MySQL分區錯誤

Question

我運行MySQL 5.6，並具有如下表：

CREATE TABLE `rawdata` (
    `RawDataSeq` int(10) unsigned NOT NULL AUTO_INCREMENT, 
    `SpeciesSeq` int(10) unsigned DEFAULT NULL, 
    `DataSourceSeq` int(10) unsigned DEFAULT NULL, 
    `MeasurementSeq` int(10) unsigned DEFAULT NULL, 
    `RecordingDateTime` datetime DEFAULT NULL, 
    `RawSensorData` varchar(100) DEFAULT NULL, 
    `RawDataNumeric` decimal(36,18) DEFAULT NULL, 
    `RawDataString` varchar(100) DEFAULT NULL, 
    `RawDataDate` datetime DEFAULT NULL, 
    `RawDataTime` varchar(45) DEFAULT NULL, 
    `RawDataDateTime` datetime DEFAULT NULL, 
    `ActiveRecord` int(10) unsigned DEFAULT NULL, 
    `LastUpdateDate` datetime DEFAULT NULL, 
    `UserId` varchar(6) DEFAULT NULL, 
    `BadData` varchar(200) DEFAULT NULL, 
    PRIMARY KEY (`RawDataSeq`) 
) ENGINE=MyISAM AUTO_INCREMENT=5676258 DEFAULT CHARSET=latin1 

我試圖通過「RecordingDateTime」使用下面的命令分區表：

ALTER TABLE rawdata PARTITION BY RANGE (RecordingDateTime) (
    PARTITION p0 VALUES LESS THAN (2013), 
    PARTITION p1 VALUES LESS THAN (2014), 
    PARTITION p2 VALUES LESS THAN (2015), 
    PARTITION p3 VALUES LESS THAN (UNIX_TIMESTAMP('2015-06-01 00:00:00')), 
    PARTITION p4 VALUES LESS THAN MAXVALUE 
); 

我收到以下錯誤消息：

查詢：ALTER TABLE rawdata PARTITION BY RANGE（RecordingDateTime）（PARTITION p0值小於（2013），PARTITION p1的值小於... 錯誤代碼：1659 字段'RecordingDateTime'是這種類型的分區不允許的類型

任何幫助，非常感謝。

Answer 1

更改爲

PRIMARY KEY (`RawDataSeq`, RecordingDateTime) 

ALTER TABLE rawdata PARTITION BY RANGE (TO_DAYS(RecordingDateTime)) (
    PARTITION p_old VALUES LESS THAN (TO_DAYS('2013-01-01')), 
    PARTITION p2013 VALUES LESS THAN (TO_DAYS('2014-01-01')), 
    PARTITION p2014 VALUES LESS THAN (TO_DAYS('2015-01-01')), 
    PARTITION p2015 VALUES LESS THAN (TO_DAYS('2016-01-01')), 
    PARTITION future VALUES LESS THAN MAXVALUE 
); 

你需要每年十二月的代碼被發現here。

Answer 2

我懷疑datetime值和您使用的整數值有問題。一種方法是：

ALTER TABLE rawdata PARTITION BY RANGE (year(RecordingDateTime)) (
    PARTITION p0 VALUES LESS THAN (2013), 
    PARTITION p1 VALUES LESS THAN (2014), 
    PARTITION p2 VALUES LESS THAN (2015), 
    PARTITION p3 VALUES LESS THAN MAXVALUE 
); 

如果不將RecordingDateTime存儲爲一個時間戳，你也可以嘗試：

ALTER TABLE rawdata PARTITION BY RANGE (year(RecordingDateTime)*100 + month(RecordDateTime) (
    PARTITION p0 VALUES LESS THAN (201300), 
    PARTITION p1 VALUES LESS THAN (201400), 
    PARTITION p2 VALUES LESS THAN (201500), 
    PARTITION p3 VALUES LESS THAN (201506), 
    PARTITION p4 VALUES LESS THAN MAXVALUE 
); 

否則，該值存儲爲timestamp，並使用時間戳範圍。