From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
---|---|
To: | Michael Paquier <michael(dot)paquier(at)gmail(dot)com> |
Cc: | Ben Chobot <bench(at)silentmedia(dot)com>, PostgreSQL mailing lists <pgsql-bugs(at)postgresql(dot)org>, Andres Freund <andres(at)anarazel(dot)de> |
Subject: | Re: pg_logical_slot_peek_changes crashes postgres when called from inside pl/pgsql |
Date: | 2017-10-05 15:38:40 |
Message-ID: | 8637.1507217920@sss.pgh.pa.us |
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Lists: | pgsql-bugs |
Michael Paquier <michael(dot)paquier(at)gmail(dot)com> writes:
> This looks like a legit bug to me. Andres, any opinions?
I wonder why ReorderBufferCommit does this:
if (using_subtxn)
BeginInternalSubTransaction("replay");
else
StartTransactionCommand();
and then tries to clean that up with this brain-dead-looking sequence:
AbortCurrentTransaction();
/* make sure there's no cache pollution */
ReorderBufferExecuteInvalidations(rb, txn);
if (using_subtxn)
RollbackAndReleaseCurrentSubTransaction();
Shouldn't that be something like
if (using_subtxn)
RollbackAndReleaseCurrentSubTransaction();
else
AbortCurrentTransaction();
? Although by this theory, the using_subtxn path has never worked,
not even a little bit, which seems somewhat unlikely.
regards, tom lane
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