mysql 遍历结果集get

-- 示例：使用分页查询
SET @page_size = 100;
SET @page_number = 0;
REPEAT
    SELECT * FROM your_table
    LIMIT @page_size OFFSET @page_number * @page_size;
    SET @page_number = @page_number + 1;
UNTIL ROW_COUNT() = 0 END REPEAT;

-- 示例：使用游标遍历并确保正确关闭
DELIMITER //

CREATE PROCEDURE process_data()
BEGIN
    DECLARE done INT DEFAULT FALSE;
    DECLARE v_id INT;
    DECLARE v_name VARCHAR(255);
    DECLARE cur CURSOR FOR SELECT id, name FROM your_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;
        -- 处理数据
        SELECT v_id, v_name;
    END LOOP;

    CLOSE cur;
END //

DELIMITER ;