sap bw - generic datasource function module (multiple delta fields)

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© 2011 SAP AG 1

SAP BW - Generic Datasource

Function Module (Multiple Delta

Fields)

Applies to:

SAP BW 3.5 / SAP 7.0 Consultants. For more information, visit the EDW HomePage .

Summary

Fetch the delta on multiple fields for Generic Datasource (Transaction Data) based on Function Module Extraction.

Author: Suraj Tigga

Company: Capgemini Consulting

Created on: 20 April 2011

Author Bio

Suraj Tigga is a Senior SAP BI / ABAP consultant at Capgemini Consulting, India. Suraj joined Capgemini Consulting in 2008 and has worked on multiple SAP BI implementation and support projects.

http://www.sdn.sap.com/irj/sdn/edw

SAP BW - Generic Datasource Function Module (Multiple Delta Fields)


© 2011 SAP AG 2

Table of Contents

Scenario .............................................................................................................................................................. 3

Generic Datasource (Multiple Delta Fields) .................................................................................................... 3 Generic Datasource ..................................................................................................................................................... 4

Function Module .......................................................................................................................................................... 4

Execution ..................................................................................................................................................................... 5

Understanding .............................................................................................................................................................. 7

Related Content .................................................................................................................................................. 8

Disclaimer and Liability Notice ............................................................................................................................ 9



© 2011 SAP AG 3

Scenario

SAP BI provides “Generic Delta’ option while creating Generic Datasource to fetch data based on a particular field (present in the extract structure) either with timestamp or date whose values increased monotonously over time. System determines the data volume transferred in the delta method by comparing the maximum value transferred with the last load with the amount of data that has since entered the system. Only the newly arrived data is transferred.

Document describes method to create an extractor based on multiple delta fields using Function Module Extraction. Data for SD Document: Delivery (From tables LIKP and LIPS) would be fetched based on two delta fields (AEDAT: Changed On) and (ERDAT: Date on Which Record Was Created).

Generic Datasource (Multiple Delta Fields)

Generic Datasource would fetch the data from LIKP (SD Document: Delivery Header Data) and LIPS (SD document: Delivery: Item data) based on delta fields AEDAT (Changed On) and ERDAT (Date on Which Record Was Created).

a) Generic Datasource: Define the Function Module based Generic Datasource with AEDAT as a Generic Delta Field.

b) Function Module: Function Module to fetch the data from LIKP and LIPS tables based on delta fields AEDAT and ERDAT.

c) Execution: Explains the delta based on two fields while debugging.

Generic Datasource (YBI_DELIVERY)

Function Module: YBI_DELIVERY_DATA

(Delta Fields: AEDAT and ERDAT)

YBIDELIV BI

ECC



© 2011 SAP AG 4

Generic Datasource

Step1: Create Generic Datasource YBI_DELIVERY based on Function Module YBI_DELIVERY_DATA and Generic Delta Field AEDAT.

‘YBIS_DELOVERY’ is the extract structure similar to the Database View ‘YV_DELIVERY’.

Function Module

Step1: Make a range based on the Generic Delta Field ‘AEDAT’ and use the range while selecting data from Database View ‘YV_DELIVERY’.

Retrieve data from Database View (YV_DELIVERY) based on the range r_delta_date fed to the erdat and aedat in where clause:

Above statement would pick the values from database view YV_DELIVERY based on the range for ERDAT and AEDAT.



© 2011 SAP AG 5

Execution

After the Initialization is executed, check the entries in table ROOSGENDLM (Generic Delta Management for DataSources)

Step1: Go to transaction RSA3 and execute the datasource ‘YBI_DELIVERY’ with update mode ‘D’:

Entries in internal table i_t_select:

Check the entries in range r_delta_date



© 2011 SAP AG 6

Check the entries in the internal table e_t_data:

Extraction Result:



© 2011 SAP AG 7

Understanding

DATE(EXTRACTION) OPT SIGN LOW HIGH START DATE END DATE

Init 20.04.2011 BT I 20.04.2011 20.04.2011

Delta 20.04.2011 BT I 16.04.2011 20.04.2011 20.04.2011 20.04.2011

a) During Initialization the lower limit value of selection would be blank. The higher limit would be filled with current date.

b) During delta request, the lower limit value would be 5 days less than the current date and the higher limit would be the previous delta request. This is due to the fact we had given a safety lower interval as 5 days. As a result, the lower interval was taken as the previous higher interval limit minus 5 days.

c) The enhanced code takes the limit range in the delta load and then prepares a range out of it. And then this range would be used while selecting data from the concerned Database View.

Data loaded (DSO):

Validation:

Datasource Extract:

DSO:



© 2011 SAP AG 9

Disclaimer and Liability Notice

This document may discuss sample coding or other information that does not include SAP official interfaces and therefore is not supported by SAP. Changes made based on this information are not supported and can be overwritten during an upgrade.

SAP will not be held liable for any damages caused by using or misusing the information, code or methods suggested in this document, and anyone using these methods does so at his/her own risk.

SAP offers no guarantees and assumes no responsibility or liability of any type with respect to the content of this technical article or code sample, including any liability resulting from incompatibility between the content within this document and the materials and services offered by SAP. You agree that you will not hold, or seek to hold, SAP responsible or liable with respect to the content of this document.

sap bw - generic datasource function module (multiple delta fields)

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