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分区表的维护 - ORA-14402 更新分区关键字列
作者:eygle | 【转载请注出处】|【云和恩墨 领先的zData数据库一体机 | zCloud PaaS云管平台 | SQM SQL审核平台 | ZDBM 数据库备份一体机】
链接:https://www.eygle.com/archives/2009/01/ora_14402_partition_tab.html
链接:https://www.eygle.com/archives/2009/01/ora_14402_partition_tab.html
在使用分区表时,需要注意的一个问题是,当我们更新分区字段时,可能会遇到如下错误:
SQL> update DOM_REAL_CATEGORY_FL set doc_level=101 where doc_level=51;
update DOM_REAL_CATEGORY_FL set doc_level=101 where doc_level=51
*
ERROR at line 1:
ORA-14402: updating partition key column would cause a partition change
这个错误的解释是:
ORA-14402: updating partition key column would cause a partition change
Cause: An UPDATE statement attempted to change the value of a partition key column causing migration of the row to another partition
Action: Do not attempt to update a partition key column or make sure that the new partition key is within the range containing the old partition key.
为了解决这个问题,可以使用如下命令更改分区表的属性:
SQL> alter table DOM_REAL_CATEGORY_FL enable row movement;Table altered.
更改分区表的分区键值,意味着要删除记录并重新插入一条新的记录,这会引起记录(Record)的移动,记录的Rowid会改变,相关索引需要进行维护。
SQL> update DOM_REAL_CATEGORY_FL set doc_level=101 where doc_level=51;57024 rows updated.
Elapsed: 00:00:34.61
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By eygle on 2009-01-14 23:50 | Comments (0) | FAQ | 2192 |