Hello list, we have a database with several tables containing blobs (as oid), that reference large objects in pg_largeobject. It is my understanding, that the large objects will not be deleted if a row containing the oid is deleted - you have to do that yourself in application logic. (please correct me if wrong) I think we might not have done that consistently in the past.
Is it safe to assume that pg_largeobject only contains large objects added by application code, or might there be any postgresql-internal objects? Providing that all BLOB colums are of type oid, I was thinking of getting the fields with select table_name,column_name from information_schema.columns where data_type = 'oid' and table_name not like 'pg_%' and table_name not like '_pg%'; to create a select comum1 from table1 UNION select column2 from table2... and comparing the output with select distinct loid from pg_largeobject and subsequently deleting the abandoned ones. Though we do have backups of course I'm afraid I might be missing something... regards Tobias
