Re: BUG #8410: out of binary heap slots - Mailing list pgsql-bugs

From Andres Freund
Subject Re: BUG #8410: out of binary heap slots
Date
Msg-id 20130830214429.GE8932@awork2.anarazel.de
Whole thread Raw
In response to Re: BUG #8410: out of binary heap slots  (Andres Freund <andres@2ndquadrant.com>)
Responses Re: BUG #8410: out of binary heap slots
List pgsql-bugs
On 2013-08-30 23:05:25 +0200, Andres Freund wrote:
> On 2013-08-30 23:00:15 +0200, Andres Freund wrote:
> > Hi,
> >
> >
> > On 2013-08-30 20:46:27 +0000, terje@elde.net wrote:
> > > I'm getting "out of binary heap slots", which offcourse spoils the fun of
> > > the query.
> >
> > > Explain analyze gives this plan (again anonymized a bit, but can send proper
> > > off-list):
> >
> > Since I reviewed the patch that introduced that message, I'd be
> > interested in getting that. Ideally in a state where I can reproduce the
> > issue in a new cluster.
>
> No need, found the bug. And I think can build a testcase myself.
>
> ExecReScanMergeAppend resets ms_initialized, but doesn't clear the
> binaryheap. Thus no new elements fit.

Ok, patch for that attached. Should we add
SELECT (SELECT g.i FROM ((SELECT random()::int ORDER BY 1 OFFSET 0) UNION ALL (SELECT random()::int ORDER BY 1 OFFSET
0))f(i) ORDER BY f.i LIMIT 1) FROM generate_series(1, 10) g(i); 
as a regression test? I slightly on the "no" side...

Greetings,

Andres Freund

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

Attachment

pgsql-bugs by date:

Previous
From: Terje Elde
Date:
Subject: Re: BUG #8410: out of binary heap slots
Next
From: Andres Freund
Date:
Subject: Re: BUG #8410: out of binary heap slots