From: Marc G. Fournier <scrappy@postgresql.org>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Andrew Dunstan <andrew@dunslane.net>
Cc: Marc G. Fournier <scrappy@postgresql.org>
Cc: pgsql-hackers@postgresql.org
Subject: Re: ALTER TABLE ( smallinto -> boolean ) ...
Date: Thu, 1 Sep 2005 19:16:38 -0300 (ADT)
Message-ID: <20050901191422.K1044@ganymede.hub.org> (raw)
In-Reply-To: <6793.1125610242@sss.pgh.pa.us>
References: <20050829201253.X1044@ganymede.hub.org>
<15013.1125359379@sss.pgh.pa.us>
<20050901174341.N1044@ganymede.hub.org>
<6399.1125608205@sss.pgh.pa.us>
<4317713C.10808@dunslane.net>
<6793.1125610242@sss.pgh.pa.us>
On Thu, 1 Sep 2005, Tom Lane wrote:
> Andrew Dunstan <andrew@dunslane.net> writes:
>> Tom Lane wrote:
>>> Sure you can. Make a SQL or PLPGSQL function that does the conversion
>>> you want and then create a cast using it.
>
>> That probably won't help him much with "values(0)":
>
> If I remember the context of the original request, it wasn't about that
> anyway, but about dealing with an existing smallint column.
Nope, actually, the original was to just convert an existing table from
using smallint->boolean, but what I'm looking at with the CREATE CAST is
to avoid reducing the # of changes that I have to make to the existing
application, so being able to auto-cast 0->'f' on an INSERT/UPDATE would
help wtih that ...
The app still needs to be fixed, but this would allow for the initial
change to be made a bit easier ...
----
Marc G. Fournier Hub.Org Networking Services (http://www.hub.org)
Email: scrappy@hub.org Yahoo!: yscrappy ICQ: 7615664
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To: pgsql-sql@postgresql.org
Cc: scrappy@postgresql.org, tgl@sss.pgh.pa.us, andrew@dunslane.net, pgsql-hackers@postgresql.org
Subject: Re: ALTER TABLE ( smallinto -> boolean ) ...
In-Reply-To: <20050901191422.K1044@ganymede.hub.org>
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