Fix OR index selectivity problem.

diff --git a/src/backend/optimizer/path/orindxpath.c b/src/backend/optimizer/path/orindxpath.c
index 5566954..833d00c 100644 (file)
--- a/src/backend/optimizer/path/orindxpath.c
+++ b/src/backend/optimizer/path/orindxpath.c
@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *       $Header: /cvsroot/pgsql/src/backend/optimizer/path/orindxpath.c,v 1.22 1999/03/08 13:35:50 momjian Exp $
+ *       $Header: /cvsroot/pgsql/src/backend/optimizer/path/orindxpath.c,v 1.23 1999/03/08 14:01:55 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -33,8 +33,7 @@
 
 static void
 best_or_subclause_indices(Query *root, RelOptInfo *rel, List *subclauses,
-List *indices, List *examined_indexids, Cost subcost, List *selectivities,
-                                                 List **indexids, Cost *cost, List **selecs);
+List *indices, List **indexids, Cost *cost, Cost *selec);
 static void best_or_subclause_index(Query *root, RelOptInfo *rel, Expr *subclause,
                                   List *indices, int *indexid, Cost *cost, Cost *selec);
 
@@ -87,20 +86,17 @@ create_or_index_paths(Query *root,
                        if (index_flag)
                        {                                       /* used to be a lisp every function */
                                IndexPath  *pathnode = makeNode(IndexPath);
-                               List       *indexids;
+                               List       *indexids = NIL;
                                Cost            cost;
-                               List       *selecs;
+                               Cost        selec;
 
                                best_or_subclause_indices(root,
                                                                                  rel,
                                                                                  clausenode->clause->args,
                                                                                  clausenode->indexids,
-                                                                                 NIL,
-                                                                                 (Cost) 0,
-                                                                                 NIL,
                                                                                  &indexids,
                                                                                  &cost,
-                                                                                 &selecs);
+                                                                                 &selec);
 
                                pathnode->path.pathtype = T_IndexScan;
                                pathnode->path.parent = rel;
@@ -132,7 +128,7 @@ create_or_index_paths(Query *root,
                                        ((Path *) pathnode)->path_cost += xfunc_get_path_cost((Path) pathnode);
                                }
 #endif
-                               clausenode->selectivity = (Cost) floatVal(lfirst(selecs));
+                               clausenode->selectivity = (Cost) selec;
                                t_list = lappend(t_list, pathnode);
                        }
                }
@@ -154,8 +150,7 @@ create_or_index_paths(Query *root,
  * 'examined_indexids' is a list of those index ids to be used with
  *             subclauses that have already been examined
  * 'subcost' is the cost of using the indices in 'examined_indexids'
- * 'selectivities' is a list of the selectivities of subclauses that
- *             have already been examined
+ * 'selec' is a list of all subclauses that have already been examined
  *
  * Returns a list of the indexids, cost, and selectivities of each
  * subclause, e.g., ((i1 i2 i3) cost (s1 s2 s3)), where 'i' is an OID,
@@ -166,15 +161,15 @@ best_or_subclause_indices(Query *root,
                                                  RelOptInfo *rel,
                                                  List *subclauses,
                                                  List *indices,
-                                                 List *examined_indexids,
-                                                 Cost subcost,
-                                                 List *selectivities,
                                                  List **indexids,              /* return value */
-                                                 Cost *cost,   /* return value */
-                                                 List **selecs)                /* return value */
+                                                 Cost *cost,                   /* return value */
+                                                 Cost *selec)                  /* return value */
 {
-       List       *slist;
+       List            *slist;
 
+       *selec = (Cost) 0.0;
+       *cost = (Cost) 0.0;
+       
        foreach(slist, subclauses)
        {
                int                     best_indexid;
@@ -184,17 +179,15 @@ best_or_subclause_indices(Query *root,
                best_or_subclause_index(root, rel, lfirst(slist), lfirst(indices),
                                                                &best_indexid, &best_cost, &best_selec);
 
-               examined_indexids = lappendi(examined_indexids, best_indexid);
-               subcost += best_cost;
-               selectivities = lappend(selectivities, makeFloat(best_selec));
+               *indexids = lappendi(*indexids, best_indexid);
+               *cost += best_cost;
+               *selec += best_selec;
+               if (*selec > (Cost) 1.0)
+                       *selec = (Cost) 1.0;
 
                indices = lnext(indices);
        }
 
-       *indexids = examined_indexids;
-       *cost = subcost;
-       *selecs = selectivities;
-
        return;
 }
 

diff --git a/src/backend/optimizer/util/plancat.c b/src/backend/optimizer/util/plancat.c
index b1d43db..ed16822 100644 (file)
--- a/src/backend/optimizer/util/plancat.c
+++ b/src/backend/optimizer/util/plancat.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *       $Header: /cvsroot/pgsql/src/backend/optimizer/util/plancat.c,v 1.26 1999/02/21 03:48:54 scrappy Exp $
+ *       $Header: /cvsroot/pgsql/src/backend/optimizer/util/plancat.c,v 1.27 1999/03/08 14:01:57 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -545,7 +545,6 @@ IndexSelectivity(Oid indexrelid,
        select = 1.0;
        for (n = 0; n < nIndexKeys; ++n)
        {
-
                /*
                 * Find the AM class for this key.
                 *