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ORA-12842: Cursor invalidated during parallel execution ORACLE 报错 故障修复 远程处理

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ORA-12842: Cursor invalidated during parallel execution ORACLE 报错 故障修复 远程处理

文档解释

ORA-12842: Cursor invalidated during parallel execution

Cause: The cursor was invalidated during the parse phase of deferred parallel processing, e.g. when set operands are parallelized.

Action: Depends on why the cursor was invalidated. Possible causes include DDL on a schema object and shared pool being flushed.

ORA-12842错误指示在用并行执行查询时,游标被无效化。

官方解释

ORA-12842在给定查询或存储过程的并行执行时发生,指示未能将游标添加到并行执行控制结构。这通常是由于游标被更新,未被分区或是实例段故障导致的。

常见案例

这是由于另一个会话或实例的问题而导致的,它可能阻止了CURSOR的共享,从而使CURSOR无效。

正常处理方法及步骤

1.首先,要检查可能阻止CURSOR共享的会话,并关闭它们。

2.确保我们的数据库结构不被更新,仅对运行并行查询的会话进行更新。

3.更改归档模式。

4.使用“ alter session force parallel query ” 强制执行并行查询,但必须确保

查询加载足够的数据。

5.使用缓存数据,有助于避免查询分析时间过长。

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ORA-12842: Cursor invalidated during parallel execution ORACLE 报错 故障修复 远程处理

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