Small refactoring of makeVar() from a TargetEntry

src/backend/nodes/makefuncs.c

@@ -9,7 +9,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/nodes/makefuncs.c,v 1.66 2010/01/02 16:57:46 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/nodes/makefuncs.c,v 1.67 2010/08/27 20:30:07 petere Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -17,6 +17,7 @@
 
 #include "catalog/pg_type.h"
 #include "nodes/makefuncs.h"
+#include "nodes/nodeFuncs.h"
 #include "utils/lsyscache.h"
 
 
@@ -90,6 +91,22 @@ makeVar(Index varno,
 	return var;
 }
 
+/*
+ * makeVarFromTargetEntry -
+ *		convenience function to create a same-level Var node from a
+ *		TargetEntry
+ */
+Var *
+makeVarFromTargetEntry(Index varno,
+					   TargetEntry *tle)
+{
+	return makeVar(varno,
+				   tle->resno,
+				   exprType((Node *) tle->expr),
+				   exprTypmod((Node *) tle->expr),
+				   0);
+}
+
 /*
  * makeTargetEntry -
  *	  creates a TargetEntry node

src/backend/optimizer/path/pathkeys.c

@@ -11,7 +11,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/optimizer/path/pathkeys.c,v 1.101 2010/02/26 02:00:45 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/optimizer/path/pathkeys.c,v 1.102 2010/08/27 20:30:08 petere Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -629,12 +629,7 @@ convert_subquery_pathkeys(PlannerInfo *root, RelOptInfo *rel,
 
 				Assert(list_length(sub_eclass->ec_members) == 1);
 				sub_member = (EquivalenceMember *) linitial(sub_eclass->ec_members);
-				outer_expr = (Expr *)
-					makeVar(rel->relid,
-							tle->resno,
-							exprType((Node *) tle->expr),
-							exprTypmod((Node *) tle->expr),
-							0);
+				outer_expr = (Expr *) makeVarFromTargetEntry(rel->relid, tle);
 
 				/*
 				 * Note: it might look funny to be setting sortref = 0 for a
@@ -712,12 +707,7 @@ convert_subquery_pathkeys(PlannerInfo *root, RelOptInfo *rel,
 					if (equal(tle->expr, sub_expr))
 					{
 						/* Exact match */
-						outer_expr = (Expr *)
-							makeVar(rel->relid,
-									tle->resno,
-									exprType((Node *) tle->expr),
-									exprTypmod((Node *) tle->expr),
-									0);
+						outer_expr = (Expr *) makeVarFromTargetEntry(rel->relid, tle);
 					}
 					else
 					{
@@ -730,12 +720,7 @@ convert_subquery_pathkeys(PlannerInfo *root, RelOptInfo *rel,
 						if (equal(tle_stripped, sub_stripped))
 						{
 							/* Match after discarding RelabelType */
-							outer_expr = (Expr *)
-								makeVar(rel->relid,
-										tle->resno,
-										exprType((Node *) tle->expr),
-										exprTypmod((Node *) tle->expr),
-										0);
+							outer_expr = (Expr *) makeVarFromTargetEntry(rel->relid, tle);
 							if (exprType((Node *) outer_expr) !=
 								exprType((Node *) sub_expr))
 								outer_expr = (Expr *)

src/backend/optimizer/plan/setrefs.c

@@ -9,7 +9,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/optimizer/plan/setrefs.c,v 1.161 2010/07/12 17:01:06 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/optimizer/plan/setrefs.c,v 1.162 2010/08/27 20:30:08 petere Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1283,11 +1283,7 @@ search_indexed_tlist_for_non_var(Node *node,
 		/* Found a matching subplan output expression */
 		Var		   *newvar;
 
-		newvar = makeVar(newvarno,
-						 tle->resno,
-						 exprType((Node *) tle->expr),
-						 exprTypmod((Node *) tle->expr),
-						 0);
+		newvar = makeVarFromTargetEntry(newvarno, tle);
 		newvar->varnoold = 0;	/* wasn't ever a plain Var */
 		newvar->varoattno = 0;
 		return newvar;
@@ -1325,11 +1321,7 @@ search_indexed_tlist_for_sortgroupref(Node *node,
 			/* Found a matching subplan output expression */
 			Var		   *newvar;
 
