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Re: Question about explain of index scan - Mailing list pgsql-hackers

From Tom Lane
Subject Re: Question about explain of index scan
Date
Msg-id 14337.1125673404@sss.pgh.pa.us
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In response to Re: Question about explain of index scan  (Alvaro Herrera <alvherre@alvh.no-ip.org>)
Responses Re: Question about explain of index scan
Re: Question about explain of index scan
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Alvaro Herrera <alvherre@alvh.no-ip.org> writes:
> I wonder why we don't support more operators on Xid, so these things are
> avoided?  Right now we only have =, AFAIR.

I once started to make a btree opclass for XID, and stopped when it
occurred to me that XID comparison doesn't obey the transitive law.
btree won't like that...
        regards, tom lane

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