ALTER TABLE <mytable> DROP CONSTRAINT IF EXISTS <myconstraint> ?

Does PG have any way of doing $subject without writing a plpgsql-function
which does it by querying the catalog manually?

I'm looking for an equivalent of "DROP TABLE IF EXISTS <mytable>"

--
Andreas Joseph Krogh <andreak(at)officenet(dot)no>
Senior Software Developer / Manager
------------------------+---------------------------------------------+
OfficeNet AS | The most difficult thing in the world is to |
Karenslyst Allé 11 | know how to do a thing and to watch |
PO. Box 529 Skøyen | somebody else doing it wrong, without |
0214 Oslo | comment. |
NORWAY | |
Tlf: +47 24 15 38 90 | |
Fax: +47 24 15 38 91 | |
Mobile: +47 909 56 963 | |
------------------------+---------------------------------------------+