Re: [GENERAL] Change location of function/type installed from C-extension

Dmitry Lazurkin <dilaz03@gmail.com> writes:
> select relname, relfilenode from pg_class where relfilenode = 11829;
>  relname | relfilenode
> ---------+-------------
> (0 rows)

> Hmmm. Where is table with filenode 11829?

pg_class.relfilenode doesn't contain useful data for pg_proc and some other
critical system catalogs:

regression=# select relname, relfilenode from pg_class where relname like 'pg_proc%';
            relname             | relfilenode
--------------------------------+-------------
 pg_proc_oid_index              |           0
 pg_proc                        |           0
 pg_proc_proname_args_nsp_index |           0
(3 rows)

You need to use pg_relation_filenode():

regression=# select relname, pg_relation_filenode(oid) from pg_class where relname like 'pg_proc%';
            relname             | pg_relation_filenode
--------------------------------+----------------------
 pg_proc_oid_index              |                12662
 pg_proc                        |                12657
 pg_proc_proname_args_nsp_index |                12663
(3 rows)

            regards, tom lane