1、在已經存在表中，修改分割槽表

alter table t_fenqu PARTITION by RANGE (TO_DAYS(create_date))
(
	PARTITION p0 VALUES LESS THAN (TO_DAYS('2018-06-01')),
	PARTITION pmax VALUES LESS THAN MAXVALUE
);

a、異常：A PRIMARY KEY must include all columns in the table's partitioning function （需要將分割槽欄位設定成主鍵）

2、增、刪分割槽

-- 刪除分割槽
alter table t_fenqu DROP PARTITION pmax;

-- 新增分割槽
alter table t_fenqu add PARTITION (
	PARTITION p1 VALUES LESS THAN (TO_DAYS('2018-07-01')),
	PARTITION p2 VALUES LESS THAN (TO_DAYS('2018-08-01')),
	PARTITION p3 VALUES LESS THAN (TO_DAYS('2018-09-01')),
	PARTITION pmax VALUES LESS THAN MAXVALUE
);
 

3、查詢分割槽

SELECT
  partition_name, 
  partition_expression, 
  partition_description, 
  FROM_DAYS(partition_description), 
  table_rows 
FROM
  INFORMATION_SCHEMA.partitions 
WHERE
  TABLE_SCHEMA = SCHEMA() 
  AND TABLE_NAME='t_fenqu'; --這裡是表名

三、儲存過程 自動建立時間分割槽

DROP PROCEDURE IF EXISTS pro_auto_create_partitionByDate;
CREATE PROCEDURE pro_auto_create_partitionByDate(
in dataBaseName varchar(50), in tableName varchar(50)
)x_end:BEGIN
-- 變數宣告 Start
DECLARE x_date VARCHAR(50);
-- DECLARE x_exist_par_max_sql VARCHAR(255);
-- 變數宣告 End


-- 查詢當前時間 加上一個月
select DATE_FORMAT(date_add(NOW(), INTERVAL 1 MONTH),'%Y-%m') into x_date from dual;

-- 拼接新增 分割槽SQL
SET @x_sql = CONCAT('alter table ',tableName,' add PARTITION(', 
'PARTITION ','`p',x_date,'-01`',' VALUES LESS THAN ('
'TO_DAYS(\'',x_date,'-01','\')','))'
);
SELECT @x_sql;  
           PREPARE stmt2 FROM @x_sql;  
           EXECUTE stmt2;  
           DEALLOCATE PREPARE stmt2;
COMMIT;
end x_end;

 

四、建立事件

-- 檢視定時任務是否開啟
show variables like '%event_scheduler'; 
-- 沒有開啟 開啟一下
SET GLOBAL event_scheduler = ON;

-- 建立事件 
DELIMITER $$  
drop event if exists auto_create_partition_time  $$  
create event auto_create_partition_time 
	on schedule 
	every 1 minute  
	starts sysdate()  
do  
BEGIN  
    call pro_auto_create_partitionByDate('mytest','t_fenqu');
END$$  
delimiter ;