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ORA-30553: The function is not deterministic ORACLE 报错 故障修复 远程处理

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ORA-30553: The function is not deterministic ORACLE 报错 故障修复 远程处理

文档解释

ORA-30553: The function is not deterministic

Cause: The function on which the index is defined is not deterministic

Action: If the function is deterministic, mark it DETERMINISTIC. If it is not deterministic (it depends on package state, database state, current time, or anything other than the function inputs) then do not create the index. The values returned by a deterministic function should not change even when the function is rewritten or recompiled.

ORA-30553:函数不具有确定性

错误说明

ORA-30553: The function is not deterministic的错误是由ORACLE数据库引擎引发的,ORA-30553 错误信息表明,用户定义的函数不具备确定性,意味着该函数的输出值可能随入参数的不同而改变。

常见案例

ORA-30553错误通常表明用户定义的函数不具备确定性,常见的案例是对sys_context或NLS_LANGUAGE等函数的调用,其值会根据session环境值进行重新计算,这意味着ORA-30553错误可能出现在用户尝试计算含有非确定函数的表达式时,比如用户尝试全局性字段索引(GFIX)或创建

一个数据库时。

解决方法

1. 首先需要明确是否确实需要调用导致ORA-30553错误的函数,如果不需要,只需移除其调用即可;

2. 如果确实需要调用,只能确保调用的不变性,比如将NLS_LANGUAGE函数的值替换为变量;

3. 具体的编码过程可查看ORACLE数据库引擎手册,在函数说明中可以发现是否函数是否具有确定性;

4. 也可以使用ORACLE自带的检查工具,自动查找潜在问题,并自动修复以避免出现错误。

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ORA-30553: The function is not deterministic ORACLE 报错 故障修复 远程处理

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