ALTER LARGE OBJECT ALTER LARGE OBJECT 7 SQL - Language Statements ALTER LARGE OBJECT change the definition of a large object ALTER LARGE OBJECT large_object_oid OWNER TO { new_owner | CURRENT_ROLE | CURRENT_USER | SESSION_USER } ALTER LARGE OBJECT changes the definition of a large object. You must own the large object to use ALTER LARGE OBJECT. To alter the owner, you must also be able to SET ROLE to the new owning role. (However, a superuser can alter any large object anyway.) Currently, the only functionality is to assign a new owner, so both restrictions always apply. large_object_oid OID of the large object to be altered new_owner The new owner of the large object There is no ALTER LARGE OBJECT statement in the SQL standard.