On Sat, Oct 17, 2009 at 9:41 PM, Tom Lane <t...@sss.pgh.pa.us> wrote: > I've been thinking about this since your earlier mail, and I think it > would probably be possible to suppress unused columns in a non-flattened > subquery. I remain unconvinced that it's worth the trouble though. > A real (not handwavy) example would help make the case here.
Are there any situations where this would enable join removal that otherwise wouldn't be possible? Maybe a query involving an unflattenable VIEW? ...Robert -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
