klienta_nr
任务是更新位于表中的列中的特定行klientu_ieteikumi
。klienti
如果在表中删除了特定行。此代码更新整列而不是特定行。问题是什么?
CREATE FUNCTION "funkc"() RETURNS "opaque" AS '
DECLARE
BEGIN
IF (TG_OP = ''DELETE'') THEN
UPDATE klientu_ieteikumi SET klienta_nr = NULL ;
END IF;
RETURN NEW;
END;
' LANGUAGE 'plpgsql';
CREATE TRIGGER "triger"
AFTER DELETE ON "klienti"
FOR EACH ROW EXECUTE PROCEDURE funkc();
这个做了我想要的,无论如何谢谢大家:)
CREATE FUNCTION "funkcija1"() RETURNS TRIGGER AS $$
BEGIN
UPDATE klientu_ieteikumi SET klienta_nr = NULL
FROM klienti WHERE old.klienta_nr = klientu_ieteikumi.klienta_nr;
RETURN NEW;
END;
$$ LANGUAGE plpgsql;
CREATE TRIGGER "trigeris"
AFTER DELETE ON "klienti"
FOR EACH ROW EXECUTE PROCEDURE funkcija1();