mysql循环插入查询的数据

DELIMITER //
CREATE PROCEDURE batch_insert()
BEGIN
    DECLARE done INT DEFAULT FALSE;
    DECLARE v_id INT;
    DECLARE v_name VARCHAR(255);
    DECLARE cur CURSOR FOR SELECT id, name FROM source_table;
    DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;

    OPEN cur;

    read_loop: LOOP
        FETCH cur INTO v_id, v_name;
        IF done THEN
            LEAVE read_loop;
        END IF;
        INSERT INTO target_table (id, name) VALUES (v_id, v_name);
    END LOOP;

    CLOSE cur;
END //
DELIMITER ;

START TRANSACTION;
SET TRANSACTION ISOLATION LEVEL READ COMMITTED;

DECLARE done INT DEFAULT FALSE;
DECLARE v_id INT;
DECLARE v_name VARCHAR(255);
DECLARE cur CURSOR FOR SELECT id, name FROM source_table;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;

OPEN cur;

read_loop: LOOP
    FETCH cur INTO v_id, v_name;
    IF done THEN
        LEAVE read_loop;
    END IF;
    INSERT INTO target_table (id, name) VALUES (v_id, v_name);
END LOOP;

CLOSE cur;
COMMIT;

INSERT IGNORE INTO target_table (id, name)
SELECT id, name FROM source_table;