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Re: Improving planning of outer joins - Mailing list pgsql-hackers

From Tom Lane
Subject Re: Improving planning of outer joins
Date
Msg-id 28994.1134765194@sss.pgh.pa.us
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In response to Re: Improving planning of outer joins  (Alvaro Herrera <alvherre@commandprompt.com>)
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Alvaro Herrera <alvherre@commandprompt.com> writes:
> Why the thing about the mergejoinable conditions then?  Is that even
> true?

There are some things that work off mergejoinable conditions, but the
equivalence of right and left join isn't one of them ...
        regards, tom lane

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