Add support for multi-row VALUES clauses as part of INSERT statements

(e.g. "INSERT ... VALUES (...), (...), ...") and elsewhere as allowed
by the spec. (e.g. similar to a FROM clause subselect). initdb required.
Joe Conway and Tom Lane.

src/backend/optimizer/util/plancat.c

@@ -9,7 +9,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/optimizer/util/plancat.c,v 1.122 2006/07/31 20:09:04 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/optimizer/util/plancat.c,v 1.123 2006/08/02 01:59:46 joe Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -493,9 +493,9 @@ relation_excluded_by_constraints(RelOptInfo *rel, RangeTblEntry *rte)
  * For now, we don't apply the physical-tlist optimization when there are
  * dropped cols.
  *
- * We also support building a "physical" tlist for subqueries and functions,
- * since the same optimization can occur in SubqueryScan and FunctionScan
- * nodes.
+ * We also support building a "physical" tlist for subqueries, functions,
+ * and values lists, since the same optimization can occur in SubqueryScan,
+ * FunctionScan, and ValuesScan nodes.
  */
 List *
 build_physical_tlist(PlannerInfo *root, RelOptInfo *rel)
@@ -594,6 +594,21 @@ build_physical_tlist(PlannerInfo *root, RelOptInfo *rel)
 			}
 			break;
 
+		case RTE_VALUES:
+			expandRTE(rte, varno, 0, false /* dropped not applicable */ ,
+					  NULL, &colvars);
+			foreach(l, colvars)
+			{
+				var = (Var *) lfirst(l);
+
+				tlist = lappend(tlist,
+								makeTargetEntry((Expr *) var,
+												var->varattno,
+												NULL,
+												false));
+			}
+			break;
+
 		default:
 			/* caller error */
 			elog(ERROR, "unsupported RTE kind %d in build_physical_tlist",