Just out of curiosity, how does postgres assign serial primary key identifiers when rows are inserted in multiple, separate working sessions? I'm populating tables using INSERT INTO statements in separate working sessions and see that the assigned id numbers are sequential in each session, but have large gaps from one session to the next. I don't care what id numbers are assigned yet would like to know how the starting number for each session is determined, just because I expected the numbers to be continuous. Regards, Rich
