| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Peter Geoghegan <pg(at)heroku(dot)com>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi>, Jeff Janes <jeff(dot)janes(at)gmail(dot)com>, Stephen Frost <sfrost(at)snowman(dot)net>, Dean Rasheed <dean(dot)a(dot)rasheed(at)gmail(dot)com>, Bruce Momjian <bruce(at)momjian(dot)us>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: INSERT ... ON CONFLICT UPDATE/IGNORE 4.0 |
| Date: | 2015-05-08 18:35:04 |
| Message-ID: | 20150508183504.GU12950@alap3.anarazel.de |
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| Lists: | pgsql-admin pgsql-hackers |
On 2015-05-08 14:30:46 -0400, Tom Lane wrote:
> Maybe just hold an open transaction in another session while you do what
> the regression test does? I think this is probably not a matter of CCA
> per se but just timing. It's unfortunate that the test in question is
> run serially without other transactions occurring concurrently, as that
> would likely have exposed the problem far sooner.
I think Peter (on IM) just found a more likely explanation than mine.
index_close(idxRel, NoLock);
heap_close(relation, NoLock);
candidates = lappend_oid(candidates, idxForm->indexrelid);
...
Yes. idxForm points into idxRel->rd_index.
He's working on a fix for both this and removal of the still unnecessary
indcheckxmin check.
Greetings,
Andres Freund
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