PG-147 Stored Procedure Support add parentid to track caller.

Patch By: Martin Sun
Reviewed By: Hamid Akhtar

pg_stat_monitor--1.0.sql

@@ -31,6 +31,7 @@ CREATE FUNCTION pg_stat_monitor(IN showtext boolean,
     OUT client_ip           int8,
 
     OUT queryid             text,
+    OUT parentid            text,
     OUT query               text,
 	OUT application_name	text,
 	OUT relations			text,
@@ -125,10 +126,12 @@ CREATE VIEW pg_stat_monitor AS SELECT
     datname,
 	'0.0.0.0'::inet + client_ip AS client_ip,
     queryid,
+    parentid,
     query,
+	(SELECT query from pg_stat_monitor(true) s where s.queryid = p.parentid) AS parent_query,
 	application_name,
 	string_to_array(relations, ',') AS relations,
-	cmd_type, 
+	cmd_type,
 	get_cmd_type(cmd_type) AS cmd_type_text,
 	elevel,
 	sqlcode,