Re: rows modified in current transaction

On Thursday, August 30, 2012 06:06:59 PM Robert Haas wrote:
> On Thu, Aug 30, 2012 at 10:36 AM, Miroslav Šimulčík
>
> <simulcik.miro@gmail.com> wrote:
> > is there any way to check if row have already been modified by the
> > current transaction? I tried condition txid_current() = xmin, but there
> > is problem with the savepoints. After every savepoint rows are getting
> > higher xmin values, but txid_current() remains the same.
>
> It sounds like you're looking for a function that will give an array
> of all XIDs for the current transcation, rather than just the XID of
> the current sub-transaction.  I don't think we currently expose that.
txid_current_snapshot(), txis_visible_in_snapshot() may work.

Greetings,

Andres
-- Andres Freund                       http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training &
Services