How to handle the error message from DB trigger

Hi all

I try to delete a record in A table contains column a1 a2 and column when deleting a record in table A trigger is set to this topic so that it will check if combination of column a1, a2 of table A is present in table B that contains columns a1, a2, but there is no constraint set on these tables. If the combination is that it is to launch an error, I want to treat this error to the user interface. Please suggest me some steps to perform/logic, any information is welcome.

JDeveloper 11.1.2.3.0

Kind regards

Read this: http://www.oracle.com/technetwork/issue-archive/2013/13-mar/o23adf-1897193.html

Dario

Tags: Java

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