MySQL分区错误

Question

我运行MySQL 5.6，并具有如下表：

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 

我试图通过“RecordingDateTime”使用下面的命令分区表：

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 
); 

我收到以下错误消息：

查询：ALTER TABLE rawdata PARTITION BY RANGE（RecordingDateTime）（PARTITION p0值小于（2013），PARTITION p1的值小于... 错误代码：1659 字段'RecordingDateTime'是这种类型的分区不允许的类型

任何帮助，非常感谢。

Answer 1

更改为

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码被发现here。

Answer 2

我怀疑datetime值和您使用的整数值有问题。一种方法是：

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 
); 

如果不将RecordingDateTime存储为一个时间戳，你也可以尝试：

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 
); 

否则，该值存储为timestamp，并使用时间戳范围。