On Wed, Apr 15, 2009 at 6:04 PM, Tom Lane <t...@sss.pgh.pa.us> wrote: > Simon Riggs <si...@2ndquadrant.com> writes: >> I've always been scared to ask this question, in case the answer is No, >> but: Do we have a set of regression tests for the optimizer anywhere? > > Nothing beyond what is in the standard tests. While that's okay at > catching wrong answers --- and we have memorialized a number of such > issues in the tests --- the framework is not good for catching things > that run slower than they ought.
We could add some regression tests that create a sample data set, ANALYZE it, and then EXPLAIN various things. The results should be deterministic, but creating a reasonably comprehensive set of tests might be a fair amount of work, and would likely add significantly to the runtime of the tests. Maybe it would need to be a separate suite just for optimizer testing. ...Robert -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
