Remove typename from A_Const.

Brendan Jurd, minor editorialization by me.

Author: alvherre

src/backend/nodes/copyfuncs.c

@@ -15,7 +15,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.392 2008/04/14 17:05:33 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.393 2008/04/29 14:59:16 alvherre Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1639,8 +1639,6 @@ _copyAConst(A_Const *from)
 			break;
 	}
 
-	COPY_NODE_FIELD(typename);
-
 	return newnode;
 }
 

src/backend/nodes/equalfuncs.c

@@ -18,7 +18,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/nodes/equalfuncs.c,v 1.321 2008/04/14 17:05:33 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/nodes/equalfuncs.c,v 1.322 2008/04/29 14:59:16 alvherre Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1693,7 +1693,6 @@ _equalAConst(A_Const *a, A_Const *b)
 {
 	if (!equal(&a->val, &b->val))		/* hack for in-line Value field */
 		return false;
-	COMPARE_NODE_FIELD(typename);
 
 	return true;
 }

src/backend/nodes/outfuncs.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.325 2008/04/13 20:51:20 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.326 2008/04/29 14:59:16 alvherre Exp $
  *
  * NOTES
  *	  Every node type that can appear in stored rules' parsetrees *must*
@@ -1945,7 +1945,6 @@ _outAConst(StringInfo str, A_Const *node)
 
 	appendStringInfo(str, " :val ");
 	_outValue(str, &(node->val));
-	WRITE_NODE_FIELD(typename);
 }
 
 static void