Re: Cannot query views with WHERE clause on renamed columns

From: David G Johnston <david(dot)g(dot)johnston(at)gmail(dot)com>
To: pgsql-general(at)postgresql(dot)org
Subject: Re: Cannot query views with WHERE clause on renamed columns
Date: 2014-06-30 22:59:24
Message-ID: 1404169164242-5809880.post@n5.nabble.com
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Alexander Reichstadt wrote
> Hi,
>
> I try to do what seems to be totally simple, but it fails. If I query a
> view that contains renamed columns without any qualifier like
>
> SELECT * FROM myview
>
> it displays everything. If however I do
>
> SELECT reanmedviewcolumn FROM myview
>
> It tells me column does not exist which in fact does. I can query any
> non-renamed columns. But the renamed ones I can neither call by their
> original name, not int he SELECT part nor in the WHERE clause.
>
> I can neither leave the view with just the original names as it's a
> selfjoin.
>
> What do I need to do?

Show us your actual code that is failing?

The general idea of what you are saying indeed works:

BEGIN;

CREATE VIEW myview AS SELECT 'one'::text AS one, 'two'::text AS two;

SELECT one FROM myview WHERE two = 'three';

ROLLBACK;

David J.

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