Error handling in Teradata Stored Procedure - stored-procedures

Question

I am trying to develop a stored procedure within TERADATA to handle and manage exceptions.
The stored procedure should raise the error to the caller, which is an SSIS Package.
I am trying to illustrate this by creating a stored procedure for illustration only.
I have these tables:
Table_A:
- ID INT
- ITEM_NUM INT
- DESC VARCHAR(20)
- CREATE_DTTM VARCHAR(2O)
Table_B:
- ID INT
- ITEM_NUM INT
- DESC VARCHAR(20)
- CREATE_DTTM VARCHAR(2O)
I have two tables that will be inserting data from two SELECT statements.
REPLACE PROCEDURE csTest2()
SQL SECURITY OWNER
BEGIN
DECLARE varErrorMessage char(256);
DECLARE varSQLState char(5);
DECLARE varReturnCode char(5);
DECLARE varRollbackNeededInd char(1); /* transaction mgt */
SET varRollbackNeededInd = 'N';
SET varReturnCode = '00000';
SET varErrorMessage = '';
BEGIN TRANSACTION;
-- USING A SINGLE HANDLER WITH MULTIPLE STATEMENTS
-- PLANING TO CHANGE ERROR MESSAGE IN EACH STATEMENT.
ins6: BEGIN
DECLARE EXIT HANDLER FOR SQLEXCEPTION
H99:Begin
set varSQLState = SQLSTATE;
set varErrorMessage= 'This message should not be displayed'; --
end H99;
-- IMAGINE THAT I AM GETTING THE VALUES AS INPUT PARAMERS IN THE PROCEDURE
INSERT INTO "Table_A"
(ID , ITEM_NUM, DESC, CREATE_DTTM)
SELECT 1, '222', 'SOME DESC',CURRENT_TIMESTAMP;
H98:Begin
set varSQLState = SQLSTATE;
set varErrorMessage= 'This message is displayed, ITEM_NUM invalid characters';
end H98;
-- NOW I AM DOING A SECOND INSERT TO table b WITH INVALID DATA
-- THE VALUE FOR THE ITEM NUMBER CONTAINS ALPHANUMERICE CHARACTERS
INSERT INTO "Table_b"
(ID , ITEM_NUM, DESC, CREATE_DTTM)
SELECT 1, '333F', 'SOME DESC',CURRENT_TIMESTAMP;
END ins6;
EndTrans: BEGIN
IF varSQLState <> '0' THEN
SET varRollbackNeededInd = 'Y';
SET varReturnCode = '9999';
END IF;
IF varRollbackNeededInd = 'Y' THEN
ROLLBACK; -- ROLLBACK AND SEND ERROR TO CALLER
SIGNAL SQLSTATE 'U0123' SET MESSAGE_TEXT = 'SQlState is - ' || varSQLSTATE || ' - and error is - ' || varErrorMessage;
ELSE
END TRANSACTION; -- COMMIT TRANSACTION
END IF;
END EndTrans;
END;
The problem that I am facing with the above stored procedure is that error message that I get is not the one that I am expecting. Since error is intentionally created in my second statement I am expecting to get: This message is displayed, ITEM_NUM invalid characters but I am getting This message should not be displayed
Now if I modify the PROCEDURE to have multiple handlers, one for each statement, I do get the correct error message, but now since I am intentionally generating the error in the first statement it does not terminate the procedure, it handles the error and sets the proper message but continues to process the next statement which I am not expecting to do this, so how can I terminate this procedure?
REPLACE PROCEDURE csTest2()
SQL SECURITY OWNER
BEGIN
DECLARE varErrorMessage char(256);
DECLARE varSQLState char(5);
DECLARE varReturnCode char(5);
DECLARE varRollbackNeededInd char(1); /* transaction mgt */
SET varRollbackNeededInd = 'N';
SET varReturnCode = '00000';
SET varErrorMessage = '';
BEGIN TRANSACTION;
ins6: BEGIN
DECLARE EXIT HANDLER FOR SQLEXCEPTION
H99:Begin
set varSQLState = SQLSTATE;
set varErrorMessage= 'Error is displayed in this case because ITEM_NUM';
-- ERROR IS PRESENT IN THIS STATEMENT AND SHOULD TERMINATE THE PROCEDURE.
INSERT INTO "Table_A"
(ID , ITEM_NUM, DESC, CREATE_DTTM)
SELECT 1, '222F', 'SOME DESC',CURRENT_TIMESTAMP;
END ins6;
ins7: BEGIN
H98:Begin
set varSQLState = SQLSTATE;
set varErrorMessage= 'no error is displayed in this case';
end H98;
-- NO ERROR IS EXPECTED, BUT IT SHOULD NOT REACH HERE SINCE WE HAD ERROR ON FIRST STATEMENT.
INSERT INTO "Table_b"
(ID , ITEM_NUM, DESC, CREATE_DTTM)
SELECT 1, '333', 'SOME DESC',CURRENT_TIMESTAMP;
END ins7;
EndTrans: BEGIN
IF varSQLState <> '0' THEN
SET varRollbackNeededInd = 'Y';
SET varReturnCode = '9999';
END IF;
IF varRollbackNeededInd = 'Y' THEN
ROLLBACK; -- ROLLBACK AND SEND ERROR TO CALLER
SIGNAL SQLSTATE 'U0123' SET MESSAGE_TEXT = 'SQlState is - ' || varSQLSTATE || ' - and error is - ' || varErrorMessage;
ELSE
END TRANSACTION; -- COMMIT TRANSACTION
END IF;
END EndTrans;
END;