| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
| Cc: | Christian Schröder <cs(at)deriva(dot)de>, pgsql-hackers(at)postgreSQL(dot)org |
| Subject: | Re: [GENERAL] Performance of full outer join in 8.3 |
| Date: | 2009-04-15 22:04:13 |
| Message-ID: | 1344.1239833053@sss.pgh.pa.us |
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| Lists: | pgsql-general pgsql-hackers |
Simon Riggs <simon(at)2ndQuadrant(dot)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.
regards, tom lane
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