mysql分区表：日期分区

mysql分区表：日期分区

1.创建分区表

CREATE TABLE `api_log` (
  `requestId` varchar(64) NOT NULL COMMENT '调用的唯一标示',
  `systemCode` varchar(64) NOT NULL COMMENT '业务系统编码',
  `tongID` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
  `tong_time`  timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  `pt` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '分区字段',
  PRIMARY KEY (`tongID`,`requestId`,`pt`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='日志信息表'
/*!50100 PARTITION BY RANGE (TO_DAYS(pt))
(PARTITION p20230510 VALUES LESS THAN (739015) ENGINE = InnoDB,
 PARTITION p20230511 VALUES LESS THAN (739016) ENGINE = InnoDB) */;

2.查看分区

-- 01 查询单分区
 SELECT * from api_log partition (p20230510)

-- 02 查看所有分区

SELECT
    PARTITION_NAME,
    TABLE_ROWS 
FROM
    INFORMATION_SCHEMA.PARTITIONS 
WHERE
    TABLE_NAME = 'api_log';

3.添加分区

-- 添加分区
ALTER TABLE hz_api_log_delta add PARTITION (PARTITION p20230512 VALUES LESS THAN (TO_DAYS('2023-05-12')));

4.存储过程：分区删除与创建

delimiter //
CREATE  PROCEDURE `pro_create_del_pt`()
BEGIN
    #Routine body goes here...
## 01.新建后面两天的分区
## 02获取当前时间
SELECT CONCAT('p',DATE_FORMAT(DATE_ADD(NOW(),INTERVAL 2 DAY),'%Y%m%d')) into @pname;
SELECT DATE_ADD(NOW(),INTERVAL 2 DAY) into @pdate;
#删除的分区时间
SELECT  DATE_FORMAT(DATE_ADD(NOW(),INTERVAL -17 DAY) ,'%Y%m%d') into @ddate;
## 03新增分区
-- ALTER TABLE api_log add PARTITION (PARTITION p20230509 VALUES LESS THAN (TO_DAYS(DATE_ADD(NOW(),INTERVAL 1 DAY))));

        set @sql_add_p=concat("ALTER TABLE api_log add PARTITION (PARTITION ",@pname,"  VALUES LESS THAN (TO_DAYS('",@pdate,"')))");
    prepare sql_add_p from @sql_add_p;
    EXECUTE sql_add_p ;
    DEALLOCATE PREPARE sql_add_p;    
## 04 删除分区
#alter table api_log drop partition p20230507;
        set @sql_del_p=concat("ALTER TABLE api_log drop PARTITION p",@ddate);
    prepare sql_del_p from @sql_del_p;
    EXECUTE sql_del_p ;
    DEALLOCATE PREPARE sql_del_p;    
END
 //
delimiter ;

5.事件定时

-- 创建事件
delimiter $$
create event event_pro_create_del_pt
on schedule 
    every 1 DAY 
    STARTS '2023-05-10 20:00:00 '
    comment '每日20:00执行'
DO call pro_create_del_pt();
$$
delimiter ;

-- 查看事件
show events;
或者
select * from mysql.event;

6.触发器设计：子表每插入一行，总表获得一行

-- 创建事件
delimiter $$
CREATE  TRIGGER `trigger_api_log` AFTER INSERT ON `api_log` 
FOR EACH ROW BEGIN
insert into hz_api.api_log_all 
(requestId,systemCode,sjly_part) VALUES
 (NEW.requestId,NEW.systemCode,'区县');
end;
$$
delimiter ;

7.创建索引

--  创建普通索引：在tong_time字段

ALTER TABLE db_base.api_log ADD INDEX index_name ( tong_time );

-- 查看索引
show index from db_base.api_log;

8.添加枚举型字段

ALTER TABLE db_base.api_log add SJLY_PART enum('线上','线下') default null COMMENT '数据来源';