Fix breakage of rules using NOTIFY actions, per bug report and patch

from sergiop@sinectis.com.ar.

src/backend/rewrite/rewriteHandler.c

@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteHandler.c,v 1.86 2000/12/07 01:22:25 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteHandler.c,v 1.87 2001/01/03 22:01:05 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -124,6 +124,7 @@ gatherRewriteMeta(Query *parsetree,
 	 * Note that if the rule refers to OLD, its jointree will add back
 	 * a reference to rt_index.
 	 */
+	if (sub_action->jointree != NULL)
 	{
 		bool	found;
 		List   *newjointree = adjustJoinTreeList(parsetree,

src/backend/utils/adt/ruleutils.c

@@ -3,7 +3,7 @@
  *				back to source text
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/adt/ruleutils.c,v 1.70 2000/11/18 04:40:18 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/adt/ruleutils.c,v 1.71 2001/01/03 22:01:05 tgl Exp $
  *
  *	  This software is copyrighted by Jan Wieck - Hamburg.
  *
@@ -97,6 +97,7 @@ static void get_select_query_def(Query *query, deparse_context *context);
 static void get_insert_query_def(Query *query, deparse_context *context);
 static void get_update_query_def(Query *query, deparse_context *context);
 static void get_delete_query_def(Query *query, deparse_context *context);
+static void get_utility_query_def(Query *query, deparse_context *context);
 static void get_basic_select_query(Query *query, deparse_context *context);
 static void get_setop_query(Node *setOp, Query *query,
 							deparse_context *context, bool toplevel);
@@ -874,6 +875,10 @@ get_query_def(Query *query, StringInfo buf, List *parentrtables)
 			appendStringInfo(buf, "NOTHING");
 			break;
 
+		case CMD_UTILITY:
+			get_utility_query_def(query, &context);
+			break;
+
 		default:
 			elog(ERROR, "get_ruledef of %s: query command type %d not implemented yet",
 				 rulename, query->commandType);
@@ -1310,6 +1315,26 @@ get_delete_query_def(Query *query, deparse_context *context)
 	}
 }
 
+
+/* ----------
+ * get_utility_query_def			- Parse back a UTILITY parsetree
+ * ----------
+ */
+static void
+get_utility_query_def(Query *query, deparse_context *context)
+{
+	StringInfo	buf = context->buf;
+
+	if (query->utilityStmt && IsA(query->utilityStmt, NotifyStmt))
+	{
+		NotifyStmt *stmt = (NotifyStmt *) query->utilityStmt;
+		appendStringInfo(buf, "NOTIFY %s", quote_identifier(stmt->relname));
+	}
+	else
+		elog(ERROR, "get_utility_query_def: unexpected statement type");
+}
+
+
 /*
  * Find the RTE referenced by a (possibly nonlocal) Var.
  */