Function Module Extractor with Delta

[Former Member]

I'm very new to working with the BW, so I hope I'm explaining my question in a way that makes sense.

I need to make a BW extractor that pulls data from at least one table, possibly more, and which also calculates some data.

I think the only way I can do that is by using an extractor with a function module.

I've been looking at the examples in function group RSAX, and I think I sort of get it, except for one part.

I'm really confused about how the delta works.

I'm looking at the example: RSAX_BIW_GET_DATA_SIMPLE

Does it even use a delta?

I'm trying to understand how the delta gets passed, and how it gets used to filter the data in the function module. I'm not sure if it's something I need to code in myself, or if it's something that BW does by itself, or what.

I'm not sure if I'm making sense, but if anyone could help me, I'd appreciate it.

[Former Member]

1. When you create your data source in RSO2, there is a push button "delta" press that and you will see the settings that you can make for delta.

2. If you pull just one table, then you can try doing the data manipulations on BW side, which is not hard compared to writing a FM in R/3.

Ravi Thothadri