Re: [HACKERS] How does postgres store the join predicate for a relation in a given query

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От Tom Lane
Тема Re: [HACKERS] How does postgres store the join predicate for a relation in a given query
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Msg-id 28956.1507836136@sss.pgh.pa.us
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Ответ на Re: [HACKERS] How does postgres store the join predicate for arelation in a given query  (Gourav Kumar <gourav1905@gmail.com>)
Ответы Re: [HACKERS] How does postgres store the join predicate for arelation in a given query  (Gourav Kumar <gourav1905@gmail.com>)
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Gourav Kumar <gourav1905@gmail.com> writes:
> A Join clause/predicate will only mention 2 relations. It can't have 3 or
> more relations.

Really?  What of, say,
select ... from a,b,c where (a.x + b.y) = c.z;
        regards, tom lane


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