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  3. October 2008

RE: Interesting question and debate on ddl tables with datefieldsthatwill not always have a value

The reality is, if you MUST support null capable fields in RPG,
you must ALWAYS check the null indicator before you EVER
access the field in question.

Well, that's true in most languages. It's very common to code:

if (theField == null)
DoThis();
else
DoThat();

or

if (theDateField != null)
theScreenField = FormatTheDate(theDateField);

Did you know that even a null field will still return a valid
value during a fetch?

Eh???? OK, I can see how that would happen, but in my opinion (not that
Rochester asked) that's simply a half-baked implementation, and
basically a bad design.

-Walden


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