mysql自动增加分区表

DELIMITER //

CREATE PROCEDURE add_new_partition()
BEGIN
    DECLARE partition_name VARCHAR(255);
    DECLARE last_partition_date DATE;
    DECLARE new_partition_date DATE;

    -- 获取当前表的最后一个分区名称和日期
    SELECT partition_name, SUBSTR(partition_name, LENGTH(partition_name) - 9, 10) INTO partition_name, last_partition_date
    FROM information_schema.PARTITIONS
    WHERE table_name = 'your_table_name'
    ORDER BY partition_ordinal_position DESC
    LIMIT 1;

    -- 计算新分区的日期（例如，增加一个月）
    SET new_partition_date = DATE_ADD(last_partition_date, INTERVAL 1 MONTH);

    -- 构造新分区的名称
    SET partition_name = CONCAT('p', DATE_FORMAT(new_partition_date, '%Y%m'));

    -- 动态添加新分区
    SET @sql = CONCAT('ALTER TABLE your_table_name ADD PARTITION (PARTITION ', partition_name, ' VALUES LESS THAN (TO_DAYS(\'', new_partition_date, '\')));');
    PREPARE stmt FROM @sql;
    EXECUTE stmt;
    DEALLOCATE PREPARE stmt;
END //

DELIMITER ;

-- 创建事件调度器，每月执行一次添加新分区的存储过程
CREATE EVENT IF NOT EXISTS add_partition_event
ON SCHEDULE EVERY 1 MONTH
DO
    CALL add_new_partition();