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Re: increasing collapse_limits?

From: Greg Stark <gsstark(at)mit(dot)edu>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Robert Haas <robertmhaas(at)gmail(dot)com>, Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: increasing collapse_limits?
Date: 2011-04-30 23:53:04
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
On Sat, Apr 30, 2011 at 9:21 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> - it would require a query in which
> every relation is linked to every other relation by a join clause.
> But that *can* happen (remember that clauses generated by transitive
> equality do count).

It sounds like you're describing precisely a "star schema" join which
isn't an uncommon design pattern at all.


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