Can not catch error in merge statement - vb.net

Question

Hi I have problem to catch the error in merge statement.
The merge statement will get the following error when run in SQL Plus:
ORA-00932: inconsistent datatypes: expected DATE got NUMBER
When I execute the statement with ExecuteNonQuery in Vb.net will not get any exception.
Is there any way to catch that error in Vb.net without using log errors in merge statement?
EDIT:
Try
Dim count as Interger=0
Dim cmd As New OleDb.OleDbCommand(strSQL)
count = cmd .ExecuteNonQuery()
Catch ex as Exception
... Respond ...
End Try
Sample Merge Statement with error:
MERGE INTO TABLE_A a USING
(
SELECT ID,SUM(AMOUNT) AMOUNT
FROM TABLE_B b
GROUP BY ID
) b
ON ( b.ID=a.ID )
WHEN MATCHED THEN
UPDATE SET a.AMOUNT=a.AMOUNT+b.AMOUNT
WHEN NOT MATCHED THEN
INSERT (ID, DT, AMOUNT) VALUES (b.ID, 0, b.AMOUNT);
The SQL Plus will get error at the insert but Vb.net can not catch.
The data type for field DT is DATE.

Answer 1

EDIT 3:
My bad - in that case, I think you'll have to subscribe to oleDbConnection.InfoMessage event and check for applicable SQL-00932 messages after the MERGE command. I don't see any equivalent property to FireInfoMessageEventOnUserErrors in OLE-DB (which, again, seems totally backwards...).
EDIT 2:
It appears there's a default threshold that will cause vb.net to ignore certain SQL exceptions (can't fathom the rationale behind such a decision). Regardless, I think if you do the following, you should see the exception raised.
cmd.FireInfoMessageEventOnUserErrors = true;
End EDIT2
EDIT: I just read the problem a bit closer. If the vb.net execution is not throwing any exception at all, that would indicate that you're not running the exact same statement in both. My initial guess is that you're passing a date parameter that is passing SQL Plus string variable incorrectly as 01/01/2015 (which is 1 divided by 1 divided by 2015) and vb.net variable correctly as '01/01/2015' (that is, as a string with quotation marks).
End EDIT
I have no idea what you mean by "using log errors in merge statement", but it sounds like you just need the syntax for using the vb.net try-catch syntax to catch and act on Oracle errors.
From here: http://www.tek-tips.com/viewthread.cfm?qid=467119
Pertinent code snippet:
Try
... Sql here ...
Catch ex as OleDbException
... Respond to error here ...
End Try