On Fri, Sep 24, 2010 at 5:05 PM, Tom Lane <t...@sss.pgh.pa.us> wrote:
> It's not that hard if you just tweak equivclass.c to make the order of
> equivalence-class lists different, viz
> Since the order of equivalence-class member lists isn't supposed to be
> semantically significant, I claim that the code in createplan has to
> be able to deal with this.
> That's not a reason for it not to handle
> the case, though.

I'm not disputing that those tests are correct.  All I'm saying is
that I can't figure out a way to write regression tests that fail if
they are removed.

Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise Postgres Company

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