Re: "could not open relation 1663/16384/16584: No such file or directory" in a specific combination of transactions with temp tables

Added to TODO:

* Allow prepared transactions with temporary tables created and dropped in the same transaction, and when an ON COMMIT
DELETEROWS temporary table is accessed
 
 http://archives.postgresql.org/pgsql-hackers/2008-03/msg00047.php


---------------------------------------------------------------------------

Heikki Linnakangas wrote:
> Bruce Momjian wrote:
> > Tom Lane wrote:
> >> "Heikki Linnakangas" <heikki@enterprisedb.com> writes:
> >>> John Smith wrote:
> >>>> [3] I am not certain how widespread they might be, but I think there
> >>>> may be some backward compatibility concerns with the patch you are
> >>>> proposing.
> >>> Well, the current behavior is certainly broken, so an application 
> >>> relying on it is in trouble anyway :-(. Even if we came up with a patch 
> >>> for 8.4 to relax the limitation, I doubt it would be safe enough to 
> >>> backport to stable branches.
> >> As Heikki pointed out later, PG 8.1 correctly enforces the restriction
> >> against preparing a transaction that has dropped a temp table.  It's
> >> only 8.2.x and 8.3.0 that (appear to) allow this.  So I'm not persuaded
> >> by backwards-compatibility arguments.
> >>
> >> I've applied Heikki's new patch, and I think that's as much as we can do
> >> for 8.2 and 8.3.  Any improvement in the functionality would be new
> >> development (and not trivial development, either) for 8.4 or later.
> > 
> > Is there a TODO here?
> 
> Yes, please:
> 
> "Allow two-phase commit when a temporary table is created and dropped in 
> the same transaction, or when an ON COMMIT DELETE ROWS temporary table 
> is accessed"
> 
> Hmm. If we can do that, I guess we could allow read-only queries on temp 
> tables as well.
> 
> -- 
>    Heikki Linnakangas
>    EnterpriseDB   http://www.enterprisedb.com

--  Bruce Momjian  <bruce@momjian.us>        http://momjian.us EnterpriseDB
http://enterprisedb.com
 + If your life is a hard drive, Christ can be your backup. +