Hi Tom,
Thanks for your reply.
> What PG version are we talking about here?
For development I use 9.1.3, on the production server is 8.4.7 -
happens with both cases.
> That doesn't sound like a tremendously good idea to me.
Could you elaborate on the downsides of this approach a bit?
> But with
> so few details, it's hard to comment intelligently.
> Can you provide a concrete test case?
A self contained testcase would take some time to create (and list
members willing to configure and run), so I hope a query as well as an
explain-analyze run will provide more information (done with 9.1.3):
http://pastebin.com/BGRdAPg2
Its kind of the worst-worst case which I will improve later (way too
much relations loaded through join-fetching), but its quite a good way
to show the issue. Replacing the IN with a ANY(ARRAY()) already yields
a way better plan.
Thank you in advance, Clemens
