Simple optimization

bcf562fc · unknown · 890f427f · bcf562fc
Commit bcf562fc authored Oct 07, 2003 by unknown
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Showing with 3 additions and 1 deletion

sql/sql_select.cc sql/sql_select.cc +3 -1

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--- a/sql/sql_select.cc
+++ b/sql/sql_select.cc
@@ -6661,7 +6661,9 @@ test_if_skip_sort_order(JOIN_TAB *tab,ORDER *order,ha_rows select_limit,
      usable_keys=0;
      break;
    }
-    usable_keys&=((Item_field*) (*tmp_order->item))->field->part_of_sortkey;
+    if (!(usable_keys&= (((Item_field*) (*tmp_order->item))->field->
+			 part_of_sortkey)))
+      break;					// No usable keys
  }

  ref_key= -1;