Re: INSERT ... ON CONFLICT UPDATE/IGNORE 4.0

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