On Friday, October 19, 2012 09:55:10 PM Tom Lane wrote: > FOREIGN KEY (foo, EACH ELEMENT OF bar) REFERENCES ... > > which is certainly more verbose than just "ELEMENT" but I think it > makes it clearer that each array element is required to have a match > separately. If we ever implemented the other behavior it could be > written as "ANY ELEMENT OF". > > That doesn't get us any closer to having a working column-constraint > syntax unfortunately, because EACH is not a reserved word either > so "EACH ELEMENT REFERENCES" still isn't gonna work. I'm getting > more willing to give up on having a column-constraint form of this.
What about sticking a WHERE in there? I.e. FOREIGN KEY (foo, WHERE EACH ELEMENT OF bar) ... Greetings, Andres -- Andres Freund http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
