Add comment about possible zero value.

diff --git a/src/include/nodes/primnodes.h b/src/include/nodes/primnodes.h
index 0e667a05afd4caee3cf73401d053bea6a53cad96..2a3677a3430503a770b3555a4512343687dde90f 100644 (file)
--- a/src/include/nodes/primnodes.h
+++ b/src/include/nodes/primnodes.h
@@ -6,7 +6,7 @@
  *
  * Copyright (c) 1994, Regents of the University of California
  *
- * $Id: primnodes.h,v 1.1 1996/08/28 01:57:46 scrappy Exp $
+ * $Id: primnodes.h,v 1.2 1996/10/05 20:33:45 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -105,7 +105,7 @@ typedef struct Expr {
  * Var
  *     varno           - index of this var's relation in the range table
  *                       (could be INNER or OUTER)
- *     varattno        - attribute number of this var
+ *     varattno        - attribute number of this var, or zero for all
  *     vartype         - pg_type tuple oid for the type of this var
  *     varnoold        - keep varno around in case it got changed to INNER/
  *                       OUTER (see match_varid)