Re: idea for concurrent seqscans

From: "Jim C(dot) Nasby" <decibel(at)decibel(dot)org>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Jeff Davis <jdavis-pgsql(at)empires(dot)org>, Simon Riggs <simon(at)2ndquadrant(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: idea for concurrent seqscans
Date: 2005-02-26 00:03:53
Message-ID: 20050226000353.GQ84483@decibel.org
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On Fri, Feb 25, 2005 at 01:30:57PM -0500, Tom Lane wrote:
> Jeff Davis <jdavis-pgsql(at)empires(dot)org> writes:
> > I didn't consider that. Is there a reason the regression tests assume
> > the results will be returned in a certain order (or a consistent order)?
>
> We use diff as the checking tool.

Doesn't the SQL spec specifically state that the only time you'll get
results in a deterministic order is if you use ORDER BY? Assuming
otherwise seems a bad idea (though at least in the case of testing it
makes the test more strenuous rather than less...)
--
Jim C. Nasby, Database Consultant decibel(at)decibel(dot)org
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