Re: ERROR: type "temp_gc" already exists

From: Janning Vygen <vygen(at)gmx(dot)de>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: ERROR: type "temp_gc" already exists
Date: 2005-09-15 08:24:42
Message-ID: 200509151024.43282.vygen@gmx.de
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> Janning Vygen <vygen ( at ) gmx ( dot ) de> writes:
> > Am Samstag, 10. September 2005 18:05 schrieb Tom Lane:
> >> If there's no pg_depend entry then DROP TYPE should work. Otherwise
> >> you might have to resort to manually DELETEing the pg_type row.
>
> > Thanks for your detailed answer. I don't want to do anything wrong. To be
> > sure, i have some more questions:
>
> > - There is no entry in pg_depend. Should i just drop the entry from
pg_type or
> > should i REINDEX anyway?
>
> Well, what did you do to check that there was no entry? If the index is
> corrupt and you issued a query that used the index, it might have failed
> to find an entry that's actually there in the table (in fact, if we're
> assuming the DROP TYPE didn't happen because the system didn't find the
> dependency row while dropping the table, this is pretty much exactly
> what you'd expect). I'd REINDEX and then check again.

What i did so far:

$ REINDEX TABLE pg_depend

$ SELECT * from pg_depend where objid = 16562879;
classid | objid | objsubid | refclassid | refobjid | refobjsubid | deptype
---------+-------+----------+------------+----------+-------------+---------
(0 rows)

$ SELECT * from pg_type where typname = 'temp_gc';
typname | typnamespace | typowner | typlen | typbyval | typtype | typisdefined
| typdelim | typrelid | typelem | typinput | typoutput | typreceive |
typsend | typanalyze | typalign | typstorage | typnotnull | typbasetype |
typtypmod | typndims | typdefaultbin | typdefault
---------+--------------+----------+--------+----------+---------+--------------+----------+----------+---------+-----------+------------+-------------+-------------+------------+----------+------------+------------+-------------+-----------+----------+---------------+------------
temp_gc | 16847 | 100 | -1 | f | c | t
| , | 16562879 | 0 | record_in | record_out | record_recv |
record_send | - | d | x | f | 0 |
-1 | 0 | |
(1 row)

$ DROP TYPE temp_gc;
ERROR: type "temp_gc" does not exist

> If there's no pg_depend entry then DROP TYPE should work. Otherwise
> you might have to resort to manually DELETEing the pg_type row.

There is no pg_depend entry as far as i can tell, but DROP TYPE doesn't work.
Can i just DELETE the pg_type row now??

Sorry for asking again and again, but manipulating system catalogs seems to me
very dangerous. It's live database and i dont want to do anything wrong.

kind regards
Janning

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