Thank you David, so I am on the right track. >If you want the relation name from the OID then you'll need something >like get_rel_name().
Hm, lsyscache.c says for get_rel_name(): * NOTE: since relation name is not unique, be wary of code that uses this * for anything except preparing error messages. How do I get the schema name too, then? Call get_rel_namespace() and then get_rel_name() again with the Oid that was returned? Best regards, Ernst-Georg