ORA-25242: cannot change subscriber name from string to string without FIRST_MESSAGE option

文档解释

ORA-25242: cannot change subscriber name from string to string without FIRST_MESSAGE option

Cause: An attempt was made to change the subscriber name while using the NEXT_MESSAGE or NEXT_TRANSACTION option for dequeuing.

Action: To use a subscriber name that is different from the previous dequeue call, reset the dequeuing position by using the FIRST_MESSAGE navigation option.

ORA-25242错误是Oracle数据库中常见的一个错误，它表示发布/订阅事务处理系统中订阅者不能更改订阅者名称而没有 FIRST_MESSAGE 选项。

Oracle官方文档中对于ORA-25242的描述为：

ORA-25242:无法在没有FIRST_MESSAGE选项的情况下从string to string更改订阅者名称

这个错误是指，当我们更改订阅者名称时，必须要设置 FIRST_MESSAGE 选项，如果不设置，则会抛出ORA-25242的异常。

常见案例

一般处理方法及步骤

”alter subscriber subscribery change name subscriberB first_message latest_received”;

上述sql语句改变订阅者subscriberA的名称为subscriberB，同时指定第一条消息为系统当前最新收到的消息。