Added NULL value tests for UNIQUE index

mysql-test/r/ndb_index_unique.result

@@ -44,6 +44,51 @@ a	b	c
 7	8	3
 8	2	3
 drop table t1;
+CREATE TABLE t1 (
+a int unsigned NOT NULL PRIMARY KEY,
+b int unsigned,
+c int unsigned,
+UNIQUE bc(b,c)
+) engine = ndb;
+insert into t1 values(1,1,1),(2,NULL,2),(3,NULL,NULL),(4,4,NULL);
+select * from t1 use index (bc) where b IS NULL order by a;
+a	b	c
+2	NULL	2
+3	NULL	NULL
+select * from t1 use index (bc)order by a;
+a	b	c
+1	1	1
+2	NULL	2
+3	NULL	NULL
+4	4	NULL
+select * from t1 use index (bc) order by a;
+a	b	c
+1	1	1
+2	NULL	2
+3	NULL	NULL
+4	4	NULL
+select * from t1 use index (PRIMARY) where b IS NULL order by a;
+a	b	c
+2	NULL	2
+3	NULL	NULL
+select * from t1 use index (bc) where b IS NULL order by a;
+a	b	c
+2	NULL	2
+3	NULL	NULL
+select * from t1 use index (bc) where b IS NULL and c IS NULL order by a;
+a	b	c
+select * from t1 use index (bc) where b IS NULL and c = 2 order by a;
+a	b	c
+select * from t1 use index (bc) where b < 4 order by a;
+a	b	c
+1	1	1
+select * from t1 use index (bc) where b IS NOT NULL order by a;
+a	b	c
+1	1	1
+4	4	NULL
+insert into t1 values(5,1,1);
+ERROR 23000: Duplicate entry '5' for key 1
+drop table t1;
 CREATE TABLE t2 (
 a int unsigned NOT NULL PRIMARY KEY,
 b int unsigned not null,

mysql-test/t/ndb_index_unique.test

@@ -30,6 +30,32 @@ select * from t1 order by a;
 
 drop table t1;
 
+#
+# Indexing NULL values
+#
+
+CREATE TABLE t1 (
+  a int unsigned NOT NULL PRIMARY KEY,
+  b int unsigned,
+  c int unsigned,
+  UNIQUE bc(b,c)
+) engine = ndb;
+
+insert into t1 values(1,1,1),(2,NULL,2),(3,NULL,NULL),(4,4,NULL);
+select * from t1 use index (bc) where b IS NULL order by a;
+
+select * from t1 use index (bc)order by a;
+select * from t1 use index (bc) order by a;
+select * from t1 use index (PRIMARY) where b IS NULL order by a;
+select * from t1 use index (bc) where b IS NULL order by a;
+select * from t1 use index (bc) where b IS NULL and c IS NULL order by a;
+select * from t1 use index (bc) where b IS NULL and c = 2 order by a;
+select * from t1 use index (bc) where b < 4 order by a;
+select * from t1 use index (bc) where b IS NOT NULL order by a;
+-- error 1062
+insert into t1 values(5,1,1);
+drop table t1;
+
 
 #
 # Show use of UNIQUE USING HASH indexes