The following statement starts a transaction with the following
    characteristics:

    o  Default transaction (no user-specified transaction handle)

    o  READ_WRITE access

    o  CONSISTENCY mode

    o  WAIT option (by default)

    o  Will evaluate the constraint JOB_CODE_REQUIRED when the DML
       statement is executed

    o  Will attempt to reserve the relation JOBS for SHARED_WRITE
       access