>
> Uh, txid_current returns a 64 bit value, whereas xmin only stores the 32
> least significant bits. They would certainly differ after a xid
> wraparound.
>
> --
> Álvaro Herrerahttp://www.2ndQuadrant.com/
> PostgreSQL Development, 24x7 Support, Training & Services
>
Ah yes...
I am trying to make a trigger that updates a row once and only once per
transaction (even if this trigger gets fired multiple times). The general
idea is that for a user we have a version number. When we modify the
user's data, the version number is incremented then set on the object. We
only ne
