"Ragnar" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > On sun, 2007-07-15 at 09:28 -0600, Stuart McGraw wrote: > > Advice requested :-) I have a table like: > > > > CREATE TABLE items ( > > id INT, > > typ INT ... > > PRIMAY KEY (seq,typ)); > > > > I would like 'id' to be like a SERIAL except that I > > want independent sequences for each value of 'typ'. > > what possible advantage could there be to that? > > if you need gapless series, then sequences (and serial) > are not adequate anyways. > > just use one sequence.
I am not looking for gapless sequences. The reason I want to do this is the "typ" column is actually an indicator of the source of the rest of the infomation in the row. The "rules" for assigning the id number vary depending on the source -- in some cases they start at 1 and increment by one, in other cases they start at, say, 1000000 and increment by 10. There are a lot existing data using these rules and I cannot change that. I can of course have the application do the assignments, but in general eould prefer to push this down into the database if posible. ---------------------------(end of broadcast)--------------------------- TIP 2: Don't 'kill -9' the postmaster
