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Fix relfrozenxid query in docs to include TOAST tables.

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

Backpatch to all live branches.
This commit is contained in:
Andrew Dunstan 2013-09-02 14:36:24 -04:00
parent e912963a22
commit 7d0492f337
1 changed files with 6 additions and 1 deletions
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7
doc/src/sgml/maintenance.sgml
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@ -534,7 +534,12 @@
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>