ORA-41645: duplicate tag “string” in rule condition

文档解释

ORA-41645: duplicate tag “string” in rule condition

Cause: An attempt was made to specify the same XML tag in more than one positions within a single rule condition.

Action: Remove the duplicate reference to the tag and try again.

ORA-41645 错误表明，在规则条件语句中存在重复标签。

根据Oracle官方文档，ORA-41645 是 Oracle 中应用程序错误。发生该错误时，Oracle 遇到重复标签（”string”），无法解析规则条件。

常见案例

1.在 SELECT 中使用重复标签：SELECT employee_id，LOCATION ‘location1’，LOCATION ‘location2’ FROM EMPLOYEES；

2.执行有效性检查时使用多余标签：VALIDATE CONSTRAINT emp_loc CHECK (location=’location1′ AND location=’location2′

3.在 WITH 条件中存在重复标签：SELECT employee_id FROM EMPLOYEES WHERE EMPLOYEE_ID IN (WITH location1 AS (SELECT EMPLOYEE_ID FROM EMPLOYEES WHERE LOCATION’location1′)，location2 AS (SELECT EMPLOYEE_ID FROM EMPLOYEES WHERE LOCATION’location1′) SELECT EMPLOYEE_ID FROM location1，location2）；

一般处理方法及步骤

1.确认重复使用的标签是否完全一致。

2.更正标签，以避免重复使用。

3.确保编写的查询语句逻辑正确。

4.重新检查语句，确保语法没有问题。

5.重新尝试执行语句。