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From: aoki@cs.berkeley.edu (Paul M. Aoki)
To: Robert.Patrick@cs.cmu.edu
Cc: postgres@postgres.Berkeley.EDU
Subject: Re: More on: Limit to where clause length? 
Reply-To: aoki@cs.berkeley.edu (Paul M. Aoki)
In-reply-to: Your message of Tue, 4 Oct 1994 22:10:12 -0400 (EDT) 
	     <ciYUg4K00hMdAUgLxC@cs.cmu.edu> 
Date: Tue, 04 Oct 94 23:02:28 -0700
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Robert.Patrick@cs.cmu.edu writes:
> It appears that I can execute any combination of and's and or's in a
> where clause as long as I don't access more than 3 tables.  The minute I
> try to access 4 tables, even in a simpler query, Postgres simply returns
> an empty table, even if there are tuples which match the query.

src/examples/chapter15 contains several four-way joins.

there is no hardwired limit on the number of tables that you can 
reference in a query, though (as recently mentioned) there are some 
8kb buffers awaiting the unwary.
--
  Paul M. Aoki          |  University of California at Berkeley
  aoki@CS.Berkeley.EDU  |  Dept. of EECS, Computer Science Division (#1776) 
                        |  Berkeley, CA 94720-1776

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