mysql 增加range分区,MySQL5.5 RANGE分区增加删除处理

最新推荐文章于 2024-11-23 13:42:47 发布

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最新推荐文章于 2024-11-23 13:42:47 发布

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文章标签： mysql 增加range分区

本文介绍MySQL中分区操作的具体步骤，包括如何查看并备份指定日期后的数据记录，如何删除及新增分区，以及解决常见错误提示。

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一、删除分区

##查看要处理的分区的数据量，并导出作为备份

mysql> select count(*) from baby_account_change_log where updated_time >‘2016-12-01 00:00:00‘ and updated_time

+----------+

| count(*) |

+----------+

| 66252 |

+----------+

1 row in set (0.23 sec)

##导出备份

mysql> select * into outfile ‘/tmp/baby_account_change_log_p1.sql‘ from baby_account_change_log where updated_time >‘2016-12-01 00:00:00‘ and updated_time

Query OK, 66252 rows affected (2.71 sec)

##确认要处理分区

mysql> explain partitions select count(*) from baby_account_change_log where updated_time >‘2016-12-01 00:00:00‘ and updated_time

+----+-------------+-------------------------------+------------+-------+---------------+---------+---------+------+-------+--------------------------+

+----+-------------+-------------------------------+------------+-------+---------------+---------+---------+------+-------+--------------------------+

+----+-------------+-------------------------------+------------+-------+---------------+---------+---------+------+-------+--------------------------+

##删除分区

mysql> alter table baby_account_change_log drop partition p0;

Query OK, 0 rows affected (0.01 sec)

二、增加分区

#错误提示删除存储最大值分区

mysql> alter table baby_account_change_log add partition(PARTITION p13 VALUES LESS THAN (unix_timestamp(‘2017-12-31 23:59:59‘)));

ERROR 1481 (HY000): MAXVALUE can only be used in last partition definition

#删除存储最大值分区

mysql> alter table baby_account_change_log drop partition p12;

##增加新的分区

mysql> alter table baby_account_change_log add partition(PARTITION p12 VALUES LESS THAN (unix_timestamp(‘2017-12-31 23:59:59‘)));

原文：http://andylhz2009.blog.51cto.com/728703/1931929