如何创建Oracle触发器并返回一些数据库错误代码，而不是自定义异常，而是实际的数据库错误？

Question

I would like to know is it possible to return a DB ERROR code from trigger, rather than Custom exception created with RAISE_APPLICATION_ERROR. I have some requirement where i need to return an DB ERROR code like 1 for Unique Constraint. I have a purpose to ask this, because for some reason with some hash based partition we are not creating unique constraints on table and rather have one trigher with which i want to return Unique constraint as an error code after checking if the record exists in DB.

Answer 1

You can use:

RAISE DUP_VAL_ON_INDEX;

Only in this case you can't pass any arguments to this error and you will get:

ORA-00001: unique constraint (.) violated