From: Tom Lane <tgl@sss.pgh.pa.us>
To: Thomas Munro <thomas.munro@enterprisedb.com>
Cc: Michael Paquier <michael.paquier@gmail.com>
Cc: Andrew Gierth <rhodiumtoad@postgresql.org>
Cc: PostgreSQL mailing lists <pgsql-bugs@postgresql.org>
Cc: Kevin Grittner <kgrittn@gmail.com>
Subject: Re: BUG #14808: V10-beta4, backend abort
Date: Wed, 13 Sep 2017 18:44:02 -0400
Message-ID: <31365.1505342642@sss.pgh.pa.us> (raw)
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Thomas Munro <thomas.munro@enterprisedb.com> writes:
> Aside from the RI case, the other user visible change in behaviour
> will be for statements that update the same table via multiple
> ModifyTable nodes (wCTEs). Our regression test has:
> with wcte as (insert into table1 values (42))
> insert into table2 values ('hello world');
> ... which demonstrates the fix for the original complaint that table1
> and table2 earlier tried to use the same transition table (and
> crashed).
BTW, as I'm digging around in trigger.c, I can't help noticing that
it provides a single "fdw_tuplestore" per trigger query level (a/k/a
trigger execution context). I've not tried to test this, but it
sure looks like a wCTE like your example above, directed at two
separate foreign tables with triggers, would fail for exactly the
same reason. That'd be a bug of pretty long standing.
regards, tom lane
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To: pgsql-bugs@postgresql.org
Cc: tgl@sss.pgh.pa.us, thomas.munro@enterprisedb.com, michael.paquier@gmail.com, rhodiumtoad@postgresql.org, kgrittn@gmail.com
Subject: Re: BUG #14808: V10-beta4, backend abort
In-Reply-To: <31365.1505342642@sss.pgh.pa.us>
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