Re: argh... can't cast varchar to int

From: Oliver Elphick <olly(at)lfix(dot)co(dot)uk>
To: Matthew Nuzum <cobalt(at)bearfruit(dot)org>
Cc: Postgres General List <pgsql-general(at)postgresql(dot)org>
Subject: Re: argh... can't cast varchar to int
Date: 2002-11-25 02:47:57
Message-ID: 1038192476.2847.4.camel@linda.lfix.co.uk
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On Mon, 2002-11-25 at 02:28, Matthew Nuzum wrote:
> I have a table that has (among other things) two values, one named
> ftr_type and the other ftr_data.
>
> Depending on the value of ftr_type, ftr_data may contain the value of a
> primary key in another table. Because sometimes there is another table
> and sometimes there isn't, ftr_data is a varchar.
>
Why not make it integer but leave its value as NULL if there is no other
table?

Alternatively, cast it to text first:

junk=# select CAST('22'::text as int4);
int4
------
22
(1 row)

--
Oliver Elphick Oliver(dot)Elphick(at)lfix(dot)co(dot)uk
Isle of Wight, UK http://www.lfix.co.uk/oliver
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