I'm wondering why a IN b isn't equivalent to a = ANY b for arrays, as it
is for subqueries.
That is, why can't you write
SELECT 1 IN ( ARRAY[1, 2, 3] );
when you can write
SELECT 1 = ANY ( ARRAY[1, 2, 3] );
?
I'm guessing that there is a semantic inconsistency between these
expressions, as the first one considers what is in parentheses as a
list, the second one as a single expression. That would be very bad.
--
Peter Eisentraut
http://developer.postgresql.org/~petere/
