Re: Proposed patch to make mergejoin cost estimation more symmetric

"Tom Lane" <tgl@sss.pgh.pa.us> writes:

> Any objections to applying the patch?

I like applying it.

You don't include any negative tests and corner cases as well; cases where the
new code shouldn't be disturbing the results such as a symmetric join or a
join against a single-row table. The comments make me think you ran them but
just didn't show them though.

What about a merge join against an empty table? I suppose there would just be
no statistics?


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  Gregory Stark
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