On Jun 30, 2005, at 8:13 PM, Bernd Helmle wrote:
I currently recognized that a SERIAL column doesn't only create an
implicit sequence, it creates an implicit composite type with the
same name, too. I think this is the same for CREATE SEQUENCE?
Sequences are just special types of tables. All tables have a
corresponding composite type, so sequences do as well.
CREATE TABLE foo (foo_id serial); is a shorthand for
CREATE SEQUENCE foo_foo_id_seq;
CREATE TABLE foo (foo_id integer default nextval
('foo_foo_id_seq'::text));
Using SERIAL implies CREATE SEQUENCE.
Does this help?
Michael Glaesemann
grzm myrealbox com
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