On Tue, Jul 05, 2005 at 09:55:48PM -0600, Michael Fuhr wrote: > > You could reset a sequence's start value before each insert. You > might even be able to it automagically with a statement-level before > trigger that resets the sequence value and a DEFAULT expression or > row-level trigger that uses nextval() to obtain the next sequence > value. That appears to work in simple tests, although I admittedly > haven't thought it through very far to see if there would be any > problems.
One problem would involve concurrent inserts obtaining values from the same sequence; I think using a temporary (i.e., session-local) sequence should mitigate that problem. You could create the sequence in a statement-level before trigger and drop it in a statement-level after trigger to make its use somewhat invisible. But again, I've only done this in simple tests, so it deserves more thought. -- Michael Fuhr http://www.fuhr.org/~mfuhr/ ---------------------------(end of broadcast)--------------------------- TIP 7: don't forget to increase your free space map settings
