I see that subselects are not directly supported in check clauses,
but one can work around that by writing a stored function which
returns boolean and performs the subselect. Are there any known
gotchas with doing this?
The CREATE TABLE docs regarding CHECK clauses states:
"Currently, CHECK expressions cannot contain subqueries nor refer to
variables other than columns of the current row."
Is this due to someone not yet writing the necessary code to remove
the subquery clause, or is there a more fundamental reason?
----
James Robinson
Socialserve.com
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