topic Re: function module / name spaces in Application Development and Automation Discussions

function module / name spaces

Former Member — Mon, 15 Nov 2010 15:23:00 GMT

Hello all,

I was asked to create a function module with the prefix "ZIST_" in its name. Unfortunately this name is part of the SAP namespace, as the system tells me during FM creation (it would be ok to use "Z_IST_" though). Technically it is possible to ignore the error/warning message and create the "ZIST_" function anyway.

My question now is: can this issue have any bad impact, for example during a release upgrade? If not, if it's ok to use "ZIST_" as prefix, why does the SAP system then popup this warning at all?

Thanks in adavance for your help!

Kind regards, Matthias

Re: function module / name spaces

ThomasZloch — Mon, 15 Nov 2010 15:33:35 GMT

Well, for function modules SAP sets Y_ and Z_ as customer name space, so why not stick with that. If you check in the repository browser, there are few older SAP function modules starting with Z*. Although I doubt SAP would add any new ones starting with Y or Z, you are on the safe side if you strictly follow the customer name range suggestions.

Thomas

Re: function module / name spaces

Former Member — Tue, 16 Nov 2010 08:27:21 GMT

Yes, I know, and usually I do stick with the namespace restrictions. But this is a special case now, collegues have alredy created function modules with "ZIST_" as prefix. So the question is: can that have any negative consequences?

Kind regards, Matthias

Re: function module / name spaces

ThomasZloch — Tue, 16 Nov 2010 08:38:49 GMT

Theoretically, SAP could introduce function modules starting with ZIST_ in the future.

I'd say the probability is only slightly larger than zero though, and even smaller for an entire duplicate function name collision by any chance. Your server might rather get struck by lightning. And even if it happens, then you are forced to change your names, should not be the end of the world.

But it remains your risk

Thomas

Re: function module / name spaces

Former Member — Tue, 16 Nov 2010 08:42:26 GMT

thanks, that makes sense!