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Substitution Variable in SQR

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SQR has a special set of variables called Substitution Variables. What are they used for? Can you state the syntax of using them in a SQR program? What advantages do they have?

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  1. JT on Jan 25, 2013 Reply

    Substitution variables are preprocessor or compile time variables. They are more flexible than run time variables because they can replace part of a command not just a literal value.
    Here is an example:

    #define num 1
    #define table EMP
    #define clause1 and EFFDT = ’01-JAN-2013′

    ask empid ‘enter emp id ‘

    update {table}
    set SERIAL = {num}
    where EMP_ID = {empid}
    Here is the SQL statement formed by the compiler

    update EMP
    set SERIAL = 1
    where EMP_ID = ‘123’
    and EFFDT = ’01-JAN-2013′

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