Merlin Moncure <mmonc...@gmail.com> writes:
> Problem could also be no statistics (run ANALYZE to test) or some
> other configuration problem (like index locale), or a bona fide
> regression.

I'm wondering about join_collapse_limit in particular --- if that wasn't
cranked up in the 9.1 installation, it would be pure luck if you got a
good query plan for an example like this.  Maybe that and/or other
parameter settings didn't get transposed to the 9.2 installation.

                        regards, tom lane


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