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Some bit twiddlers may argue about performance. I'll stay out of that.
One point is the localization of variables.
mynewvar=myfunctionsresult(parm1 : parm2)
with the prototyping setup to protect parm1 and parm2, sure beats
wParm1=parm1;
wParm2=parm2;
call myfunction
and passing all the parms.
Subprocedures support recursion.
subprocedures, moved to a service program, can be converted into a UDF, or
User Defined Function, of SQL. Which is really cool.
select itemnumber, quantity, customer, specialpricing(itemnumber,
quantity, customer) from orderlinetable
Transition:
Let's say OLDPGM calls OLDBOX using all the old fashioned parms and
whatnot. Change OLDBOX to execute the subprocedure from the service
program.
Rob Berendt
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