mysql 定时添加删除历史分区

1. 新建表 CREATE TABLE `perf_biz_vm_new` (            `CREATE_TIME` datetime NOT NULL COMMENT '性能采集时间',            `VM_ID` varchar(80) NOT NULL COMMENT '虚拟机ID',             `PROCESSOR_USED` varchar(100) DEFAULT NULL COMMENT 'CPU利用率(%)',             `MEM_USED` varchar(100) DEFAULT NULL COMMENT '内存的使用率(%)',             `MEM_UTILITY` varchar(100) DEFAULT NULL COMMENT '可用内存量(bytes)',             `BYTES_IN` varchar(100) DEFAULT NULL COMMENT '流入流量速率(Mbps)',             `BYTES_OUT` varchar(100) DEFAULT NULL COMMENT '流出流量速率(Mbps)',             `PROC_RUN` varchar(100) DEFAULT NULL COMMENT 'CPU运行队列中进程个数',             `WRITE_IO` varchar(100) DEFAULT NULL COMMENT '虚拟磁盘写入速率(Mb/s)',             `READ_IO` varchar(100) DEFAULT NULL COMMENT '虚拟磁盘读取速率(Mb/s)',             `PID` varchar(36) NOT NULL,              PRIMARY KEY (`PID`,`CREATE_TIME`),              KEY `mytable_categoryid` (`CREATE_TIME`) USING BTREE,              KEY `perf_biz_vm_vm_id_create_time` (`VM_ID`,`CREATE_TIME`)  ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='虚拟机性能采集表'  /*!50500 PARTITION BY RANGE  COLUMNS(CREATE_TIME) (PARTITION p20180225 VALUES LESS THAN ('20180226') ENGINE = InnoDB,  PARTITION p20180226 VALUES LESS THAN ('20180227') ENGINE = InnoDB,  PARTITION p20180227 VALUES LESS THAN ('20180228') ENGINE = InnoDB,  PARTITION p20180228 VALUES LESS THAN ('20180229') ENGINE = InnoDB,  PARTITION p20180229 VALUES LESS THAN ('20180230') ENGINE = InnoDB) */     2. 更换表名    rename table perf_biz_vm to perf_biz_vm_old; rename table perf_biz_vm_new to perf_biz_vm;     3. 把最近2天的数据插入到新表里面.   #!/bin/bash function insert(){ end_time="$1 $2" start_time="$3 $4" mysql -u'user' -p'passwd' << ! use monitor_alarm_openstack; set innodb_flush_log_at_trx_commit=0; start transaction; insert into perf_biz_vm select * from perf_biz_vm_old where create_time < '$end_time' and create_time > '$start_time'; commit; select TABLE_ROWS from information_schema.tables where TABLE_SCHEMA ="monitor_alarm" and TABLE_NAME="perf_biz_vm"; ! } base_time="2018-02-27 2:00:00" while true do         #end_time=$(date -d "-1hour $base_time" +%Y-%m-%d" "%H:%M:%S)         end_time=$base_time         start_time=$(date -d "-1hour $end_time" +%Y-%m-%d" "%H:%M:%S)         #base_time=$end_time         base_time=$start_time         echo "Cur_time: $(date +%Y%m%d" "%H%M%S)" | tee -a 1.log         echo "Range: $end_time $start_time" | tee -a 1.log         insert ${end_time} ${start_time} | tee -a 1.log         sleep 2 done 4.编写存储过程用于定期创建新的分区，并删除几天前旧的分区 代码如下： delimiter $$ CREATE  PROCEDURE clean_partiton(SCHEMANAME VARCHAR(64), TABLENAME VARCHAR(64)，reserve INT) BEGIN       -- 注：该储存过程适用于分区字段类型为datetime，按天分区且命名为p20180301格式规范的分区表 --     获取最旧一个分区，判断是否为reserve天前分区，是则进行删除，每次只删除一个分区 --     提前创建14天分区，判断命名不重复则创建 --     创建 history_partition 表，varchar(200)和datetime类型。记录执行成功的SQL语句         DECLARE PARTITION_NAMES VARCHAR(16);             DECLARE OLD_PARTITION_NAMES VARCHAR(16);          DECLARE LESS_THAN_TIMES varchar(16);              DECLARE CUR_TIME INT;                           DECLARE RETROWS INT;         DECLARE DROP_PARTITION VARCHAR(16); SET CUR_TIME = DATE_FORMAT(NOW(),'%Y%m%d');         BEGIN         SELECT PARTITION_NAME INTO DROP_PARTITION FROM information_schema.partitions WHERE table_schema = SCHEMANAME AND table_name = TABLENAME order by PARTITION_ORDINAL_POSITION  asc limit 1 ;         IF SUBSTRING(DROP_PARTITION,2) < DATE_FORMAT(CUR_TIME - INTERVAL reserve DAY, '%Y%m%d') THEN SET @sql = CONCAT( 'ALTER TABLE ', SCHEMANAME, '.', TABLENAME, ' drop PARTITION ', DROP_PARTITION, ';' );         PREPARE STMT FROM @sql;         EXECUTE STMT;         DEALLOCATE PREPARE STMT;         INSERT INTO history_partition VALUES (@sql, now()); END IF;         end;                  SET @__interval = 1;         create_loop: LOOP                 IF @__interval > 15 THEN                         LEAVE create_loop;                 END IF;                 SET LESS_THAN_TIMES = DATE_FORMAT(CUR_TIME + INTERVAL @__interval DAY, '%Y%m%d');                 SET PARTITION_NAMES = DATE_FORMAT(CUR_TIME + INTERVAL @__interval -1 DAY, 'p%Y%m%d');                 IF(PARTITION_NAMES != OLD_PARTITION_NAMES) THEN                      SELECT COUNT(1) INTO RETROWS FROM information_schema.partitions WHERE table_schema = SCHEMANAME AND table_name = TABLENAME AND LESS_THAN_TIMES <= substring(partition_description,2,8) ;                      IF  RETROWS = 0 THEN                      SET @sql = CONCAT( 'ALTER TABLE ', SCHEMANAME, '.', TABLENAME, ' ADD PARTITION (PARTITION ', PARTITION_NAMES, ' VALUES LESS THAN ( "',LESS_THAN_TIMES, '" ));' );                      PREPARE STMT FROM @sql;                      EXECUTE STMT;                      DEALLOCATE PREPARE STMT; INSERT INTO history_partition VALUES (@sql, now());                      END IF;                                       END IF;                 SET @__interval=@__interval+1;                 SET OLD_PARTITION_NAMES = PARTITION_NAMES;         END LOOP; END $$ delimiter ; Step 5：创建名称为clean_perf_biz_vm的事件，并在每天凌晨00:30:00的时候调用clean_partition存储过程创建下一个新分区，并删除两天前的旧分区。 delimiter | CREATE DEFINER=’root’@’localhost’ event clean_perf_biz_vm on schedule every 1 day starts DATE_ADD(DATE_ADD(CURDATE(),INTERVAL 1 DAY),INTERVAL 30 MINUTE) ON COMPLETION PRESERVE do begin call clean_partition(‘monitor_alarm’,’perf_biz_vm’,’2’); end | delimiter；