Understanding the code refactoring tools

For backward compatibility, Genero BDL is a permissive language. For example, keywords and symbols are not case-sensitive by default. However, if programmers don't follow a strict coding convention, permissive languages typically make the source difficult to read and maintain:

-- Bad programming, but it compiles...
MAIN
    DEFINE CustId INTEGER
    LET custId = 998
    select custname from Customer WHERE customer_num = custid
    LET CUSTID = 999
    SELECT custname FROM CUSTOMER WHERE customer_num = CUSTID
END MAIN