Re: Getting result set metadata without executing query? - Mailing list pgsql-novice

I have.....


SELECT * FROM foo where true = false;


Is this as good as the answer below or does it do an entire table scan?


Cheers


Tom Ansley

On Wednesday 10 July 2002 07:45 am, Tom Lane wrote:
> Marc Ramirez <mrami@mrami.homeunix.org> writes:
> > Is this possible with PostgreSQL?
>
> SELECT * FROM foo LIMIT 0
>
> works in recent releases, though I think not before 7.1 or so.
>
> You'd want to avoid anything that involves a SORT step, though,
> since it's not truly "not executing the query", just abandoning
> it as soon as the first output row has been generated internally.
>
>             regards, tom lane
>
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