ABAP ON BW

7/30/2019 ABAP ON BW

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ABAP Programming in BW


ACS/Ver 1.0 Page 1 of 8


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Table of Contents

Purpose..........................................................................................................3Objective........................................................................................................3

Scope............................................................................................................3Common Implementation scenarios of ABAP Programming in BW..........................4

Using Field Symbols in Routines......................................................................10Differences between Transfer/Update Rules and Transformations .......................10

List of useful SAP Standard Programs/Function Modules/Classes..........................11Optimization considerations............................................................................14

Tips for code changes.....................................................................................14

Variants........................................................................................................14



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Purpose

The purpose of this document is to outline and define concepts and strategies that

constitute best practices regarding the use of ABAP programming in BW.

It is strongly suggested that all staff (both senior and new hires) follow this

document closely.

Objective

Objective of this document is to develop programming process guidelines anddevelopment standards considering the possibilities exist for using ABAP to

customize the BW environment to transform the data as requirements dictate, as

well as provide additional processing during extraction and updates.

Scope

ABAP Programming Scope in BW and R/3 extractors

Technical Area Description

BEx User Exit Allows the creation and population of variables andcalculations for key figures and variables on a runtime basis.

This user exit is called each time BEx is executed.

R/3 User Exit This user exit is found in R/3 under CMOD and contains

additional programming that is needed to fill field additions toextract structures. We can also create additional business

logic against data prior to its transfer to BW.

BW TransformationRoutines

Transformation routines are part of transformation ruleswhich are invoked as data is transferred from R/3 to BWData targets, or from within BW from one infoprovider to

another. Transformation rules are each infoobject specific.

BW Start Routines Start routines in BW Transformations are used to manage

whole subsets of source data before Transformation rules aretriggered.

BW End Routines End routines in BW Transformations are used to manage wholesubsets of resulting data from Start routine and

Transformation Rules.

BW Expert Routines Expert Routine is a new feature in BI 7.0 which enables user

can define exactly how the Transformation works. Expertroutines are used only in special scenarios. When an expert

routine is created then all transformations rules along with

start and end routines will get deleted. Some times exert

routines improves the performance of data load even further.

BW DTP Routines DTP Routines are used to do some filtering and calculations on

the selection screen fields depending on the business

requirement.



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BW Infopackage

Routines

Infopackage level routines are used to in scenarios like if

source system need to be selected dynamically, selecting file

name dynamilcally and filtering data coming from source flat

file.

Common Implementation scenarios of ABAP Programming in BW

For BI 7.0, in data staging, there are many aspects that we can write abap

code to deal with data.

1. InfoPackage Routine

The infopackage routine given below is an example to create dynamic file name.



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2. Start Routines

Start routines are processed:

---After the data in written into the PSA

---Before the transformation is processed

Actually, we write ABAP code here is for data cleansing or data consolidation.

3. Transformation Rules

It is processed in the transformation and actually this routine is written for some

particular fields.

In the transformation, select the particular field and right click the rule detail, in the

rule type, choose 'Routine'.



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4. End Routine

End Routine is processed after transformation, actually for data cleansing.

5. Expert Routine



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This type of routine is only intended for use in special cases. You can use the expert routine

if there are not sufficient functions to perform a transformation. The expert routineshould be used as an interim solution until the necessary functions are available in the

standard routine.

While writing routines, in order to dramatically improve performance, the following stepsshould be taken:

Use Internal Tables of Master Data (instead of direct read of physical P-Tables)

Make minimum Select and Read statements.

Necessary Select and Read statements should be executed efficiently by using

(Sort & Binary Search).

Example for the Expert Routine

*Global Section

TYPES:

BEGIN OF CUSTOMER_DATA,

CUSTOMER LIKE /BI0/PCUSTOMER-CUSTOMER,

CUST_CLAS LIKE /BI0/PCUSTOMER-CUST_CLAS,

SALES_OFF LIKE /BI0/0CUSTOMER-SALES_OFF,

END OF CUSTOMER_DATA.TYPES:

BEGIN OF ZCUSTSALES_DATA,

ZCUSTSALES LIKE /BIC/PZCUSTSALE-ZCUSTSALE,

DISTR_CHAN LIKE /BIC/PZCUSTSALE-DISTR_CHAN,

SALES_GRP LIKE /BIC/PZCUSTSALE-SALES_GRP,

END OF CUSTOMER_DATA.

DATA:

LINE_CUSTOMER_DATA TYPE CUSTOMER_DATA,



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LINE_ZCUSTSALE_DATA TYPE ZCUSTSALE_DATA,

ITAB_CUSTOMER_DATA LIKE SORTED TABLE OF LINE_CUSTOMER_DATA,

ITAB_ZCUSTSALE_DATA LIKE SORTED TABLE OF LINE_ZCUSTSALE_DATA.

