From a1ee06625c268a10ce572e72af07ac082626eeb0 Mon Sep 17 00:00:00 2001
From: Peter Eisentraut
Date: Thu, 20 Sep 2001 14:20:28 +0000
Subject: Provide tunable knob for x = NULL -> x IS NULL transformation,
 default to off.

---
 src/include/parser/gramparse.h  | 3 ++-
 src/include/parser/parse_expr.h | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

(limited to 'src/include/parser')

diff --git a/src/include/parser/gramparse.h b/src/include/parser/gramparse.h
index 88c00ce9f37..ad045dd4b60 100644
--- a/src/include/parser/gramparse.h
+++ b/src/include/parser/gramparse.h
@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: gramparse.h,v 1.15 2001/02/09 03:26:27 tgl Exp $
+ * $Id: gramparse.h,v 1.16 2001/09/20 14:20:28 petere Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -29,5 +29,6 @@ extern Oid	param_type(int t);
 extern int	yyparse(void);
 extern char *xlateSqlFunc(char *name);
 extern char *xlateSqlType(char *name);
+bool exprIsNullConstant(Node *arg);
 
 #endif	 /* GRAMPARSE_H */
diff --git a/src/include/parser/parse_expr.h b/src/include/parser/parse_expr.h
index 4dfc2367fd5..c51bf7cc044 100644
--- a/src/include/parser/parse_expr.h
+++ b/src/include/parser/parse_expr.h
@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: parse_expr.h,v 1.21 2001/01/24 19:43:27 momjian Exp $
+ * $Id: parse_expr.h,v 1.22 2001/09/20 14:20:28 petere Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -20,6 +20,7 @@
 #define EXPR_RELATION_FIRST 2
 
 extern int	max_expr_depth;
+extern bool Transform_null_equals;
 
 extern Node *transformExpr(ParseState *pstate, Node *expr, int precedence);
 extern Oid	exprType(Node *expr);
-- 
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