Re: Pushing LIMIT into sub-queries of a UNION ALL?

Dave,

how often do you want to repeat that posting?  What about instead
replying to the answers you got so far?

Cheers

robert


On Tue, May 17, 2011 at 5:31 PM, Dave Johansen <davejohansen@gmail.com> wrote:
> I am using Postgres 8.3 and I have an issue very closely related to the one
> described here:
> http://archives.postgresql.org/pgsql-general/2005-06/msg00488.php
>
> Basically, I have a VIEW which is a UNION ALL of two tables but when I do a
> select on the view using a LIMIT, it scans the entire tables and takes
> significantly longer than writing out the query with the LIMITs in the
> sub-queries themselves. Is there a solution to get the view to perform like
> the sub-query version?
>
> Thanks,
> Dave



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