前言
下面仅记录一次对空表的一次分区过程,以日志表为例。
html
CREATE TABLE `sys_log` ( `log_id` int(10) NOT NULL AUTO_INCREMENT COMMENT '主键ID', `user_id` int(10) DEFAULT NULL COMMENT '用户ID', `class_function` varchar(255) DEFAULT NULL COMMENT '类和方法名', `function_id` int(10) DEFAULT NULL COMMENT '功能id', `description` varchar(255) DEFAULT NULL COMMENT '功能名称', `sub_desc` varchar(255) DEFAULT NULL COMMENT '子功能', `ip` varchar(255) DEFAULT NULL, `create_time` datetime DEFAULT NULL COMMENT '建立时间', `type` int(10) DEFAULT NULL COMMENT '类型【1:异常 2:使用方法】', PRIMARY KEY (`log_id`) USING BTREE ) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
建立联合主键
删除原有主键,建立联合主键,这一步你能够在建表的时候就建立好。
sql
ALTER TABLE `sys_log` DROP PRIMARY KEY,ADD PRIMARY KEY (log_id, create_time);
手动建立分区
手动建立分区,这一步你也能够在建表的时候就建立好。
express
ALTER TABLE `sys_log` PARTITION by RANGE COLUMNS (create_time) (PARTITION `p1` VALUES LESS THAN ('2019-01-01'), PARTITION `p2` VALUES LESS THAN (MAXVALUE) ENGINE = InnoDB);
建立存储过程
1.建立用于对单张表分区的存储过程
less
CREATE DEFINER=`root`@`%` PROCEDURE `proc_create_partition`(in_tbname VARCHAR(64)) BEGIN SELECT DATABASE() INTO @dbname; SET @tbname = in_tbname; #查询表的最近一次分区 SELECT REPLACE (partition_name, 'p', '') INTO @PMAX FROM INFORMATION_SCHEMA.PARTITIONS WHERE TABLE_SCHEMA = @dbname AND table_name = @tbname ORDER BY partition_ordinal_position DESC LIMIT 1; #查询表的最近一次分区 SELECT REPLACE(partition_description, "'", '') INTO @DNAME FROM INFORMATION_SCHEMA.PARTITIONS WHERE TABLE_SCHEMA = @dbname AND table_name = @tbname ORDER BY partition_ordinal_position DESC LIMIT 1, 1; SET @t=CONCAT('alter table `',@dbname,'`.',@tbname,' reorganize partition p',@PMAX, ' into(partition p',@PMAX,' values less than (''',date(DATE_ADD(@DNAME,INTERVAL 1 MONTH)),'''),', 'partition p',@PMAX+1,' values less than MAXVALUE)'); SELECT @t; PREPARE stmt FROM @t; EXECUTE stmt; DEALLOCATE PREPARE stmt; COMMIT; END
2.建立存储过程调用单表分区存储过程对全部表进行分区
oop
CREATE DEFINER=`root`@`%` PROCEDURE `proc_create_partition_all`() BEGIN DECLARE tbname varchar(32); DECLARE tmpSql varchar(256); DECLARE done INT DEFAULT FALSE ; #查询已手动分区的表 DECLARE part_cursor CURSOR FOR (SELECT DISTINCT table_name FROM INFORMATION_SCHEMA.PARTITIONS WHERE TABLE_SCHEMA = DATABASE() AND partition_expression IS NOT NULL AND table_name NOT LIKE '%bak'); DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE; #循环对表添加分区 OPEN part_cursor; myLoop: LOOP FETCH part_cursor INTO tbname; IF done THEN LEAVE myLoop; END IF; #调用分区存储过程 CALL proc_create_partition(tbname); COMMIT; END LOOP myLoop; CLOSE part_cursor; END
建立事件
建立事件从2019年8月起每个月1号调用存储过程给表添加分区
.net
CREATE DEFINER=`root`@`%` EVENT `e_create_partition` ON SCHEDULE EVERY 1 MONTH STARTS '2019-08-01 00:00:00' ON COMPLETION PRESERVE DISABLE DO CALL proc_create_partition_all()
参考:
https://blog.csdn.net/zhangkai19910815/article/details/96424294
https://blog.csdn.net/aofavx/article/details/50393281
https://www.cnblogs.com/freeton/p/4265228.html
https://blog.csdn.net/aofavx/article/details/50378360
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版权声明:本文为CSDN博主「洪城一笑」的原创文章,遵循CC 4.0 BY-SA版权协议,转载请附上原文出处连接及本声明。
原文连接:https://blog.csdn.net/zhangkai19910815/article/details/96433467
日志