I Created the next Trigger to move the data from a main table to an historical table in case of an update or insert.
CREATE OR REPLACE FUNCTION process_employee_hist() RETURNS TRIGGER AS $employee_hist$
BEGIN
IF (TG_OP = 'UPDATE') THEN
INSERT INTO employee_hist SELECT 'U', now(), user, NEW.*;
RETURN NEW;
ELSIF (TG_OP = 'INSERT') THEN
INSERT INTO employee_hist SELECT 'I', now(), user, NEW.*;
RETURN NEW;
END IF;
RETURN NULL;
END;
$employee_hist$ LANGUAGE plpgsql;
CREATE TRIGGER employee_hist
AFTER INSERT OR UPDATE ON employee
FOR EACH ROW EXECUTE PROCEDURE process_employee_hist();
This Trigger moves all data from the main table to the historical. I need only to move the updated one to the historical table.
CodePudding user response:
Try:
CREATE OR REPLACE FUNCTION process_employee_hist() RETURNS TRIGGER AS $employee_hist$
BEGIN
IF (TG_OP = 'UPDATE') THEN
INSERT INTO employee_hist SELECT 'U', now(), user, NEW.*;
RETURN NEW;
END IF;
RETURN NULL;
END;
$employee_hist$ LANGUAGE plpgsql;
CREATE TRIGGER employee_hist
AFTER UPDATE ON employee
FOR EACH ROW EXECUTE PROCEDURE process_employee_hist();