cr_trigger_func_benutzer.sql
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-- Trigger Funktionen zu Kunden --
-- [
create function on_insert_create_konten()
returns TRIGGER as '
DECLARE
err_msg text;
BEGIN
IF TG_OP <> ''INSERT'' THEN
err_msg := TG_NAME || '': called for wrong action '' || TG_OP;
RAISE EXCEPTION ''%'', err_msg;
END IF;
/*
* Die funktion ins_konto uebernimmt schon alle checks bzgl.
* Des Nummernbereichs, etc. fuer uns.
*/
NEW.konto1 := fibu.ins_konto(NEW.konto1, TG_ARGV[0],
fibu.konto_typ(TG_ARGV[0]),
NULL, NULL, NULL);
IF NEW.konto1 = 0 THEN
err_msg := TG_NAME || '': cannot create debitor_kto'';
RAISE EXCEPTION ''%'', err_msg;
ELSE
PERFORM fibu.inc_konto_ref_count(NEW.konto1);
END IF;
NEW.konto2 := fibu.ins_konto(NEW.konto2, TG_ARGV[1],
fibu.konto_typ(TG_ARGV[1]),
NULL, NULL, NULL);
IF NEW.konto2 = 0 THEN
err_msg := TG_NAME || '': cannot create kreditor_kto'';
RAISE EXCEPTION ''%'', err_msg;
ELSE
PERFORM fibu.inc_konto_ref_count(NEW.konto2);
END IF;
RETURN NEW;
END;
' LANGUAGE 'plpgsql';
create function on_update_update_konten()
returns TRIGGER as '
DECLARE
err_msg text;
range fibu.kontenplan%ROWTYPE;
BEGIN
IF TG_OP <> ''UPDATE'' THEN
err_msg := TG_NAME || '': called for wrong action '' || TG_OP;
RAISE EXCEPTION ''%'', err_msg;
END IF;
IF NEW.konto1 <> OLD.konto1 THEN
NEW.konto1 := fibu.ins_konto(NEW.konto1,TG_ARGV[0],
fibu.konto_typ(TG_ARGV[0]),
NULL, NULL, NULL);
IF NEW.konto1 = 0 THEN
err_msg := TG_NAME || '': cannot create debitor_kto'';
RAISE EXCEPTION ''%'', err_msg;
ELSE
PERFORM fibu.inc_konto_ref_count(NEW.konto1);
PERFORM fibu.dec_konto_ref_count(OLD.konto1);
END IF;
END IF;
IF NEW.konto2 <> OLD.konto2 THEN
NEW.konto2 := fibu.ins_konto(NEW.konto2,TG_ARGV[1],
fibu.konto_typ(TG_ARGV[1]),
NULL, NULL, NULL);
IF NEW.konto2 = 0 THEN
err_msg := TG_NAME || '': cannot create kreditor_kto'';
RAISE EXCEPTION ''%'', err_msg;
ELSE
PERFORM fibu.inc_konto_ref_count(NEW.konto2);
PERFORM fibu.dec_konto_ref_count(OLD.konto2);
END IF;
END IF;
RETURN NEW;
END;
' LANGUAGE 'plpgsql';
create function on_delete_dec_konto_ref_count()
returns TRIGGER as '
BEGIN
PERFORM fibu.dec_konto_ref_count(OLD.konto1);
PERFORM fibu.dec_konto_ref_count(OLD.konto2);
RETURN OLD;
END;
' language 'plpgsql';
CREATE FUNCTION on_change_one_null()
RETURNS TRIGGER AS '
DECLARE
err_msg text;
BEGIN
IF TG_OP = ''INSERT'' THEN
IF (NEW.id_person IS NULL AND NEW.id_firma IS NULL) OR
(NEW.id_person IS NOT NULL AND NEW.id_firma IS NOT NULL) THEN
err_msg := TG_NAME || '': both or none are NULL'';
RAISE EXCEPTION ''%'', err_msg;
ELSE
RETURN NEW;
END IF;
END IF;
/*
* Bei einem update gibt es mehrere Moeglichkeiten:
* 1. weder id_person noch id_firma werden veraendert:
* Dann passiert in dieser Funktion gar nichts.
* 2. entweder id_person oder id_firma wird veraendert:
* - id_person oder id_firma werden gesetzt und das
* jeweils andere Feld wird auf NULL gesetzt.
* - sind nach dem update beide NULL wird das update nicht
* ausgefueht und eine Fehlermeldung ausgegeben.
* 3. beide werden verandert:
* - wird fuer beide Felder ein neuer Wert angegeben, so
* geht diese Funktion davon aus das das bisher NULL
* enthaltende Feld gesetzt werden soll (diese Situation
* sollte allerdings moeglichst immer vom Frontend abgefangen
* werden, ein Kunde kann nur entweder eine Person oder eine
* Firma sein, nicht beides.
*/
IF TG_OP = ''UPDATE'' THEN
IF OLD.id_person IS NOT NULL AND
NEW.id_firma IS NOT NULL THEN
NEW.id_person := NULL;
END IF;
IF OLD.id_firma IS NOT NULL AND
NEW.id_person IS NOT NULL THEN
NEW.id_firma := NULL;
END IF;
IF NEW.id_person IS NULL AND NEW.id_FIRMA IS NULL THEN
RAISE EXCEPTION ''change_kunde_trigger: both are NULL'';
END IF;
RETURN NEW;
END IF;
err_msg := TG_NAME || '': called for wrong action '' || TG_OP;
RAISE EXCEPTION ''%'', err_msg;
END;
' LANGUAGE 'plpgsql';
CREATE FUNCTION on_change_one_null2()
RETURNS TRIGGER AS '
DECLARE
err_msg text;
BEGIN
IF TG_OP = ''INSERT'' THEN
IF (NEW.id_person IS NULL AND
NEW.id_firma IS NULL AND
NEW.id_benutzer IS NULL) OR
(NEW.id_person IS NOT NULL AND
NEW.id_benutzer IS NOT NULL) OR
(NEW.id_firma IS NOT NULL AND
NEW.id_benutzer IS NOT NULL) OR
(NEW.id_firma IS NOT NULL AND
NEW.id_person IS NOT NULL) THEN
err_msg := TG_NAME || '': all or none are NULL'';
RAISE EXCEPTION ''%'', err_msg;
ELSE
RETURN NEW;
END IF;
END IF;
IF TG_OP = ''UPDATE'' THEN
IF OLD.id_person IS NOT NULL AND
(NEW.id_firma IS NOT NULL OR
NEW.id_benutzer IS NOT NULL) THEN
NEW.id_person := NULL;
END IF;
IF OLD.id_firma IS NOT NULL AND
(NEW.id_person IS NOT NULL OR
NEW id_benutzer IS NOT NULL) THEN
NEW.id_firma := NULL;
END IF;
IF OLD.id_benutzer IS NOT NULL AND
(NEW.id_person IS NOT NULL OR
NEW.id_firma IS NOT NULL) THEN
NEW.id_benutzer := NULL;
END IF;
IF NEW.id_person IS NULL AND
NEW.id_firma IS NULL AND
NEW.id_benutzer IS NULL THEN
RAISE EXCEPTION ''change_kunde_trigger: all are NULL'';
END IF;
RETURN NEW;
END IF;
err_msg := TG_NAME || '': called for wrong action '' || TG_OP;
RAISE EXCEPTION ''%'', err_msg;
END;
' LANGUAGE 'plpgsql';
-- ]
-- Ende Triggerfunktionen zu Kunden --