*Begin of Expert Routine:

*Make the proper Select Statements before(!) looping on the DataPackage

*fill 0CUSTOMER master data into Internal Table:

SELECT DISTINCT CUSTOMER CUST_CLAS SALES_OFF

FROM /BI0/PCUSTOMER

INTO CORRESPONDING FIELDS OF TABLE ITAB_CUSTOMER_DATA

WHERE OBJVERS EQ 'A'.

*fill ZCUSTSALE master data into Internal Table:

SELECT DISTINCT ZCUSTSALE DISTR_CHAN SALES_GRP

FROM /BI0/PZCUSTSALE

INTO CORRESPONDING FIELDS OF TABLE ITAB_ZCUSTSALE_DATA

WHERE OBJVERS EQ 'A'.

*Loop on Data Package to make proper assignments:

DATA:

LINE_DATA_PACKAGE LIKE LINE OF DATA_PACKAGE.

LOOP AT DATA_PACKAGE INTO LINE_DATA_PACKAGE.

*make direct assignments for Result Fields:



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RESULT_FIELDS-MATERIAL = LINE_DATA_PACKAGE-MATERIAL.

RESULT_FIELDS-CUSTOMER = LINE_DATA_PACKAGE-CUSTOMER.

RESULT_FIELDS-ZCUSTSALE = LINE_DATA_PACKAGE-ZCUSTSALE.

RESULT_FIELDS-CALMONTH = LINE_DATA_PACKAGE-CALMONTH.

*Read the proper CUSTOMER data from Internal Table using Binary Search.

CLEAR LINE_CUSTOMER_DATA.

READ ITAB_CUSTOMER_DATA WITH KEY

CUSTOMER = LINE_DATA_PACKAGE-CUSTOMER

INTO LINE_CUSTOMER_DATA BINARY SEARCH.

*Assign read values to Result Fields:

RESULT_FIELDS-CUST_CLAS = LINE_DATA_PACKAGE-CUST_CLAS.

RESULT_FIELDS-SALES_OFF = LINE_DATA_PACKAGE-SALES_OFF.

*Read the proper ZCUSTSALE data from Internal Table using Binary Search.

CLEAR LINE_ZCUSTSALE_DATA.

READ ITAB_ZCUSTSALE_DATA WITH KEY

ZCUSTSALE = LINE_DATA_PACKAGE-ZCUSTSALE

INTO LINE_ZCUSTSALE_DATA BINARY SEARCH.

*Assign read values to Result Fields:

RESULT_FIELDS-DISTR_CHAN = LINE_DATA_PACKAGE-DISTR_CHAN.

RESULT_FIELDS-SALES_GRP = LINE_DATA_PACKAGE-SALES_GRP.



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APPEND RESULT_FIELDS TO RESULT_PACKAGE.

ENDLOOP.

Using Field Symbols in RoutinesField symbols are placeholders or symbolic names for other fields. They do notphysically reserve space for a field, but point to its contents. A field symbol cam

point to any data object. The data object to which a field symbol points is assignedto it after it has been declared in the program.

Whenever you address a field symbol in a program, you are addressing the field that

is assigned to the field symbol. After successful assignment, there is no differencein ABAP whether you reference the field symbol or the field itself. You must assign

a field to a field symbol before you can address it in a program.

Example of using Field Symbols in Routines.

Differences between Transfer/Update Rules and Transformations

In BI 7.0 environment, transformation (formerly called Update/Transfer rules)

requires object oriented ABAP and here are some difference worth noting down

between Object oriented ABAP and ABAP which would help you in working with BI

7.0.

BW 3.5 BI 7.0

Internal Table DATA: BEGIN OF INT_EBELN

OCCURS 0,OI_EBELN LIKE

/BI0/POI_EBELN-OI_EBELN,/BIC/ZMEXPDGRP LIKE

/BI0/POI_EBELN-/BIC/ZMEX

PDGRP,

/BIC/ZMPOVERNO LIKE/BI0/POI_EBELN-/BIC/ZMPO

VERNO,

/BIC/ZMPURSTAT LIKE/BI0/POI_EBELN-/BIC/ZMPURSTAT,

/BIC/ZMPORLSON LIKE/BI0/POI_EBELN-/BIC/ZMPO

RLSON,

/BIC/ZMVALD_PO LIKE

/BI0/POI_EBELN-/BIC/ZMVA

It's 2 step process in BI 7.0. 1st step

declare the structure and in 2nd stepdeclare Internal table referring to the

above structureTYPES: BEGIN OF INT_EBELN_STRU,

OI_EBELN TYPE

/BI0/POI_EBELN-OI_EBELN,

/BIC/ZMEXPDGRP TYPE/BI0/POI_EBELN-/BIC/ZMEXPDGRP,

/BIC/ZMPOVERNO TYPE

/BI0/POI_EBELN-/BIC/ZMPOVERNO,/BIC/ZMPURSTAT TYPE/BI0/POI_EBELN-/BIC/ZMPURSTAT,

/BIC/ZMPORLSON TYPE/BI0/POI_EBELN-/BIC/ZMPORLSON,

/BIC/ZMVALD_PO TYPE

/BI0/POI_EBELN-/BIC/ZMVALD_PO,

END OF INT_EBELN_STRU.



