Displaying an error message coused by check constraint

Question

Hi,
I'm trying to replace oracle error message by my own message.
Form report is throwing an expected error like :
'Error in mru internal routine: ORA-20001: Error in MRU: row= 1, ORA-02290: check constraint ...'
I used the plsql block to handle with that but it doesnt set the my message. After press a button the check constraint validate a date and if data are unexpected then throwing a error which i want to replace by my own.
The process is listed below:
DECLARE
invalid_sql EXCEPTION;
PRAGMA EXCEPTION_INIT (invalid_sql, -02290);
page_error EXCEPTION;
PRAGMA EXCEPTION_INIT (page_error, -20001);
BEGIN
:p12_error := NULL;
EXCEPTION
WHEN invalid_sql THEN
:p12_error := 'In case of sql injection attack some of the statements were forbidden: INSERT, UPDATE, DELETE, DROP, ALTER, TRUNCATE, EXECUTE';
WHEN page_error THEN
:P12_ERROR := 'Please contact your administrator !!!';
WHEN OTHERS THEN
:p12_error := SQLERRM;
END;
P12_ERROR -- hidden item
Then i set the 'success message ' :
&P12_ERROR.
What is wrong that is not showing my message?It not recognoze Init pragma?.
Please give my some points on it!
Edited by: rafix on 2008-12-16 04:31

Answer 1

I followed Denes Kubick' way on his blog http://htmldb.oracle.com/pls/otn/f?p=31517:185:17139524101939:::RP,::
where he created process on SubmitThe process is a simple example of error handling in ApEx. It does inserting and at the
same time it handels exceptions. If an exception occurs, it will use a hidden item on the
page to store error messages. At the same time, the success message of that process
(which is what you get after pressing the "Save" button) is &P185_ERROR. item.
Returning to my previous post i got tabular form report where constraint makes error in case of writing 'insert, delete...' after save button where have been pressed. Pragma mechenism is trapping like you wrote exceptions.Ok.
So what i need configure to associate that process to trapped error?
Edited by: rafix on 2008-12-17 05:40