CREATE TRIGGER CONTENT_UPDATE BEFORE UPDATE ON CONTENT
FOR EACH ROW
BEGIN
DECLARE str MEDIUMTEXT;
IF (NEW.CON_VALUE IS NULL) THEN
SET str = '';
ELSE
SET str = NEW.CON_VALUE;
END IF;
CASE (NEW.CON_CATEGORY)
WHEN 'APP_TITLE' THEN
UPDATE APP_CACHE_VIEW
SET APP_TITLE = str
WHERE APP_UID = NEW.CON_ID;
END;
WHEN 'PRO_TITLE' THEN
SET APP_PRO_TITLE = str
WHERE PRO_UID = NEW.CON_ID;
WHEN 'TAS_TITLE' THEN
SET APP_TAS_TITLE = str
WHERE TAS_UID = NEW.CON_ID;
END CASE;