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LD_PO,

END OF INT_EBELN.

DATA: INT_EBELN TYPE TABLE OF

INT_EBELN_STRU.

Reading data from

Internal Table

READ TABLE INT_EBELN

INTO WA_PO WITH KEYOI_EBELN =

DATA_PACKAGE-OI_EBELNBINARY SEARCH.

IF SY-SUBRC = 0.

DATA_PACKAGE-/BIC/ZMVAL

D_PO =

WA_PO-/BIC/ZMVALD_PO.

DATA_PACKAGE-/BIC/ZMEXPDGRP =

WA_PO-/BIC/ZMEXPDGRP.

DATA_PACKAGE-/BIC/ZMPORLSON =WA_PO-/BIC/ZMPORLSON.

DATA_PACKAGE-/BIC/ZMPUR

STAT =

WA_PO-/BIC/ZMPURSTAT.

1st define a Work area and read from

there.WA_PO LIKE LINE OF INT_EBELN

Work Area

READ TABLE INT_EBELN INTO WA_PO

WITH KEY

OI_EBELN = WA_DATA_PACKAGE-

OI_EBELN BINARY SEARCH.

IF SY-SUBRC = 0.

WA_DATA_PACKAGE-/BIC/ZMVALD_PO= WA_PO-/BIC/ZMVALD_PO.

WA_DATA_PACKAGE-/BIC/ZMEXPDGRP

= WA_PO-/BIC/ZMEXPDGRP.WA_DATA_PACKAGE-/BIC/ZMPORLSON = WA_PO-/BIC/ZMPORLSON.

WA_DATA_PACKAGE-/BIC/ZMPURSTA

T = WA_PO-/BIC/ZMPURSTAT.

Data Package Data: DATA_PACKAGE type table of_ty_s_SC_1,

WA_DATA_PACKAGE LIKE LINE OF

DATA_PACKAGE.

Loop Statement LOOP AT DATA_PACKAGE. LOOP AT DATA_PACKAGE INTO

WA_DATA_PACKAGE

List of useful SAP Standard Programs/Function Modules/Classes

Program name Description

RSCDS_NULLELIM Delete fact table rows where all Key Figure values are zero. See

Note 619826.

RSDG_CUBE_ACTIVATE Activation of InfoCubes

RSDG_CUBE_COPY Make InfoCube Copies

RSDG_CUBE_DELETE Delete InfoCubes

RSDG_DODS_REPAIR Activation of all ODS Objects with Navigation Attributes



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RSDG_ODSO_ACTIVATE Activation of all ODS Objects

RSDG_IOBJ_ACTIVATE Activation of all InfoObjects

RSDG_IOBJ_DELETE Deletion of InfoObjects

RSDG_IOBJ_REORG Repair InfoObjects

RSDG_IOBJ_REORG_TEXTS Reorganization of Texts for InfoObjects

RSDG_MPRO_ACTIVATE Activating Multiproviders

RSDG_MPRO_COPY Make Multiprovider Copies

RSDG_MPRO_DELETE Deleting Multiproviders

RS_COMSTRU_ACTIVATE_ALL Activate all inactive Communication Structures

RS_TRANSTRU_ACTIVATE_ALL Activate Transfer Structure

RSAU_UPDR_REACTIVATE_ALL Activate Update Rules

RRHI_HIERARCHY_ACTIVATE Activate Hierarchies

SAP_AGGREGATES_ACTIVATE_FI

LL

Activating and Filling the Aggregates of an InfoCube

SAP_AGGREGATES_DEACTIVATE Deactivating the Aggregates of an InfoCube

RS_PERS_ACTIVATE Activating Personalization in Bex(Inactive are highlighted)

RSSM_SET_REPAIR_FULL_FLAG Convert Full Requests to Repair Full Requests

SAP_INFOCUBE_DESIGNS Print a List of Cubes in The System and Their Layouts

SAP_ANALYZE_ALL_INFOCUBES Create DB Statistics for all InfoCubes

SAP_CREATE_E_FACTTABLES Create Missing E-Fact Tables for InfoCubes and Aggregates

SAP_DROP_EMPTY_FPARTITIONS Locate/Remove Unused or Empty partitions of F-Fact Table

SAP_DROP_TMPTABLES Remove Temporary Database Objects

SAP_RSADMIN_MAINTAIN Add, change, delete RSADMIN table entries

CUBE_SAMPLE_CREATE A fast way to put some "sample" records in an InfoCube. No need

to use Flat files, just enter the value in an ALV-Grid or let fill the

Cube with random value.

