On Fri, Aug 5, 2016 at 4:24 PM, Christian Ohler <ohler@xxxxxxxxx> wrote: Your check for a exclusive self-lock on transactionid should work. It may be possible to find a way to do it that is less expensive, so I would definitely encapsulate that in a function; but off-hand I'm not thinking of a better way. You might be tempted to use the txid_current() function, but note that it assigns a transaction ID if there is not yet one assigned. That has prevented that function from being useful to me in every case I've considered it so far; I wish we had a function that told the current transaction ID and just returned NULL if none has yet been assigned. I'm not sure what the best name would be for such a function when we already have a function called txid_current() which does something different from that. -- Kevin Grittner EDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
