| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
| Cc: | Amit Langote <Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp>, Andres Freund <andres(at)2ndquadrant(dot)com>, Kouhei Kaigai <kaigai(at)ak(dot)jp(dot)nec(dot)com>, Amit Langote <amitlangote09(at)gmail(dot)com>, Fabrízio Mello <fabriziomello(at)gmail(dot)com>, Thom Brown <thom(at)linux(dot)com>, Stephen Frost <sfrost(at)snowman(dot)net>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Parallel Seq Scan |
| Date: | 2015-03-13 13:45:19 |
| Message-ID: | CA+TgmoZOe0v6j8NgTFe48oFMx2LYjWJN=_f8e_QLEa7CEM2HVQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Fri, Mar 13, 2015 at 7:01 AM, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
> I think this can happen if funnel->nextqueue is greater than
> funnel->nqueues.
> Please see if attached patch fixes the issue, else could you share the
> scenario in more detail where you hit this issue.
Speaking as the guy who wrote the first version of that code...
I don't think this is the right fix; the point of that code is to
remove a tuple queue from the funnel when it gets detached, which is a
correct thing to want to do. funnel->nextqueue should always be less
than funnel->nqueues; how is that failing to be the case here?
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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