On Thu, 29 Aug 2002, Josh Berkus wrote: > Joe, > > > We are attempting to move a couple of systems from Oracle to Postgres but > can not do so without application rewrites due to the current use of views > with UNIONs and the criticality of the performances of these views. > > > > I was wondering if a decision has been made on the optimization with the > UNION clause in views. There are many documents in the SQL archive showing > that the "push down" is not occuring and thus the use of UNION's in views is > limited to case where the data set is small or performance is not a > consideration. I also looked through the TODO list and didn't see anything > (of course I could have missed references). > > I'd take this up on PGSQL-HACKERS. The UNION VIEW optimization, last I > checked, was stalled mainly because nobody wanted to work on it. Maybe you > can?
Tom sent a patch to -patches against then cvs head that did union/intersect [all] push down last week. Unless someone comes up with a complaint, I'd guess that's going to make it in 7.3 ---------------------------(end of broadcast)--------------------------- TIP 6: Have you searched our list archives? http://archives.postgresql.org
