Question:
What do you think about this issue, when to use a generic data source and when to use one from the business content?
What I don't know yet is how modified ones (e.g. enhanced extract structures, function enhancements) will be treated when doing a system upgrade (as we haven't done one since we are using BW).
In special I have to have a data source providing information from MCVBAK, MCVBAP, MCLIKP and MCLIPS. As this isn't possible with an unmodified data source (2LIS*) I'm thinking about creating an infoset with a generic data source based on it? Or is it a better way to use 2LIS_11_VAITM and 2LIS_12_VCITM modified and combine them in SAP BW? (ODS object based on the two infosources?)
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Juergen Limbach
Answer:
Whenever possible try using the BCT... the delta mechanism is (or at least should be) better and if it doesn't work, you can always blame SAP for it. If you don't have the need for delta loads... it might be easier to create your own extractor.
cheers,
El Belgio
Answer:
You're right, almost forgot the delta mechanism, but how are modified data sources affected by upgrades (that's what's the most interesting part...)
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Juergen Limbach
Answer:
If the structure of the tables is changed, then the extractor will also be changed by SAP to take care about that ;
if you use generic extraction, you will have to think about on your own ;
so that's another point in favour of extending BC.
But in fact the structure seldom change, and you know that SAP is not always doing what he is supposed to do on time, so this point is not So important.
To choose between the two options (in the current situtation), I would rather try to balance the effort needed to develop the new extractor against the effort needed to enhance BC.
The delta problem was an actual BAD point for generic extractor, but now that we have the generic delta, it's becoming less critical.
Ch
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There are only 10 types of people in the world :
those who understand binary and those who don't.
Answer:
Hmmm, so I should go on as I have done until now, modifying the BC data sources and creating (as in order to extract Z* tables) generic data sources.
Thank you, Belgian guys.
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Juergen Limbach