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The concept is called "overloading". You can have the exact same UDF
name, with different parameters, parameter sizes, even decimal versus
character, etc. Then it could call a different RPG subprocedure based on
that.
CREATE FUNCTION DMIPGMS/GETZIPDIST ( CHAR(5), CHAR(5) )
RETURNS DOUBLE
...
EXTERNAL NAME 'DMIPGMS/SQLGETZIPD';
CREATE FUNCTION DMIPGMS/GETZIPDIST ( CHAR(5), DEC(9 0) )
RETURNS DOUBLE
...
EXTERNAL NAME 'DMIPGMS/SQLGETZCD'; // Notice different?
Rob Berendt
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