mysql - 主必须包括表的分区位置错误中的所有列？

Question

我尝试创建一个具有范围分区的表。但它显示以下错误:

A primary must include all columns in the table's partitioning location.

这是我的 SQL 语句:

CREATE TABLE `tbl_emp_confirmation` (
  `fld_id` int(11) NOT NULL AUTO_INCREMENT,
  `fldemp_id` varchar(100) DEFAULT NULL,
  `fldempname` varchar(100) DEFAULT NULL,
  `fldjoindate` varchar(100) DEFAULT NULL,
  `fldconfirmdate` Date NOT NULL,
  `fldresigndate` varchar(100) DEFAULT NULL,
  `fldstatus` varchar(50) DEFAULT NULL,
  `fldcon_status` varchar(100) DEFAULT NULL,
  UNIQUE KEY `fld_id` (`fld_id`),
  KEY `in_empconfirmation` (`fldemp_id`,`fldempname`,`fldjoindate`,`fldconfirmdate`)
  ) PARTITION BY RANGE ( Month(fldconfirmdate))
  (PARTITION p_JAN VALUES LESS THAN (TO_DAYS('2011-01-01')),
 PARTITION p_FEB VALUES LESS THAN (TO_DAYS('2011-02-01')),
 PARTITION p_MAR VALUES LESS THAN (TO_DAYS('2011-03-01')),
 PARTITION p_APR VALUES LESS THAN (TO_DAYS('2011-04-01')),
 PARTITION p_MAY VALUES LESS THAN (TO_DAYS('2011-05-01')),
 PARTITION p_MAX VALUES LESS THAN MAXVALUE );

Answer 1

您正在使用 fldconfirmdate 对数据进行分区，它是您的 PK 的一部分，但不是您的 UNIQUE KEY fld_id 的一部分。

这是从 MySQL manual 中提取的:

In other words, every unique key on the table must use every column in the table's partitioning expression.

这意味着，将 fldconfirmdate 设置为 UNIQUE KEY 'fld_id' 的一部分将解决问题。

CREATE TABLE `tbl_emp_confirmation` (
  `fld_id` int(11) NOT NULL AUTO_INCREMENT,
  `fldemp_id` varchar(100) DEFAULT NULL,
  `fldempname` varchar(100) DEFAULT NULL,
  `fldjoindate` varchar(100) DEFAULT NULL,
  `fldconfirmdate` Date NOT NULL,
  `fldresigndate` varchar(100) DEFAULT NULL,
  `fldstatus` varchar(50) DEFAULT NULL,
  `fldcon_status` varchar(100) DEFAULT NULL,
  UNIQUE KEY `fld_id` (`fld_id`, `fldconfirmdate`),
  KEY `in_empconfirmation` (`fldemp_id`,`fldempname`,`fldjoindate`,`fldconfirmdate`)
  ) PARTITION BY RANGE ( Month(fldconfirmdate))
  (PARTITION p_JAN VALUES LESS THAN (TO_DAYS('2011-01-01')),
 PARTITION p_FEB VALUES LESS THAN (TO_DAYS('2011-02-01')),
 PARTITION p_MAR VALUES LESS THAN (TO_DAYS('2011-03-01')),
 PARTITION p_APR VALUES LESS THAN (TO_DAYS('2011-04-01')),
 PARTITION p_MAY VALUES LESS THAN (TO_DAYS('2011-05-01')),
 PARTITION p_MAX VALUES LESS THAN MAXVALUE );