More optimization.

diff --git a/src/backend/optimizer/util/pathnode.c b/src/backend/optimizer/util/pathnode.c
index 47b6f3be2b69fe5a6b9336bf12143181e5260afb..c86ab8a2aa02e6ecaf3efdfdd6b21575f73a823c 100644 (file)
--- a/src/backend/optimizer/util/pathnode.c
+++ b/src/backend/optimizer/util/pathnode.c
@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *       $Header: /cvsroot/pgsql/src/backend/optimizer/util/pathnode.c,v 1.26 1999/02/11 14:59:02 momjian Exp $
+ *       $Header: /cvsroot/pgsql/src/backend/optimizer/util/pathnode.c,v 1.27 1999/02/11 16:09:41 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -194,9 +194,9 @@ better_path(Path *new_path, List *unique_paths, bool *is_new)
                                 * Replace pathkeys that match exactly, (1,2), (1,2).
                                 * Replace pathkeys (1,2) with (1,2,3) if the latter is not
                                 * more expensive and replace unordered path with ordered
-                                * path if it is not more expensive.
+                                * path if it is not more expensive.  Favor sorted keys
+                                * over unsorted keys in the same way.
                                 */
-                                
                                                                /* same keys, and new is cheaper, use it */
                            if ((longer_key == 0 && more_sort == 0 &&
                                        new_path->path_cost <  path->path_cost) ||