*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/parser/Attic/gram.c,v 2.76 1999/03/07 03:34:06 momjian Exp $
+ * $Header: /cvsroot/pgsql/src/backend/parser/Attic/gram.c,v 2.77 1999/03/14 05:14:59 momjian Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.58 1999/03/07 03:34:10 momjian Exp $
+ * $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.59 1999/03/14 05:15:08 momjian Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
{ $$ = makeA_Expr(OP, "<", $1, $3); }
| a_expr '>' a_expr
{ $$ = makeA_Expr(OP, ">", $1, $3); }
+ | a_expr '=' NULL_P
+ { $$ = makeA_Expr(ISNULL, NULL, $1, NULL); }
| a_expr '=' a_expr
{ $$ = makeA_Expr(OP, "=", $1, $3); }
| ':' a_expr