Re: BUG #15577: Query returns different results when executed multiple times

From: David Rowley <david(dot)rowley(at)2ndquadrant(dot)com>
To: Andrew Gierth <andrew(at)tao11(dot)riddles(dot)org(dot)uk>
Cc: Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com>, Bartosz Polnik <bartoszpolnik(at)gmail(dot)com>, PostgreSQL mailing lists <pgsql-bugs(at)lists(dot)postgresql(dot)org>
Subject: Re: BUG #15577: Query returns different results when executed multiple times
Date: 2019-01-10 00:23:38
Message-ID: CAKJS1f_2KvhADfQ3QaUQqV02n7UjbD+adM5_aq4UiXi4Bio=bg@mail.gmail.com
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On Thu, 10 Jan 2019 at 10:04, Andrew Gierth <andrew(at)tao11(dot)riddles(dot)org(dot)uk> wrote:
> Looks like this isn't a new bug, either; I can reproduce it on 10.x.

Yeah, introduced in 9.6;

I wrote:
> 45be99f8cd Support parallel joins, and make related improvements. -- BAD
> a7de3dc5c3 Support multi-stage aggregation. -- GOOD

--
David Rowley http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services

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