From: Andrew Dunstan <andrew@dunslane.net>
Date: Mon, 2 Sep 2013 18:41:02 +0000 (-0400)
Subject: Fix relfrozenxid query in docs to include TOAST tables.
X-Git-Tag: REL8_4_18~12
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=9346ed0be1ac9b326d6eeb78ec19efa2ed95a88d;p=postgresql

Fix relfrozenxid query in docs to include TOAST tables.

The original query ignored TOAST tables which could result in tables
needing a vacuum not being reported.

Backpatch to all live branches.
---

diff --git a/doc/src/sgml/maintenance.sgml b/doc/src/sgml/maintenance.sgml
index c866322014..385ee20d0c 100644
--- a/doc/src/sgml/maintenance.sgml
+++ b/doc/src/sgml/maintenance.sgml
@@ -489,7 +489,12 @@
     examine this information is to execute queries such as:
 
 <programlisting>
-SELECT relname, age(relfrozenxid) FROM pg_class WHERE relkind = 'r';
+SELECT c.oid::regclass as table_name,
+       greatest(age(c.relfrozenxid),age(t.relfrozenxid)) as age
+FROM pg_class c
+LEFT JOIN pg_class t ON c.reltoastrelid = t.oid
+WHERE c.relkind = 'r';
+
 SELECT datname, age(datfrozenxid) FROM pg_database;
 </programlisting>