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From: Richard Huxton <dev@archonet.com>
Organization: Archonet Ltd
To: Gary Stainburn <gary.stainburn@ringways.co.uk>,
	pgsql-sql@postgresql.org
Subject: Re: Concat and view - Re: create view error
Date: Mon, 7 Jul 2003 16:44:01 +0100
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References: <200307071240.23936.gary.stainburn@ringways.co.uk>
	<200307071534.20970.dev@archonet.com>
	<200307071610.25690.gary.stainburn@ringways.co.uk>
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On Monday 07 Jul 2003 4:10 pm, Gary Stainburn wrote:
> On Monday 07 Jul 2003 3:34 pm, Richard Huxton wrote:
> > Don't do "select *" do "select field_a,field_b..." - the * doesn't just
> > refer to the locos table.
>
> Sorry if I didn't make myself plain enough, but I had
>
> create view loco_dets as
>     select * from locos l               -- includes lid which I want
>        left outer join
>           (select lnid, lnumber.......) ln on ln.lnid =3D l.lid
> .......
>
> The problem is that I have to have lnid in the sub-select to allow the 'o=
n'
> clause to work, but I don't want lnid to appear in the resulting view.

Yep, so don't do "SELECT *", list the fields you want instead. The * in tha=
t=20
second line applies to the rest of the query, not just the "locos" table.

There is something to be said for a format such as "SELECT * EXCEPT lnid" b=
ut=20
I don't think it's mentioned in any sql spec.

--=20
  Richard Huxton