On 9/15/07, Panagiwths Pediadiths <pped@xxxxxxxxxxxx> wrote: > Shouldn't the serializable level prevent these duplicates? As I understand > it serializable > should give the same result as if the transactions were performed the one > after the other. http://www.postgresql.org/docs/8.2/static/transaction-iso.html#MVCC-SERIALIZABILITY ---------------------------(end of broadcast)--------------------------- TIP 6: explain analyze is your friend