SQLCODE
The SQLCODE field contains the SQL return code. The code can be zero (0), negative or positive.
0 means successful execution. Negative means unsuccessful with an error. An example is -911 which means a timeout has occurred with a rollback. Positive means successful execution with a warning. An example is +100 which means no rows found.Here is a more comprehensive list of the SQLCODEs for DB2:
Read more about this topic: DB2 SQL Return Codes