This wouldn't ever be pushed

mysql-test/t/handler.test

@@ -3,30 +3,47 @@
 #
 
 drop table if exists t1;
-create table t1 (a int, b char(10), key a(a));
+create table t1 (a int, b char(10), key a(a), key b(a,b));
 insert into t1 values
-(14,"aaa"),(15,"bbb"),(16,"ccc"),
-(17,"ddd"),(18,"eee"),(19,"fff"),
+(14,"aaa"),(15,"bbb"),(16,"ccc"),(16,"xxx"),
+(17,"ddd"),(18,"eee"),(19,"fff"),(19,"yyy"),
 (20,"ggg"),(21,"hhh"),(22,"iii");
-handler t1 open;
-handler t1 read a first;
-handler t1 read a next;
-handler t1 read a next;
-handler t1 read a prev;
-handler t1 read a last;
-handler t1 read a prev;
-handler t1 read a prev;
-
-handler t1 read a first;
-handler t1 read a prev;
-
-handler t1 read a last;
-handler t1 read a prev;
-handler t1 read a next;
-handler t1 read a next;
-
-handler t1 read a=(15);
-
-handler t1 close;
-drop table if exists t1;
+handler t1 open as t2;
+handler t2 read a first;
+handler t2 read a next;
+handler t2 read a next;
+handler t2 read a prev;
+handler t2 read a last;
+handler t2 read a prev;
+handler t2 read a prev;
+
+handler t2 read a first;
+handler t2 read a prev;
+
+handler t2 read a last;
+handler t2 read a prev;
+handler t2 read a next;
+handler t2 read a next;
+
+handler t2 read a=(15);
+handler t2 read a=(16);
+
+!$1070 handler t2 read a=(19,"fff");
 
+handler t2 read b=(19,"fff");
+handler t2 read b=(19,"yyy");
+handler t2 read b=(19);
+
+!$1109 handler t1 read a last;
+
+handler t2 read a=(11);
+handler t2 read a>=(11);
+
+handler t2 read a=(18);
+handler t2 read a>=(18);
+handler t2 read a>(18);
+handler t2 read a<=(18);
+handler t2 read a<(18);
+
+handler t2 close;
+drop table if exists t1;

sql/sql_handler.cc

@@ -90,6 +90,12 @@ int mysql_ha_read(THD *thd, TABLE_LIST *tables,
         KEY *keyinfo=table->key_info+keyno;
 	uint key_len=0, i;
 	byte *key, *buf;
+	if (key_expr->elements > keyinfo->key_parts)
+	{
+	   my_printf_error(ER_TOO_MANY_KEY_PARTS,ER(ER_TOO_MANY_KEY_PARTS),
+	       MYF(0),keyinfo->key_parts);
+           return -1;
+	}
 	for (i=0; i < key_expr->elements; i++)
 	  key_len+=keyinfo->key_part[i].store_length;
 	if (!(key=sql_calloc(ALIGN_SIZE(key_len))))