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Re: Proposed patch to make mergejoin cost estimation more symmetric - Mailing list pgsql-patches

From Tom Lane
Subject Re: Proposed patch to make mergejoin cost estimation more symmetric
Date
Msg-id 19673.1197039312@sss.pgh.pa.us
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In response to Re: Proposed patch to make mergejoin cost estimation more symmetric  (Gregory Stark <stark@enterprisedb.com>)
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Gregory Stark <stark@enterprisedb.com> writes:
> What about a merge join against an empty table? I suppose there would just be
> no statistics?

Yeah.  The defenses against silly results in mergejoinscansel should be
enough to prevent it from doing anything really insane.

            regards, tom lane

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