MySQL分區錯誤 - 錯誤代碼：1486

Question

當在表上創建分區時，MySQL拋出錯誤。

錯誤代碼：1486 不允許在（子）分區函數中使用常數，隨機或與時區相關的表達式。

我曾嘗試以下查詢：

alter table test.tbl1 
partition by range(unix_timestamp(sys_time)) 
(
PARTITION p20151001 VALUES LESS THAN (unix_timestamp('2015-10-01')), 
PARTITION p20151101 VALUES LESS THAN (unix_timestamp('2015-11-01')), 
PARTITION p20151201 VALUES LESS THAN (unix_timestamp('2015-12-01')), 
PARTITION p20160101 VALUES LESS THAN (unix_timestamp('2016-01-01')), 
PARTITION p20160201 VALUES LESS THAN (unix_timestamp('2016-02-01')), 
PARTITION p20160301 VALUES LESS THAN (unix_timestamp('2016-03-01')) 
); 

我怎麼能圓了這個問題。 由於提前

Answer 1

這裏讀它可能是你正在使用MySQL 5.1：

https://dev.mysql.com/tech-resources/articles/mysql_55_partitioning.html

Another pain point in MySQL 5.1 is the handling of date columns. You can't use them directly, but you need to convert such columns using either YEAR or TO_DAYS

如果列sys_time是DATETIME，你不需要指定順序的時間戳劃分它，你只需要做TO_DAYS，因爲你不是年份：

alter table test.tbl1 
partition by range (TO_DAYS(sys_time)) 
(
PARTITION p20151001 VALUES LESS THAN (TO_DAYS('2015-10-01')), 
PARTITION p20151101 VALUES LESS THAN (TO_DAYS('2015-11-01')), 
PARTITION p20151201 VALUES LESS THAN (TO_DAYS('2015-12-01')), 
PARTITION p20160101 VALUES LESS THAN (TO_DAYS('2016-01-01')), 
PARTITION p20160201 VALUES LESS THAN (TO_DAYS('2016-02-01')), 
PARTITION p20160301 VALUES LESS THAN (TO_DAYS('2016-03-01')) 
); 

如果SYS_TIME是TIMESTAMP那麼你不需要你的時間戳轉換爲時間戳，我已經採取了一系列的參數：

alter table test.tbl1 
partition by range(sys_time) 
(
PARTITION p20151001 VALUES LESS THAN (unix_timestamp('2015-10-01')), 
PARTITION p20151101 VALUES LESS THAN (unix_timestamp('2015-11-01')), 
PARTITION p20151201 VALUES LESS THAN (unix_timestamp('2015-12-01')), 
PARTITION p20160101 VALUES LESS THAN (unix_timestamp('2016-01-01')), 
PARTITION p20160201 VALUES LESS THAN (unix_timestamp('2016-02-01')), 
PARTITION p20160301 VALUES LESS THAN (unix_timestamp('2016-03-01')) 
);