Bug#27006: AFTER UPDATE triggers not fired with INSERT ... ON DUPLICATE KEY

UPDATE if the row wasn't actually changed.

This bug was caused by fix for bug#19978. It causes AFTER UPDATE triggers
not firing if a row wasn't actually changed by the update part of the
INSERT .. ON DUPLICATE KEY UPDATE.

Now triggers are always fired if a row is touched by the INSERT ... ON
DUPLICATE KEY UPDATE.


sql/sql_insert.cc:
  Bug#27006: AFTER UPDATE triggers not fired with INSERT ... ON DUPLICATE KEY
  UPDATE if the row wasn't actually changed.
  Now triggers are always fired if a row is touched by the INSERT ... ON
  DUPLICATE KEY UPDATE.
mysql-test/r/trigger.result:
  Added a test case for the bug#27006: AFTER UPDATE triggers not fired with INSERT ... ON DUPLICATE KEY
  UPDATE if the row wasn't actually changed.
mysql-test/t/trigger.test:
  Added a test case for the bug#27006: AFTER UPDATE triggers not fired with INSERT ... ON DUPLICATE KEY
  UPDATE if the row wasn't actually changed.

1 files changed, 38 insertions, 0 deletions

diff --git a/mysql-test/t/trigger.test b/mysql-test/t/trigger.test
index 5c95004c901..49b7b527bd9 100644
--- a/mysql-test/t/trigger.test
+++ b/mysql-test/t/trigger.test
@@ -1699,4 +1699,42 @@ DROP TABLE bug22580_t1;
 DROP PROCEDURE bug22580_proc_1;
 DROP PROCEDURE bug22580_proc_2;
 
+#
+# Bug#27006: AFTER UPDATE triggers not fired with INSERT ... ON DUPLICATE KEY
+#            UPDATE if the row wasn't actually changed.
+#
+--disable_warnings
+DROP TRIGGER IF EXISTS trg27006_a_update;
+DROP TRIGGER IF EXISTS trg27006_a_insert;
+--enable_warnings
+
+CREATE TABLE t1 (
+  `id` int(10) unsigned NOT NULL auto_increment,
+  `val` varchar(10) NOT NULL,
+  PRIMARY KEY  (`id`)
+);
+CREATE TABLE t2 like t1;
+DELIMITER |;
+
+CREATE TRIGGER trg27006_a_insert AFTER INSERT ON t1 FOR EACH ROW
+BEGIN
+    insert into t2 values (NULL,new.val);
+END |
+CREATE TRIGGER trg27006_a_update AFTER UPDATE ON t1 FOR EACH ROW
+BEGIN
+    insert into t2 values (NULL,new.val);
+END |
+DELIMITER ;|
+
+INSERT INTO t1(val) VALUES ('test1'),('test2');
+SELECT * FROM t1;
+SELECT * FROM t2;
+INSERT INTO t1 VALUES (2,'test2') ON DUPLICATE KEY UPDATE val=VALUES(val);
+INSERT INTO t1 VALUES (3,'test3') ON DUPLICATE KEY UPDATE val=VALUES(val);
+SELECT * FROM t1;
+SELECT * FROM t2;
+DROP TRIGGER trg27006_a_insert;
+DROP TRIGGER trg27006_a_update;
+drop table t1,t2;
+
 --echo End of 5.0 tests