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Purpose

Explanation of the different types of data loading

Overview

Explanation of Initial extraction and a delta load.

Initial Extraction

Initial upload processes will be triggered by BW which calls the Service API, which itself calls the BW adapter.
The BW adapter stores meta data about which extraction function to call for a particular data source.
The extracted BDOC data will be sent to a mapping function converting the BDOC data into extract structure format.
Before sending this data to BW a BADI is called in order to allow customers to enhance the data source.
The BADI will receive and return the data source data as a flat table.
The data package is then returned to BW Service API which sends data back to BW.

Delta Upload

Change, creation or deletion of CRM objects will be communicated to BWA in a delta mode. Changes will be communicated in BDOC format via the CRM Middleware.
BWA will be called by the Middleware and check its data source meta data and status information for whether this change is relevant for BW or not.
If a BDOC is relevant it will be sent to a mapping function provided by the corresponding one order application.
This mapping function converts the BDOC message into a specific data source extract structure format.
Before sending this data to BW a BADI is called in order to allow customers to enhance the data source.
The BADI will receive and return the data source data as a flat table. Afterwards the data will be sent by the BWA to the generic BW queue.

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