*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.322 2008/01/09 08:46:44 neilc Exp $
+ * $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.322.2.1 2008/12/01 21:06:20 tgl Exp $
*
* NOTES
* Every node type that can appear in stored rules' parsetrees *must*
WRITE_BITMAPSET_FIELD(right_relids);
WRITE_NODE_FIELD(orclause);
/* don't write parent_ec, leads to infinite recursion in plan tree dump */
+ WRITE_FLOAT_FIELD(this_selec, "%.4f");
WRITE_NODE_FIELD(mergeopfamilies);
/* don't write left_ec, leads to infinite recursion in plan tree dump */
/* don't write right_ec, leads to infinite recursion in plan tree dump */
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/optimizer/path/clausesel.c,v 1.90 2008/01/11 17:00:45 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/optimizer/path/clausesel.c,v 1.90.2.1 2008/12/01 21:06:20 tgl Exp $
*
*-------------------------------------------------------------------------
*/
return (Selectivity) 1.0;
}
+ /*
+ * If the clause is marked redundant, always return 1.0.
+ */
+ if (rinfo->this_selec > 1)
+ return (Selectivity) 1.0;
+
/*
* If possible, cache the result of the selectivity calculation for
* the clause. We can cache if varRelid is zero or the clause
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/optimizer/path/equivclass.c,v 1.9.2.1 2008/03/31 16:59:33 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/optimizer/path/equivclass.c,v 1.9.2.2 2008/12/01 21:06:20 tgl Exp $
*
*-------------------------------------------------------------------------
*/
list_delete_cell(root->left_join_clauses, cell, prev);
/* we throw it back anyway (see notes above) */
/* but the thrown-back clause has no extra selectivity */
- rinfo->this_selec = 1.0;
+ rinfo->this_selec = 2.0;
distribute_restrictinfo_to_rels(root, rinfo);
}
else
list_delete_cell(root->right_join_clauses, cell, prev);
/* we throw it back anyway (see notes above) */
/* but the thrown-back clause has no extra selectivity */
- rinfo->this_selec = 1.0;
+ rinfo->this_selec = 2.0;
distribute_restrictinfo_to_rels(root, rinfo);
}
else
list_delete_cell(root->full_join_clauses, cell, prev);
/* we throw it back anyway (see notes above) */
/* but the thrown-back clause has no extra selectivity */
- rinfo->this_selec = 1.0;
+ rinfo->this_selec = 2.0;
distribute_restrictinfo_to_rels(root, rinfo);
}
else
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/nodes/relation.h,v 1.154.2.2 2008/04/21 20:54:24 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/nodes/relation.h,v 1.154.2.3 2008/12/01 21:06:20 tgl Exp $
*
*-------------------------------------------------------------------------
*/
/* cache space for cost and selectivity */
QualCost eval_cost; /* eval cost of clause; -1 if not yet set */
- Selectivity this_selec; /* selectivity; -1 if not yet set */
+ Selectivity this_selec; /* selectivity; -1 if not yet set; >1 means
+ * a redundant clause */
/* valid if clause is mergejoinable, else NIL */
List *mergeopfamilies; /* opfamilies containing clause operator */