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_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 a direct or indirect member of 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.