On Tue, Jul 05, 2005 at 09:34:51PM -0600, Roy Souther wrote: > > Is there any way to make a SELECT return an extra field that is a > sequential number for the tuples that are returned? You could use a sequence. > I am trying to populate a table with an INSERT SELECT and would like to > make one of the fields a sequence starting with 1 for the first tuple > and incromenting. I don't want the field to be a unique index. As the > query is run again and again I want more tuples appended to the table > and each time the counter should start at 1 and count up. 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. -- Michael Fuhr http://www.fuhr.org/~mfuhr/ ---------------------------(end of broadcast)--------------------------- TIP 8: explain analyze is your friend
