From: Tom Lane <tgl@sss.pgh.pa.us>
To: Albe Laurenz <laurenz.albe@wien.gv.at>
Cc: Rajagopalan, Jayashree *EXTERN* <Jayashree.Rajagopalan@emc.com>
Cc: pgsql-admin@postgresql.org <pgsql-admin@postgresql.org>
Subject: Re: Casting bytea to varchar
Date: Tue, 15 Jan 2013 10:40:00 -0500
Message-ID: <25980.1358264400@sss.pgh.pa.us> (raw)
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Albe Laurenz <laurenz.albe@wien.gv.at> writes:
> You cannot specify a conversion function while altering
> a column's type, you'd have to use a new column like this:
Sure you can; that's the whole point of the USING option.
It'd look something like
ALTER TABLE test ALTER COLUMN val TYPE varchar(255) USING convert(val);
with whatever is appropriate in place of convert().
But the real question of course is what is "appropriate" for the OP's
situation --- he didn't specify exactly what he's got in his bytea
column or how that should be converted to varchar.
regards, tom lane
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To: pgsql-admin@postgresql.org
Cc: tgl@sss.pgh.pa.us, laurenz.albe@wien.gv.at, Jayashree.Rajagopalan@emc.com
Subject: Re: Casting bytea to varchar
In-Reply-To: <25980.1358264400@sss.pgh.pa.us>
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