Re: IN joining

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Dennis Haney <davh(at)diku(dot)dk>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: IN joining
Date: 2004-03-05 23:08:55
Message-ID: 12170.1078528135@sss.pgh.pa.us
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Dennis Haney <davh(at)diku(dot)dk> writes:
>> Joining {b,c} to {a} does not meet any of those four allowed cases.
>>
> Exactly my point... So why ever bother creating the {b,c} node which is
> legal by the above definition?

We don't, because there is no such join clause.

regards, tom lane

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