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-rw-r--r--mysql-test/t/trigger.test13
1 files changed, 13 insertions, 0 deletions
diff --git a/mysql-test/t/trigger.test b/mysql-test/t/trigger.test
index 8ba21ed696a..e929b4b39cc 100644
--- a/mysql-test/t/trigger.test
+++ b/mysql-test/t/trigger.test
@@ -2426,6 +2426,19 @@ INSERT IGNORE INTO t2 SET a = '777';
DROP TRIGGER trg1;
DROP TABLE t1, t2;
+#
+# Bug #48525: trigger changes "Column 'id' cannot be null" behaviour
+#
+CREATE TABLE t1 (id INT NOT NULL);
+CREATE TABLE t2 (id INT NOT NULL);
+INSERT t1 VALUES (1),(2),(3);
+UPDATE t1 SET id=NULL;
+CREATE TRIGGER t1_bu BEFORE UPDATE ON t1 FOR EACH ROW
+ INSERT INTO t2 VALUES (3);
+UPDATE t1 SET id=NULL;
+DROP TRIGGER t1_bu;
+DROP TABLE t1,t2;
+
--echo End of 5.1 tests.