Return code after INSERT or UPDATE in hana sql script

Hi Experts,

How to capture return code after INSERT or UPDATE or UPSERT in hana database.

Below is the code which i am trying.

create procedure "ABC"."EFG"

AS

BEGIN

     declare str varchar(500);

     declare v_stmt varchar(10);

     v_matnr := '123456';

     str := 'insert into "SCHE"."ZTEST_TABLE" values (' ||V_MATNR|| ')';

     v_stmt := EXEC (:STR);

END;

Thanks,

Ebinezar