--- /dev/null
+-- @tag: time_recordings_date_duration
+-- @description: Erweiterung Zeiterfassung um Datum und Dauer
+-- @depends: time_recordings2
+
+ALTER TABLE time_recordings ADD COLUMN date DATE;
+ALTER TABLE time_recordings ADD COLUMN duration INTEGER;
+
+UPDATE time_recordings SET date = start_time::DATE;
+ALTER TABLE time_recordings ALTER COLUMN start_time DROP NOT NULL;
+ALTER TABLE time_recordings ALTER COLUMN date SET NOT NULL;
+
+UPDATE time_recordings SET duration = EXTRACT(EPOCH FROM (end_time - start_time))/60;
+
+-- trigger to set date from start_time
+CREATE OR REPLACE FUNCTION time_recordings_set_date_trigger()
+RETURNS TRIGGER AS $$
+ BEGIN
+ IF NEW.start_time IS NOT NULL THEN
+ NEW.date = NEW.start_time::DATE;
+ END IF;
+ RETURN NEW;
+ END;
+$$ LANGUAGE plpgsql;
+
+CREATE TRIGGER time_recordings_set_date BEFORE INSERT OR UPDATE ON time_recordings FOR EACH ROW EXECUTE PROCEDURE time_recordings_set_date_trigger();
+
+-- trigger to set duration from start_time and end_time
+CREATE OR REPLACE FUNCTION time_recordings_set_duration_trigger()
+RETURNS TRIGGER AS $$
+ BEGIN
+ IF NEW.start_time IS NOT NULL AND NEW.end_time IS NOT NULL THEN
+ NEW.duration = EXTRACT(EPOCH FROM (NEW.end_time - NEW.start_time))/60;
+ END IF;
+ RETURN NEW;
+ END;
+$$ LANGUAGE plpgsql;
+
+CREATE TRIGGER time_recordings_set_duration BEFORE INSERT OR UPDATE ON time_recordings FOR EACH ROW EXECUTE PROCEDURE time_recordings_set_duration_trigger();