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 Herrera http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services
Ah yes... That would be a problem. What about using just the lower 32 bits of the txid_current?