Will you ever have to use an InfoSource in BI 7?

Question

Hi,
for all the review that I've made so far, one thing that still confuses me is the role of an InfoSource in a BI 7.0 environment.
Will you ever have to use an InfoSource in BI 7? Any situation that calls for that?
Thanks

Answer 1

Hi........
1.In the BI 7 environment you may choose to bring an INFOSOURCE in the data flow.. Right?
Yes.......u r absoulately right......
2.u201CAn InfoSource is only required for complex transformations (multistep procedures) that cannot be performed in a one-step procedure.u201D
--what makes the model you provided u201Ccomplexu201D to bring in the InfoSource?
--So, in your model, what could not be performed in a u201Cone-step procedureu201D that necessitated the Infosource?
Is this what you ae trying to say:
that you used the first set of transformations as u201Ctransfer rulesu201D?
and you needed to use 3 additional transformations as u201Cupdate rulesu201D to the InfoProvider?
and are you saying here that those 3 steps (the 3 "update rules") are what you eliminated by combining them behind the InfoSource?
If that my understanding is right, why couldnu2019t you combine them behind a single new Tranformation but InfoSource, before the new Transformation?
Yes u can think it in that way also.....actually we use infosource in this case........to reduce the redundency of work............I mean suppose u need to write a End routine..........which will delete some fields......and this field exist in all the three datasource..........and every time......for each Transformation u hav to write the code........then its better........that u merge all the three Transformation in one Infosource........then a single transformation from the infosource to the target.......and in that Transformation u write down the sode.....
3. I read that you create a Transformation by right-clicking on the data target, to create the transformation under it. I donu2019t have access to a BI system now but your model suggests that it can be done, by right-clicking on the InfoSource, to create a Transformation under the InfoSource. Right?
i.e. that is how in your model you create 3 transformation under the InfoSource, right?.
Look first u hav to create the infosource............u can create Transformation by right clicking on the Datasource or the Target both.......so for  the first three Transformation..........here the source is the Datasource and the target is the infosource..........so either right click on the Datasource or the infosource >> Create transformation........there as a target select infosource............Now for the second level transformation...............source is the infosource............so again either right click on the infosource or the target and create transformation.......
4. As part of my summary, I am also deducing that even in the BI 7 implementation, there are still two different types of datasources(3.5 and 7.0 datasource) since SAP is still on its way to make all datasources as according to BI7. And that even if you are in a pure BI 7 environment and you decide to use the 3.5 types of data sources, you have no option but to use InfoSource in your model. Right?
Look.......in BI 7.0 also............for 3.5 datasources u can use the old model............but if u use Emulated datasource (if you replicate the old DataSource to a NetWeaver 2004s BI system, we call this DataSource an 'emulated' DataSource. An 'emulated DataSource' is a DataSource that has the same 'look and feel' as the new DataSource, but is actually a BW 3.x DataSource)............if u migrate a datasource.then obviously u hav to use 7.0 flow..........
For an example..........BI 7.0 does'nt support Hierarchy datasource.....u cannot use it as Emulated datasource also.....u hav to use it as BW 3.X datasource only...so in that case u will use 3.X flow only..............
Hope this helps.......
Regards,
Debjani.....