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'.
So if 'items' is:
id typ ----+----- 1 'a' 2 'a' 3 'a' 1 'b'
then doing:
INSERT items(typ) VALUES('a'); INSERT items(typ) VALUES('b');
will result in:
id typ ----+----- 1 'a' 2 'a' 3 'a' 1 'b' 4 'a' 2 'b'
Because there can be dozens of values of 'typ'
and new ones added not infrequently, creating
a postgresql sequence for each seems awkward.
Are there other ways I could accomplish this?
