Re: Improving planning of outer joins

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
Cc: pgsql-hackers(at)postgreSQL(dot)org
Subject: Re: Improving planning of outer joins
Date: 2005-12-16 20:33:14
Message-ID: 28994.1134765194@sss.pgh.pa.us
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Alvaro Herrera <alvherre(at)commandprompt(dot)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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