Message-Id: <200612262027.kBQKR80j031116@amanda.contactbda.com>
From: "Jim Buttafuoco" <jim@contactbda.com>
To: "'Jan Meyland Andersen'" <jma@agile.dk>, "'Michael Fuhr'" <mike@fuhr.org>
Cc: <pgsql-sql@postgresql.org>
Subject: Re: Related tables to a view
Date: Tue, 26 Dec 2006 15:27:03 -0500
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Try this query


select a.relname as base,a.relkind
from
pg_class a
join pg_depend d on (a.oid = d.refobjid)
join pg_class c on (d.classid = c.oid)
join pg_rewrite r on (objid = r.oid)
join pg_class v on (ev_class = v.oid)
where a.relkind in('r', 'v')
and a.relname <> v.relname
and v.relname='YOUR VIEW NAME HERE'
order by 1

-----Original Message-----
From: pgsql-sql-owner@postgresql.org [mailto:pgsql-sql-owner@postgresql.org]
On Behalf Of Jan Meyland Andersen
Sent: Tuesday, December 26, 2006 3:11 PM
To: Michael Fuhr
Cc: Jan Meyland Andersen; pgsql-sql@postgresql.org
Subject: Re: [SQL] Related tables to a view

> You could query pg_depend to find out which tables and columns the
> view's rewrite rule depends on but that's not as specific as what
> you're requesting.  I'm not aware of a way to associate a particular
> table column with a particular view column short of parsing the view
> definition or rule action; doing so would have to allow for the
> possibility of a view column deriving its value from an arbitrarily
> complex expression involving multiple tables, subqueries, etc.

I have been thinking the problem through again, and I think I am able to
solve the problem if I just know which tables the view is using.

But how do I get this information from the pg_depend table?

Regards

Jan


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