From: | Peter Eisentraut <peter_e(at)gmx(dot)net> |
---|---|
To: | pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: Weird type selection choice |
Date: | 2007-11-06 15:50:08 |
Message-ID: | 200711061650.09188.peter_e@gmx.net |
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Lists: | pgsql-hackers |
Am Dienstag, 6. November 2007 schrieb Peter Eisentraut:
> I noticed this problem in 8.2 and 8.3:
>
> pei=# select mod( trunc( 1 ), 2 );
> ERROR: 42883: function mod(double precision, integer) does not exist
> LINE 1: select mod( trunc( 1 ), 2 );
> ^
>
> It apparently casts the 1 to double precision to pick the variant
> trunc(dp)=>dp instead of trunc(numeric)=>numeric. I was under the
> impression that we didn't want to cast integers to float types implicitly
> because this loses information.
Well, duh, of course we can't disallow casting integer to float. But can we
make it prefer numeric as a target if available?
--
Peter Eisentraut
http://developer.postgresql.org/~petere/
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