Merge mysql.com:/home/hf/work/27957/my50-27957

into  mysql.com:/home/hf/work/27957/my51-27957


mysql-test/r/insert_update.result:
  Auto merged
mysql-test/t/insert_update.test:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/sql_insert.cc:
  Auto merged
mysql-test/include/mix1.inc:
  merging
mysql-test/r/innodb_mysql.result:
  SCCS merged
sql/sql_select.cc:
  merging

1 files changed, 26 insertions, 0 deletions

diff --git a/mysql-test/t/insert_update.test b/mysql-test/t/insert_update.test
index de4e73dca93..ff6ddf35c7b 100644
--- a/mysql-test/t/insert_update.test
+++ b/mysql-test/t/insert_update.test
@@ -264,3 +264,29 @@ INSERT  INTO t1 (c1) VALUES ('A'), ('X'), ('Y'), ('Z')
   ON DUPLICATE KEY UPDATE cnt=cnt+1;
 SELECT * FROM t1;
 DROP TABLE t1;
+
+#
+# Bug#28000: INSERT IGNORE ... SELECT ... ON DUPLICATE
+# with erroneous UPDATE: NOT NULL field with NULL value.
+#
+CREATE TABLE t1 (
+  id INT AUTO_INCREMENT PRIMARY KEY,
+  c1 INT NOT NULL,
+  cnt INT DEFAULT 1
+);
+INSERT INTO t1 (id,c1) VALUES (1,10);
+SELECT * FROM t1;
+CREATE TABLE t2 (id INT, c1 INT);
+INSERT INTO t2 VALUES (1,NULL), (2,2);
+--error 1048
+INSERT INTO t1 (id,c1) SELECT 1,NULL
+  ON DUPLICATE KEY UPDATE c1=NULL;
+SELECT * FROM t1;
+INSERT IGNORE INTO t1 (id,c1) SELECT 1,NULL
+  ON DUPLICATE KEY UPDATE c1=NULL, cnt=cnt+1;
+SELECT * FROM t1;
+INSERT IGNORE INTO t1 (id,c1) SELECT * FROM t2
+  ON DUPLICATE KEY UPDATE c1=NULL, cnt=cnt+1;
+SELECT * FROM t1;
+
+DROP TABLE t1;