4	2
 DROP TABLE t1;
 #
+# MDEV-15208: server crashed, when using ORDER BY with window function and UNION
+#
+CREATE TABLE t1 (a INT);
+INSERT INTO t1 VALUES (1),(1),(1),(1),(1),(2),(2),(2),(2),(2),(2);
+SELECT 1 UNION SELECT a FROM t1 ORDER BY (row_number() over ());
+ERROR HY000: Expression #1 of ORDER BY contains aggregate function and applies to a UNION
+DROP TABLE t1;
+#
 # End of 10.2 tests
 #
 #

Original file line number	Diff line number	Diff line change
`@@ -4236,6 +4236,14 @@ i LAST_VALUE(COUNT(i)) OVER (PARTITION BY i ORDER BY j)`
`4236`	`4236`	`4 2`
`4237`	`4237`	`DROP TABLE t1;`
`4238`	`4238`	`#`
	`4239`	`+# MDEV-15208: server crashed, when using ORDER BY with window function and UNION`
	`4240`	`+#`
	`4241`	`+CREATE TABLE t1 (a INT);`
	`4242`	`+INSERT INTO t1 VALUES (1),(1),(1),(1),(1),(2),(2),(2),(2),(2),(2);`
	`4243`	`+SELECT 1 UNION SELECT a FROM t1 ORDER BY (row_number() over ());`
	`4244`	`+ERROR HY000: Expression #1 of ORDER BY contains aggregate function and applies to a UNION`
	`4245`	`+DROP TABLE t1;`
	`4246`	`+#`
`4239`	`4247`	`# End of 10.2 tests`
`4240`	`4248`	`#`
`4241`	`4249`	`#`