ALTER TABLE ONLY global_disciplines
    DROP CONSTRAINT global_extid_key;

ALTER TABLE ONLY global_disciplines
    ADD CONSTRAINT global_extid_semester_key UNIQUE (externalid, semesterid);

CREATE OR REPLACE FUNCTION public.discipline_bindglobal(pdisciplineid integer, psemester integer, pdisciplinename character varying, pglobalid character varying)
    RETURNS integer
    LANGUAGE plpgsql
AS $function$
declare vID int;
begin
    INSERT INTO global_disciplines (disciplineid, semesterid, name, externalid) VALUES(pdisciplineid, psemester, pdisciplinename, pglobalid)  returning id into vID;
    UPDATE disciplines SET isglobal=TRUE WHERE disciplines.id = pdisciplineid;
    RETURN vID;
END;
$function$;