On 1/11/08, alphax <alphax@xxxxxxxxxxx> wrote: > I want to compare the record's transaction id in sql statements or > PL/pgSQL stored procedure. Are there any system function or operator can > safely(transaction id wraparound safed) compare the transaction id? In 8.3 there are txid functions that export 8byte wraparound-safe transaction id, that can be safely stored in user tables: http://developer.postgresql.org/pgdocs/postgres/functions-info.html#FUNCTIONS-TXID-SNAPSHOT For 8.2 and below you can get them as external module from Skytools package: http://pgfoundry.org/projects/skytools -- marko ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match
