> I thought the syntax came from Berkeley.  We can add ALSO if folks like
> it.  I can't think of cases where we have keywords for both on and off
> behavior, and allow a default if the keyword is missing.

ALTER TABLE ... DROP CONSTRAINT ... [ RESTRICT | CASCADE ]

CREATE TABLE ... [ WITH OIDS | WITHOUT OIDS ]

CREATE USER [ CREATEDB | NOCREATEDB ] ...

IMHO, from the language design point of view, it seems better if all
options have a name.

-- 
Fabien.

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