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  1.  Home
  2. RPG400-L
  3. January 2010

RE: Passing a Null Date to a Procedure

I argued for the 0001-01-01 date for null capable dates or when we need a
date to be "null", it was a combination of management and the programmatic
staff that made the decision as a group and as you can see, I lost :)





From: David FOXWELL <David.FOXWELL@xxxxxxxxx>
To: RPG programming on the IBM i / System i <rpg400-l@xxxxxxxxxxxx>
Date: 01/04/2010 02:57 AM
Subject: RE: Passing a Null Date to a Procedure
Sent by: rpg400-l-bounces@xxxxxxxxxxxx



Happy new year all,

We pass a lot of dates to procedures and always need to know if the value
is null.

Actually, we have no null capable date fields in our db. We record the
value 0001-01-01 to represent a null date. All our programs have the
constant gNULL_DATE from a copybook and the parameter would be compared
with that.

I always wondered why we never used real null values and didn't realise
that this would be an issue or that RPG did not have full null support.


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