Can you please help me regarding Generic data Source

Question

Hello Friends,
I have done generic delta source , In that i found
1) Timestamp
2) 0calday
3) Numeric Pointer
Can you please explain me
And also
Update modes :
Additive Delta
New Status for Changed records
Thanks
PP

Answer 1

Hi,
If u want ur data source is delta enabled u vl come up vt these terms.
There are various delta processes for SAP source systems:
       1.      Forming deltas with after, before and reverse images that are updated directly in the delta queue; an after image shows the status after the change, a before image the status before the change with a negative sign and the reverse image also shows the negative sign next to the record while indicating it for deletion. This serializes the delta packets. The delta process controls whether adding or overwriting is permitted. In this case, adding and overwriting are permitted. This process supports an update in an ODS object as well as in an InfoCube. (technical name of the delta process in the system): ABR)
       2.      The extractor delivers additive deltas that are serialized by request. This serialization is necessary since the extractor within a request delivers each key once, and otherwise changes in the non-key fields are not copied over correctly. It only supports the addition of fields. It supports an update in an ODS object as well as in an InfoCube. This delta process is used by LIS DataSources. (technical name of the delta process in the system): ADD)
       3.      Forming deltas with after image, which are updated directly in the delta queue. This serializes data by packet since the same key can be copied more than once within a request. It does not support the direct update of data in an InfoCube. An ODS object must always be in operation when you update data in an InfoCube. For numeric key figures, for example, this process only supports overwriting and not adding, otherwise incorrect results would come about. It is used in FI-AP/AR for transferring line items, while the variation of the process, where the extractor can also send records with the deletion flag, is used in this capacity in BBP. (technical name of the delta process in the system): AIM/AIMD)