SAP_CONVERT_NORMAL_TRANS Convert Basic Cube to Transactional Cube and the opposite wayaround.

Function Module Description (Function Group RRMX)

RRMX_WORKBOOK_DELETE Delete BW Workbooks permanently from Roles & Favorites

RRMX_WORKBOOK_LIST_GET Get list of all Workbooks



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RRMX_WORKBOOK_QUERIES_GET Get list of queries in a workbook

RRMX_QUERY_WHERE_USED_GET Lists where a query has been used

RRMX_JUMP_TARGET_GET Get list of all Jump Targets

RRMX_JUMP_TARGET_DELETE Delete Jump Targets

MONI_TIME_CONVERT Used for Time Conversions.

CONVERT_TO_LOCAL_CURRENCY Convert Foreign Currency to Local Currency.

CONVERT_TO_FOREIGN_CURRENCY Convert Local Currency to Foreign Currency.

TERM_TRANSLATE_TO_UPPER_CASE Used to convert all texts to UPPERCASE

UNIT_CONVERSION_SIMPLE Used to convert any unit to another unit. (Ref. table : T006)

TZ_GLOBAL_TO_LOCAL Used to convert timestamp to local time

FISCPER_FROM_CALMONTH_CALC Convert 0CALMONTH or 0CALDAY to Financial Year or Period

RSAX_BIW_GET_DATA_SIMPLE Generic Extraction via Function Module

RSAU_READ_MASTER_DATA Used in Data Transformations to read master

data InfoObjects

RSDRI_INFOPROV_READ

RSDRI_INFOPROV_READ_DEMO

RSDRI_INFOPROV_READ_RFC

Used to read Infocube or ODS data through RFC

DATE_COMPUTE_DAY

DATE_TO_DAY

Returns a number what day of the week the date falls on.

DATE_GET_WEEK Will return a week that the day is in.

RP_CALC_DATE_IN_INTERVAL Add/Subtract Years/Months/Days from a Date.

RP_LAST_DAY_OF_THE_MONTHS

SLS_MISC_GET_LAST_DAY_OF_MONT

H

Determine Last Day of the Month.

RSARCH_DATE_CONVERT Used for Date Conversions. We can use in Info Package

routines.

RSPC_PROCESS_FINISH To trigger an event in process chain

DATE_CONVERT_TO_FACTORYDATE Returns factory calendar date for a date

CONVERSION_EXIT_PDATE_OUTPUT Conversion Exit for Domain GBDAT: YYYYMMDD ->

DD/MM/YYYY

CONVERSION_EXIT_ALPHA_INPUT Conversion exit ALPHA, external->internal

CONVERSION_EXIT_ALPHA_OUTPUT Conversion exit ALPHA, internal->external

RSPC_PROCESS_FINISH Finish a process (of a process chain)



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RSAOS_METADATA_UPLOAD Upload of meta data from R/3

RSDMD_DEL_MASTER_DATA Deletion of master data

RSPC_CHAIN_ACTIVATE_REMOTE To activate a process chain after transport

Class CL_RSTRAN_STAT Description

DELETE_VERSION_FROM_DB

(Static Method)

For deleting a transformations rule version from

database, helpful if the transformation metadata are corrupted.

Optimization considerations

Use SELECT * with care. Do not use SELECT * when populating internal tables ifNOT all columns are required; only select the necessary columns.

To reduce database access by repeated selections, its better to scan a table onceinto the internal table and then read the internal table using statement

READ TABLE BINARY SEARCH. But be careful and consider resource issues when

selecting into an internal table balance between optimization and memory

resources

Avoid MOVE-CORRESPONDING statements. Instead use MOVE statement and

move fields individually.

Structure of internal table should match the order the fields are returned from the

select statement when selecting into an internal table thereby avoiding usage of the

statement into corresponding fields.

Avoid nested selects if possible.

Be careful using CHECK statements, consider to incorporate the selection criteriainto the select statement.

Tips for code changes

Remove obsolete commented out code as this will aid in program readability and

maintainability.

Document any change in program code with details like reason of change, date ofchange, person responsible and also mark the changed block with begin and end of

block tags.

Variants The Developer is responsible for ensuring test variants are not transported to the

production instance.


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