CREATE 【    】 tri_insert_update 
AFTER 【    】 ON t_line 
FOR EACH ROW 
BEGIN
    IF EXISTS (SELECT 1 FROM t_characters WHERE cid = 【    】) THEN
        UPDATE t_characters
        【    】 line_count = 【    】 + 1
        WHERE cid = NEW.cid;
    END IF;
END