Range分区表建表语句如下，其中分区键必须和id构成主键和唯一键
CREATE TABLE `test1` ( `id` char(32) COLLATE utf8mb4_unicode_ci NOT NULL COMMENT ‘自增主键(guid)‘, `create_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT ‘创建时间‘, `partition_key` int(8) NOT NULL COMMENT ‘分区键(格式:yyyyMMdd)‘, PRIMARY KEY (`id`,`partition_key`), UNIQUE KEY `id_UNIQUE` (`id`,`partition_key`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci PARTITION BY RANGE (partition_key) (PARTITION p0 VALUES LESS THAN (20180619) ENGINE = InnoDB, PARTITION p20180619 VALUES LESS THAN (20180620) ENGINE = InnoDB, PARTITION p20180621 VALUES LESS THAN (20180622) ENGINE = InnoDB, PARTITION p20180622 VALUES LESS THAN (20180623) ENGINE = InnoDB, PARTITION p20180623 VALUES LESS THAN (20180624) ENGINE = InnoDB);
新增分区
alter TABLE `test1` add PARTITION( PARTITION p20180629 VALUES LESS THAN (20180630) ENGINE = InnoDB );
删除分区
alter table `test1` drop PARTITION p20180629;
Mysql不能自动创建分区，需要使用mysql event事件的方式自动创建分区
1.创建分区的存储过程如下（每次执行先校验当前分区是否存在，如果存在则不处理；不存在则创建）：
DELIMITER $$ #该表所在数据库名称 USE `demo`$$ DROP PROCEDURE IF EXISTS `create_partition_by_day`$$ CREATE PROCEDURE `create_partition_by_day`(IN_SCHEMANAME VARCHAR(64), IN_TABLENAME VARCHAR(64)) BEGIN #当前日期存在的分区的个数 DECLARE ROWS_CNT INT UNSIGNED; #目前日期，为当前日期的后一天 DECLARE TARGET_DATE TIMESTAMP; #分区的名称，格式为p20180620 DECLARE PARTITIONNAME VARCHAR(9); #当前分区名称的分区值上限，即为 PARTITIONNAME + 1 DECLARE PARTITION_ADD_DAY VARCHAR(9); SET TARGET_DATE = NOW() + INTERVAL 1 DAY; SET PARTITIONNAME = DATE_FORMAT( TARGET_DATE, ‘p%Y%m%d‘ ); SET TARGET_DATE = TARGET_DATE + INTERVAL 1 DAY; SET PARTITION_ADD_DAY = DATE_FORMAT( TARGET_DATE, ‘%Y%m%d‘ ); SELECT COUNT(*) INTO ROWS_CNT FROM information_schema.partitions WHERE table_schema = IN_SCHEMANAME AND table_name = IN_TABLENAME AND partition_name = PARTITIONNAME; IF ROWS_CNT = 0 THEN SET @SQL = CONCAT( ‘ALTER TABLE `‘, IN_SCHEMANAME, ‘`.`‘, IN_TABLENAME, ‘`‘, ‘ ADD PARTITION (PARTITION ‘, PARTITIONNAME, " VALUES LESS THAN (", PARTITION_ADD_DAY ,") ENGINE = InnoDB);" ); PREPARE STMT FROM @SQL; EXECUTE STMT; DEALLOCATE PREPARE STMT; ELSE SELECT CONCAT("partition `", PARTITIONNAME, "` for table `",IN_SCHEMANAME, ".", IN_TABLENAME, "` already exists") AS result; END IF; END$$ DELIMITER ; 2.数据库定时任务(每小时执行一次)
DELIMITER $$ #该表所在的数据库名称 USE `demo`$$ CREATE EVENT IF NOT EXISTS `daily_generate_partition` ON SCHEDULE EVERY 1 hour #执行周期，还有天、月等等 STARTS ‘2018-06-20 00:00:00‘ ON COMPLETION PRESERVE ENABLE COMMENT ‘Creating partitions‘ DO BEGIN #调用刚才创建的存储过程，第一个参数是数据库名称，第二个参数是表名称 CALL datacollectcenter.create_partition_by_day(‘demo‘,‘test1‘); END$$ DELIMITER ;
原文：https://www.cnblogs.com/qizhelongdeyang/p/9240507.html