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help / color / mirror / Atom feedFrom: Bruce Momjian <bruce@momjian.us>
To: Erik Brandsberg <erik@heimdalldata.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Martin Handsteiner <martin.handsteiner@sibvisions.com>
Cc: Simon Riggs <simon@2ndquadrant.com>
Cc: pgsql-sql@lists.postgresql.org <pgsql-sql@lists.postgresql.org>
Subject: Re: AW: Optimizer Hint, to ignore limit and offset in optimizer plan
Date: Mon, 29 Jun 2020 11:48:01 -0400
Message-ID: <20200629154801.GA17530@momjian.us> (raw)
In-Reply-To: <CAFcck8H+4kWzYTc_TFzn1GF-1u39hU66RskSVbeWr12CGnzFaQ@mail.gmail.com>
References: <VI1PR1001MB1423F5361320BB854708FD2FE8930@VI1PR1001MB1423.EURPRD10.PROD.OUTLOOK.COM>
<CANP8+jLYmta=WfEpbP-DihtNkD7VKhbEzMyOkYUjuBCvWEZfdw@mail.gmail.com>
<VI1PR1001MB1423793F6E5624602BD2DEAFE86E0@VI1PR1001MB1423.EURPRD10.PROD.OUTLOOK.COM>
<323666.1593441019@sss.pgh.pa.us>
<CAFcck8H+4kWzYTc_TFzn1GF-1u39hU66RskSVbeWr12CGnzFaQ@mail.gmail.com>
On Mon, Jun 29, 2020 at 10:33:43AM -0400, Erik Brandsberg wrote:
> New request: If order by is not specified with an order by clause, allow an
> option to be set that explicitly randomizes the results to break everything
> that relies on the order. :) This would primarily be used for QA work to find
> code that depends on an undefined order.
You mean LIMIT/OFFSET without ORDER BY? I think issuing a warning,
perhaps when some "novice" mode is enabled, would work well.
--
Bruce Momjian <bruce@momjian.us> https://momjian.us
EnterpriseDB https://enterprisedb.com
The usefulness of a cup is in its emptiness, Bruce Lee
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To: pgsql-sql@postgresql.org
Cc: bruce@momjian.us, erik@heimdalldata.com, tgl@sss.pgh.pa.us, martin.handsteiner@sibvisions.com, simon@2ndquadrant.com, pgsql-sql@lists.postgresql.org
Subject: Re: AW: Optimizer Hint, to ignore limit and offset in optimizer plan
In-Reply-To: <20200629154801.GA17530@momjian.us>
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