ORA-02014: cannot select FOR UPDATE from view with DISTINCT, GROUP BY, etc. ORACLE 报错 故障修复 远程处理
文档解释
ORA-02014: cannot select FOR UPDATE from view with DISTINCT, GROUP BY, etc.
Cause: An attempt was made to select FOR UPDATE from a view which had not been merged because the view used syntax (for example, DISTINCT or GROUP BY) preventing the merge, or because of initialization file parameter settings.
Action: Determine the reason the view will not merge and, if possible, make changes so that it can.
该错误通常指Oracle数据库在尝试从特殊类型视图执行任何锁定语句(FOR UPDATE…)时抛出的异常,此视图对数据进行了GROUP BY、DISTINCT或UNION处理,再次使用View的FOR UPDATE会抛出ORA-02014的这个异常。
官方解释
ORA-02014: cannot select FOR UPDATE from view with DISTINCT,GROUP BY,etc.
当尝试从具有DISTINCT、GROUP BY、UNION或INTERSECT的视图执行任何形式的FOR UPDATE时,将返回ORA-02014。
常见案例
当尝试从以下查询返回的视图中多表更新时,将返回ORA-02014:
select distinct col1, col2 from table1 where col3 = var1;
正常处理方法和步骤:
1. 首先,需要确保执行的查询是正确的。
2. 然后,可以考虑替换查询中的UNION、GROUP BY或DISTINCT子句以使用JOIN,以避免ORA-02014错误的发生。
3. 也可以尝试在查询的SELECT子句中进行更改,以允许对类似视图的功能Table的更新
4. 最后,应该停用VIEW并尝试避免更新或检查对视图功能表的影响。