MDEV-9374 having '2015-01-01 01:00:00.000001' > coalesce(NULL) returns true

Alexander Barkov · Alexander Barkov · commit 0a50e43e9df2 · 2016-06-16T14:57:32.000+04:00
The problem was earlier fixed by the patch for MDEV-9521.
Adding tests only.
diff --git a/mysql-test/r/type_datetime.result b/mysql-test/r/type_datetime.result
@@ -834,5 +834,13 @@ a	b	a	b
 DEALLOCATE PREPARE stmt1;
 DROP TABLE t1,t2;
 #
+# MDEV-9374 having '2015-01-01 01:00:00.000001' > coalesce(NULL) returns true
+#
+CREATE TABLE t1 (c1 DATETIME(0));
+INSERT INTO t1 VALUES (NULL);
+SELECT * FROM t1 HAVING '2015-01-01 01:00:00.000001' > COALESCE(c1);
+c1
+DROP TABLE t1;
+#
 # End of 5.5 tests
 #
diff --git a/mysql-test/t/type_datetime.test b/mysql-test/t/type_datetime.test
@@ -610,6 +610,14 @@ EXECUTE stmt1;
 DEALLOCATE PREPARE stmt1;
 DROP TABLE t1,t2;
 
+--echo #
+--echo # MDEV-9374 having '2015-01-01 01:00:00.000001' > coalesce(NULL) returns true
+--echo #
+CREATE TABLE t1 (c1 DATETIME(0));
+INSERT INTO t1 VALUES (NULL);
+SELECT * FROM t1 HAVING '2015-01-01 01:00:00.000001' > COALESCE(c1);
+DROP TABLE t1;
+
 --echo #
 --echo # End of 5.5 tests
 --echo #

Original file line number	Diff line number	Diff line change
`@@ -834,5 +834,13 @@ a b a b`
`834`	`834`	`DEALLOCATE PREPARE stmt1;`
`835`	`835`	`DROP TABLE t1,t2;`
`836`	`836`	`#`
	`837`	`+# MDEV-9374 having '2015-01-01 01:00:00.000001' > coalesce(NULL) returns true`
	`838`	`+#`
	`839`	`+CREATE TABLE t1 (c1 DATETIME(0));`
	`840`	`+INSERT INTO t1 VALUES (NULL);`
	`841`	`+SELECT * FROM t1 HAVING '2015-01-01 01:00:00.000001' > COALESCE(c1);`
	`842`	`+c1`
	`843`	`+DROP TABLE t1;`
	`844`	`+#`
`837`	`845`	`# End of 5.5 tests`
`838`	`846`	`#`