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On 7 jan 2011, at 20:46, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> Joel Jacobson <joel(at)gluefinance(dot)com> writes:
>> The function obj_unique_identifier(oid) will return a unique name for _any_ oid.
>
> Surely this is broken by design? You can *not* assume that the same OID
> isn't in use for different things in different system catalogs. They're
> only guaranteed unique within a catalog. That's the main reason why
> pg_depend has to include the classid.
>
> regards, tom lane
Correct. That is why the regclass name (classid) is included in the unique name.