From: Tom Lane <tgl@sss.pgh.pa.us>
To: Marc G. Fournier <scrappy@postgresql.org>
Cc: pgsql-hackers@postgresql.org
Subject: Re: ALTER TABLE ( smallinto -> boolean ) ...
Date: Mon, 29 Aug 2005 19:49:39 -0400
Message-ID: <15013.1125359379@sss.pgh.pa.us> (raw)
In-Reply-To: <20050829201253.X1044@ganymede.hub.org>
References: <20050829201253.X1044@ganymede.hub.org>
"Marc G. Fournier" <scrappy@postgresql.org> writes:
> # ALTER TABLE table ALTER COLUMN field1 type boolean;
> ERROR: column "field1" cannot be cast to type "pg_catalog.bool"
> Should this not work?
No, because there's no built-in cast from smallint to bool. You could
do something like
... type boolean using case when field1=0 then false else true end;
regards, tom lane
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To: pgsql-sql@postgresql.org
Cc: tgl@sss.pgh.pa.us, scrappy@postgresql.org, pgsql-hackers@postgresql.org
Subject: Re: ALTER TABLE ( smallinto -> boolean ) ...
In-Reply-To: <15013.1125359379@sss.pgh.pa.us>
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