Merge gkodinov@bk-internal.mysql.com:/home/bk/mysql-5.1-bugteam

into  magare.gmz:/home/kgeorge/mysql/autopush/B35206-5.1-bugteam


sql/sql_select.cc:
  Auto merged

mysql-test/r/order_by.result

@@ -1428,3 +1428,33 @@ set session max_sort_length= 2180;
 select * from t1 order by b;
 ERROR HY001: Out of sort memory; increase server sort buffer size
 drop table t1;
+CREATE TABLE t2 (a varchar(32), b int(11), c float, d double, 
+UNIQUE KEY a (a,b,c), KEY b (b), KEY c (c));
+CREATE TABLE t1 (a varchar(32), b char(3), UNIQUE KEY a (a,b), KEY b (b));
+CREATE TABLE t3 (a varchar(32), b char(3), UNIQUE KEY a (a,b));
+INSERT INTO t3 SELECT * FROM t1;
+EXPLAIN
+SELECT d FROM t1, t2
+WHERE t2.b=14 AND t2.a=t1.a AND 5.1<t2.c AND t1.b='DE'
+ORDER BY t2.c LIMIT 1;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a,b	b	4	const	4	Using where; Using temporary; Using filesort
+1	SIMPLE	t2	ref	a,b,c	a	40	test.t1.a,const	11	Using where
+SELECT d FROM t1, t2
+WHERE t2.b=14 AND t2.a=t1.a AND 5.1<t2.c AND t1.b='DE'
+ORDER BY t2.c LIMIT 1;
+d
+52.5
+EXPLAIN
+SELECT d FROM t3 AS t1, t2 AS t2 
+WHERE t2.b=14 AND t2.a=t1.a AND 5.1<t2.c AND t1.b='DE'
+ORDER BY t2.c LIMIT 1;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t2	range	a,b,c	c	5	NULL	420	Using where
+1	SIMPLE	t1	ref	a	a	39	test.t2.a,const	10	Using where; Using index
+SELECT d FROM t3 AS t1, t2 AS t2 
+WHERE t2.b=14 AND t2.a=t1.a AND 5.1<t2.c AND t1.b='DE'
+ORDER BY t2.c LIMIT 1;
+d
+52.5
+DROP TABLE t1,t2,t3;

sql/sql_select.cc

@@ -13177,6 +13177,23 @@ test_if_skip_sort_order(JOIN_TAB *tab,ORDER *order,ha_rows select_limit,
               tab->limit= select_limit;
           }
         }
+        else if (tab->type != JT_ALL)
+        {
+          /*
+            We're about to use a quick access to the table.
+            We need to change the access method so as the quick access
+            method is actually used.
+          */
+          DBUG_ASSERT(tab->select->quick);
+          tab->type=JT_ALL;
+          tab->use_quick=1;
+          tab->ref.key= -1;
+          tab->ref.key_parts=0;		// Don't use ref key.
+          tab->read_first_record= join_init_read_record;
+          /*
+            TODO: update the number of records in join->best_positions[tablenr]
+          */
+        }
       }
       used_key_parts= best_key_parts;
       order_direction= best_key_direction;