MySQL 清空分区表单个分区数据

Posted 2022-12-02 Demonson

1.单个分区清空

ALTER TABLE xxx TRUNCATE PARTITION p20220104；

2.编辑存储过程

功能：指定清空之前某一天的数据，直接调用存储过程实现

DELIMITER $$

USE `managerdb`$$

DROP PROCEDURE IF EXISTS `partition_trunc`$$

CREATE DEFINER=`root`@`localhost` PROCEDURE `partition_trunc`(p_schema_name VARCHAR(64), p_table_name VARCHAR(64), p_trunc_before_date INT)
BEGIN
/*
p_trunc_before_date 清空分区表第N天的数据
*/      
        DECLARE trunc_part_name VARCHAR(16);
		
        SET trunc_part_name = CONCAT('p',DATE_FORMAT(DATE_SUB(CURDATE(),INTERVAL p_trunc_before_date DAY),'%Y%m%d'));
        SET @trunc_partitions = CONCAT("ALTER TABLE ", p_schema_name, ".", p_table_name, " TRUNCATE PARTITION ",trunc_part_name); -- 拼执行语句
		
	SELECT @trunc_partitions; -- 打印删除详情
        
         PREPARE STMT FROM @trunc_partitions;
                
         EXECUTE STMT;
                
         DEALLOCATE PREPARE STMT;
                
        
        
END$$

DELIMITER ;

实例：

call managerdb.partition_trunc('test','t_001',1);

清空test.t_001一天前的单个分区数据