On Wed, Apr 25, 2012 at 10:33:10AM +0000, atrig...@ccs.neu.edu wrote:
> Seeing as Postgres does not allow sub-queries in CHECK constraints yet, it
> doesn't make any sense to me for it to allow function calls, since functions
> can perform queries. Additionally, if a function is called from a check
> constraint and that function executes a query, the change that caused the
> check constraint to fire does not appear to be "visible" to the query.
> Therefore, calling functions in check constraints does not have the ability
> to check whether that change is valid, making it mostly useless.
I fail to see how's that a bug. Using functions in check has uses, and
the fact that you don't suit your particular case (or you don't know how
to make them suit your case) is not a bug in Pg.
Best regards,
depesz
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