DML Returning Values In Forms 6i

Question

Hi there!
I am watching the following behavior in Forms 6i:
Whenever I set DML Returning Value to "Yes" in a data block that corresponds to a table Database (8.0.5) returns to me the updated values, but this doesnot happen with a data block that corresponds to an updatable view. What can I do about that?
George

Answer 1

There are many ways you could do this. One way would be to create a When-Validate-Item trigger on the USER_ID field that checks the database to see if the value already exists and raise an exception if it exists. For example:
/* When-Validate-Item trigger */
DECLARE
     n_dummy     NUMBER := 0;
     CURSOR test_User_ID IS
          SELECT count(*)
            FROM YOUR_TABLE_NAME_HERE
          WHERE USER_ID = :YOUR_BLOCK_NAME.USER_ID;
BEGIN
     OPEN test_User_ID;
     FETCH test_User_ID INTO n_dummy;
     CLOSE test_User_ID;
     IF ( n_dummy > 0 ) THEN
          MESSAGE('User ID " '||:YOUR_BLOCK_NAME.USER_ID||' " already exists.  Please enter a unique User ID.',ACKNOWLEDGE);
          RAISE Form_Trigger_Failure;
     END IF;
END;Please understand that this is just sample code and will need to be modified in order to work in your form. Also note, I'm not positive the "ACKNOWLEDGE" parameter to the MESSAGE built-in is valid for Forms 6i. Please confirm this before using.
Hope this helps.
Craig...
If mine or someone else's response is helpful or correct, please mark it accordingly