-			newvar = makeVar(newvarno,
-							 tle->resno,
-							 exprType((Node *) tle->expr),
-							 exprTypmod((Node *) tle->expr),
-							 0);
+			newvar = makeVarFromTargetEntry(newvarno, tle);
 			newvar->varnoold = 0;		/* wasn't ever a plain Var */
 			newvar->varoattno = 0;
 			return newvar;

src/backend/optimizer/plan/subselect.c

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/optimizer/plan/subselect.c,v 1.163 2010/07/12 17:01:06 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/optimizer/plan/subselect.c,v 1.164 2010/08/27 20:30:08 petere Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -737,11 +737,7 @@ generate_subquery_vars(PlannerInfo *root, List *tlist, Index varno)
 		if (tent->resjunk)
 			continue;
 
-		var = makeVar(varno,
-					  tent->resno,
-					  exprType((Node *) tent->expr),
-					  exprTypmod((Node *) tent->expr),
-					  0);
+		var = makeVarFromTargetEntry(varno, tent);
 		result = lappend(result, var);
 	}
 

src/backend/optimizer/prep/prepjointree.c

@@ -16,7 +16,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/optimizer/prep/prepjointree.c,v 1.73 2010/07/06 19:18:56 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/optimizer/prep/prepjointree.c,v 1.74 2010/08/27 20:30:08 petere Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -991,11 +991,7 @@ make_setop_translation_list(Query *query, Index newvarno,
 		if (tle->resjunk)
 			continue;
 
-		vars = lappend(vars, makeVar(newvarno,
-									 tle->resno,
-									 exprType((Node *) tle->expr),
-									 exprTypmod((Node *) tle->expr),
-									 0));
+		vars = lappend(vars, makeVarFromTargetEntry(newvarno, tle));
 	}
 
 	*translated_vars = vars;

src/backend/optimizer/util/plancat.c

@@ -9,7 +9,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/optimizer/util/plancat.c,v 1.163 2010/03/30 21:58:10 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/optimizer/util/plancat.c,v 1.164 2010/08/27 20:30:08 petere Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -727,11 +727,7 @@ build_physical_tlist(PlannerInfo *root, RelOptInfo *rel)
 				 * A resjunk column of the subquery can be reflected as
 				 * resjunk in the physical tlist; we need not punt.
 				 */
-				var = makeVar(varno,
-							  tle->resno,
-							  exprType((Node *) tle->expr),
-							  exprTypmod((Node *) tle->expr),
-							  0);
+				var = makeVarFromTargetEntry(varno, tle);
 
 				tlist = lappend(tlist,
 								makeTargetEntry((Expr *) var,

src/backend/parser/analyze.c

@@ -17,7 +17,7 @@
  * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- *	$PostgreSQL: pgsql/src/backend/parser/analyze.c,v 1.402 2010/02/26 02:00:49 momjian Exp $
+ *	$PostgreSQL: pgsql/src/backend/parser/analyze.c,v 1.403 2010/08/27 20:30:08 petere Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -484,11 +484,7 @@ transformInsertStmt(ParseState *pstate, InsertStmt *stmt)
 				expr = tle->expr;
 			else
 			{
-				Var		   *var = makeVar(rtr->rtindex,
-										  tle->resno,
-										  exprType((Node *) tle->expr),
-										  exprTypmod((Node *) tle->expr),
-										  0);
+				Var		   *var = makeVarFromTargetEntry(rtr->rtindex, tle);
 
 				var->location = exprLocation((Node *) tle->expr);
 				expr = (Expr *) var;

src/include/nodes/makefuncs.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/nodes/makefuncs.h,v 1.70 2010/01/02 16:58:04 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/nodes/makefuncs.h,v 1.71 2010/08/27 20:30:08 petere Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -29,6 +29,9 @@ extern Var *makeVar(Index varno,
 		int32 vartypmod,
 		Index varlevelsup);
 
+extern Var *makeVarFromTargetEntry(Index varno,
+								   TargetEntry *tle);
+
 extern TargetEntry *makeTargetEntry(Expr *expr,
 				AttrNumber resno,
 				char *resname,