*** ../src/backend/parser/parse_expr.c.orig	Sun Mar  1 15:04:42 1998
--- ../src/backend/parser/parse_expr.c	Sun Mar 15 05:49:03 1998
***************
*** 301,306 ****
--- 301,321 ----
  				result = (Node *) expr;
  				break;
  			}
+ /* These nodes do _not_ come from the original parse tree.
+  * They result from parser transformation in this phase.
+  * At least one construct (BETWEEN/AND) puts the same nodes
+  *  into two branches of the parse tree. Hence, some nodes
+  *  are transformed twice. These nodes come from transforming
+  *  a function call. Let's try just passing them through...
+  * - thomas 1998-03-14
+  */
+ 		case T_Expr:
+ 		case T_Var:
+ 		case T_Const:
+ 			{
+ 				result = (Node *) expr;
+ 				break;
+ 			}
  		default:
  			/* should not reach here */
  			elog(ERROR, "transformExpr: does not know how to transform node %d",