ndb: bug#6435

fix null handling in ha_ndbcluster when using ordered index

mysql-test/r/ndb_index_ordered.result

-drop table if exists t1;
+drop table if exists t1, test1, test2;
 CREATE TABLE t1 (
 a int unsigned NOT NULL PRIMARY KEY,
 b int unsigned not null,
@@ -275,3 +275,38 @@ a	b	c
 1	1	1
 4	4	NULL
 drop table t1;
+CREATE TABLE test1 (
+SubscrID int(11) NOT NULL auto_increment,
+UsrID int(11) NOT NULL default '0',
+PRIMARY KEY  (SubscrID),
+KEY idx_usrid (UsrID)
+) ENGINE=ndbcluster DEFAULT CHARSET=latin1;
+INSERT INTO test1 VALUES (2,224),(3,224),(1,224);
+CREATE TABLE test2 (
+SbclID int(11) NOT NULL auto_increment,
+SbcrID int(11) NOT NULL default '0',
+PRIMARY KEY  (SbclID),
+KEY idx_sbcrid (SbcrID)
+) ENGINE=ndbcluster DEFAULT CHARSET=latin1;
+INSERT INTO test2 VALUES (3,2),(1,1),(2,1),(4,2);
+select * from test1 order by 1;
+SubscrID	UsrID
+1	224
+2	224
+3	224
+select * from test2 order by 1;
+SbclID	SbcrID
+1	1
+2	1
+3	2
+4	2
+SELECT s.SubscrID,l.SbclID FROM test1 s left JOIN test2 l ON
+l.SbcrID=s.SubscrID WHERE s.UsrID=224 order by 1, 2;
+SubscrID	SbclID
+1	1
+1	2
+2	3
+2	4
+3	NULL
+drop table test1;
+drop table test2;

mysql-test/t/ndb_index_ordered.test

 -- source include/have_ndb.inc
 
 --disable_warnings
-drop table if exists t1;
+drop table if exists t1, test1, test2;
 --enable_warnings
 
 #
@@ -146,3 +146,29 @@ 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;
 drop table t1;
+
+#
+# Bug #6435
+CREATE TABLE test1 (
+SubscrID int(11) NOT NULL auto_increment,
+UsrID int(11) NOT NULL default '0',
+PRIMARY KEY  (SubscrID),
+KEY idx_usrid (UsrID)
+) ENGINE=ndbcluster DEFAULT CHARSET=latin1;
+
+INSERT INTO test1 VALUES (2,224),(3,224),(1,224);
+
+CREATE TABLE test2 (
+SbclID int(11) NOT NULL auto_increment,
+SbcrID int(11) NOT NULL default '0',
+PRIMARY KEY  (SbclID),
+KEY idx_sbcrid (SbcrID)
+) ENGINE=ndbcluster DEFAULT CHARSET=latin1;
+
+INSERT INTO test2 VALUES (3,2),(1,1),(2,1),(4,2);
+select * from test1 order by 1;
+select * from test2 order by 1;
+SELECT s.SubscrID,l.SbclID FROM test1 s left JOIN test2 l ON
+l.SbcrID=s.SubscrID WHERE s.UsrID=224 order by 1, 2;
+drop table test1;
+drop table test2;

sql/ha_ndbcluster.cc

@@ -1290,7 +1290,6 @@ int ha_ndbcluster::set_bounds(NdbIndexScanOperation *op,
     Field *field= key_part->field;
     uint part_len= key_part->length;
     uint part_store_len= key_part->store_length;
-    bool part_nullable= (bool) key_part->null_bit;
     // Info about each key part
     struct part_st {
       bool part_last;
@@ -1312,9 +1311,9 @@ int ha_ndbcluster::set_bounds(NdbIndexScanOperation *op,
         p.part_last= (tot_len + part_store_len >= key_tot_len[j]);
         p.key= keys[j];
         p.part_ptr= &p.key->key[tot_len];
-        p.part_null= (field->maybe_null() && *p.part_ptr);
+        p.part_null= key_part->null_bit && *p.part_ptr;
         p.bound_ptr= (const char *)
-          p.part_null ? 0 : part_nullable ? p.part_ptr + 1 : p.part_ptr;
+          p.part_null ? 0 : key_part->null_bit ? p.part_ptr + 1 : p.part_ptr;
 
         if (j == 0)
         {