Re: inconsistency in aliasing

--- On Wed, 1/14/09, Louis-David Mitterrand <vindex+lists-pgsql-general(at)apartia(dot)org> wrote:

> From: Louis-David Mitterrand <vindex+lists-pgsql-general(at)apartia(dot)org>
> Subject: Re: [GENERAL] inconsistency in aliasing
> To: pgsql-general(at)postgresql(dot)org
> Date: Wednesday, January 14, 2009, 11:27 AM
> On Wed, Jan 14, 2009 at 12:06:47PM +0100, A. Kretschmer
> wrote:
> > In response to Louis-David Mitterrand :
> > > Hi,
> > >
> > > This works:
> > >
> > > critik=# select current_timestamp::abstime::int4
> as score order by score;
> > >
> > > This doesn't:
> > >
> > > critik=# select current_timestamp::abstime::int4
> as score order by score + 1;
> > > ERROR: column "score" does not exist
> > > LINE 1: ...urrent_timestamp::abstime::int4 as
> score order by score + 1 ...
> > >
> > > Any idea ?
> >
> > Yes, you can't use the alias in the ORDER BY. Use
> the real column-name.
> >
> > select current_timestamp::abstime::int4 as score order
> by
> > current_timestamp::abstime::int4;
>
> Did you try
>
> "select current_timestamp::abstime::int4 as score
> order by score;" ?
>
> This seems to be an "order by <alias>"
>
> --
> http://www.critikart.net
>

you can't use operator in the group by, try this

select score,score+1 as score2 from (
select current_timestamp::abstime::int4 as score)
order by score2