Alvaro Herrera <alvhe...@2ndquadrant.com> writes:
> I think it'd be a good idea to add some more discoverability: what would
> be deleted if an object X were to be deleted?

There's plenty of discoverability already.  The documentation suggests

   (If you want to check what <command>DROP ... CASCADE</> will do,
   run <command>DROP</> without <literal>CASCADE</> and read the
   <literal>DETAIL</> output.)

Or you could do BEGIN; DROP ... CASCADE; ROLLBACK.

                        regards, tom lane


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