[英]MySQL alter table partition by range - Error Code: 1503. A PRIMARY KEY must include all columns in the table's partitioning function
[英]Mysql partitioning every month - Error Code: 1503 A PRIMARY KEY must include all columns in the table's partitioning function
這里也有類似的情況,但對我沒有任何幫助。 我已經創建了表:
CREATE TABLE `message` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`message_content` longtext,
`recipient` varchar(255) DEFAULT NULL,
`send_time` datetime DEFAULT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `send_time` (`send_time`, `id`))
ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_general_ci;
而且我需要添加分區-每月創建一個新分區:
ALTER TABLE messages.message
PARTITION BY RANGE(TO_DAYS(`send_time`))
(PARTITION p01 VALUES LESS THAN (TO_DAYS('2019-01-01')) ENGINE = InnoDB,
PARTITION p02 VALUES LESS THAN (TO_DAYS('2019-02-01')) ENGINE = InnoDB,
PARTITION p03 VALUES LESS THAN (TO_DAYS('2019-03-01')) ENGINE = InnoDB,
PARTITION p04 VALUES LESS THAN (TO_DAYS('2019-04-01')) ENGINE = InnoDB,
PARTITION p05 VALUES LESS THAN (TO_DAYS('2019-05-01')) ENGINE = InnoDB,
PARTITION p06 VALUES LESS THAN (TO_DAYS('2019-06-01')) ENGINE = InnoDB,
PARTITION p07 VALUES LESS THAN (TO_DAYS('2019-07-01')) ENGINE = InnoDB,
PARTITION p08 VALUES LESS THAN (TO_DAYS('2019-08-01')) ENGINE = InnoDB,
PARTITION p09 VALUES LESS THAN (TO_DAYS('2019-09-01')) ENGINE = InnoDB,
PARTITION p10 VALUES LESS THAN (TO_DAYS('2019-10-01')) ENGINE = InnoDB,
PARTITION p11 VALUES LESS THAN (TO_DAYS('2019-11-01')) ENGINE = InnoDB,
PARTITION p12 VALUES LESS THAN (TO_DAYS('2019-12-01')) ENGINE = InnoDB)
我已經嘗試過其他答案的解決方案(例如添加UNIQUE KEY
),但是對我沒有任何幫助。 這是我得到的:
SQL State : HY000
Error Code : 1503
Message : A PRIMARY KEY must include all columns in the table's partitioning function
分區列必須是主鍵的一部分,擁有UNIQUE索引是不夠的。 請參閱mysql docs :
控制這種關系的規則可以表示為:分區表的分區表達式中使用的所有列都必須是該表可能具有的每個唯一鍵的一部分。 [...]這也包括表的主鍵,因為根據定義,它是唯一鍵。
您可能希望將唯一鍵作為主鍵,例如:
PRIMARY KEY (`id`, `send_time`)
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