Re: obj_unique_identifier(oid)

On Sat, 2011-01-08 at 22:21 +0100, Joel Jacobson wrote:
> 2011/1/8 Robert Haas <robertmhaas@gmail.com>:
> > I don't think your analysis is correct.  Each entry in pg_depend
> > represents the fact that one object depends on another object, and an
> > object could easily depend on more than one other object, or be
> > depended upon by more than one other object, or depend on one object
> > and be depended on by another.
> 
> What does that have to do with this?
> 
> Two different oids represents two different objects, right?
> Two different objects should have two different descriptions, right?
> Otherwise I cannot see how one can argue the description being unique.
> 
> The pg_describe_object returns unique descriptions for all object
> types, except for the 5 types I unexpectedly found.

I can confirm it has nothing to do with pg_depend, and that it seems to
be a bug with that descriptions do not seem to care about different 
amproclefttype and amprocrighttype.

SELECT array_agg(oid), array_agg(amproclefttype) FROM pg_amproc GROUP BY
pg_catalog.pg_describe_object(2603,oid,0) HAVING count(*) > 1;

One example row produced by that query.
  array_agg   |  array_agg  
---------------+-------------{10608,10612} | {1009,1015}
(1 row)

Regards,
Andreas Karlsson