Merge mysql.com:/windows/Linux_space/MySQL/mysql-5.0-ndb

into  mysql.com:/windows/Linux_space/MySQL/mysql-5.1-new-ndb

mysql-test/r/ndb_insert.result

@@ -649,3 +649,11 @@ pk	a
 6	NULL
 7	4
 DROP TABLE t1;
+create table t1(a int primary key, b int, unique key(b)) engine=ndb;
+insert ignore into t1 values (1,0), (2,0), (2,null), (3,null);
+select * from t1 order by a;
+a	b
+1	0
+2	NULL
+3	NULL
+drop table t1;

mysql-test/t/ndb_insert.test

@@ -630,4 +630,13 @@ INSERT IGNORE INTO t1 VALUES (4,NULL),(5,NULL),(6,NULL),(7,4);
 SELECT * FROM t1 ORDER BY pk;
 DROP TABLE t1;
 
+#
+# Bug #27980  	INSERT IGNORE wrongly ignores NULLs in unique index
+#
+
+create table t1(a int primary key, b int, unique key(b)) engine=ndb;
+insert ignore into t1 values (1,0), (2,0), (2,null), (3,null);
+select * from t1 order by a;
+drop table t1;
+
 # End of 4.1 tests