刪除表資料的儲存過程, 可用於定時任務, 以達到定時清理資料的需求

DROP PROCEDURE procedure_table_clean;
CREATE PROCEDURE procedure_table_clean()
BEGIN
    DECLARE no_more_record integer DEFAULT 0;
    DECLARE id varchar(36);
    DECLARE num integer default 0;
    DECLARE cur_record CURSOR FOR SELECT UUID FROM table_1;

    DECLARE CONTINUE HANDLER FOR NOT FOUND SET no_more_record = 1; # 當沒有記錄時賦值為1
    OPEN cur_record;
    FETCH cur_record INTO id;
    WHILE no_more_record != 1 DO

    DELETE FROM table_1 WHERE col_id = id;

    IF num > 1000
    THEN
        COMMIT; SET num = 0;
    ELSE
        SET num = num + 1;
    END IF;
    FETCH cur_record INTO t_uuid;
    END WHILE;

    COMMIT;
    CLOSE cur_record;
    # 遊標