Extraction Using Functional Module

Extraction using Functional Module

A program is something that accepts an input , Do processing and delivers output..

Structure of a program will look like this...

Now consider a program logic that we do repeatedly in our program... It is not a good method to write code for that logic each time .. so we create a functional module...

Functional module is just another program which is global.. and can be accesses by all other programs...

Now each time we don't have to write code for that program... we just need to call that functional module ..

Through out the logic of program we are accessing ECC tables ( Transaction table), which will affect the efficiency of transaction system..

To overcome this we use Internal tables..

Data from ECC table will be moved to this internal table.. and program access only this internal table not ECC tables...

When we click on start button of Infopackage  our functional module is triggered..

E_T_DATA is our internal table which stores data from program logic and will be having the same structure of Extract structure of Datasource...

Steps

1. Create a structure with necessary fields.

2. Create Functional Module.       * Extract data to the structure created       * Give the name of Datasource which is going to use this functional module

3. Create Datasource       * Add name of the structure and Functional Module while creating datasource

Step 1

Create structure.

Goto Tcode SE11 ( ABAP Data Dictionary)

Add all the necessary fields needed in our structure.

NETWR is a currency field so it must have reference field that is in the base table. Click Currency / Quan and give that field name.

Activate the structure..

Step 2

Create Functional Module

Goto Tcode SE80 ( ABAP Workbench)

Now we have created a copy of Functional Group and Functional Module..

go to source code tab and paste the following code..

FUNCTION ZRSAX_BIW_GET_DATA_SIMPLE4_2.*"----------------------------------------------------------------------

*"*"Local Interface:*"  IMPORTING*"     VALUE(I_REQUNR) TYPE  SRSC_S_IF_SIMPLE-REQUNR*"     VALUE(I_DSOURCE) TYPE  SRSC_S_IF_SIMPLE-DSOURCE OPTIONAL*"     VALUE(I_MAXSIZE) TYPE  SRSC_S_IF_SIMPLE-MAXSIZE OPTIONAL*"     VALUE(I_INITFLAG) TYPE  SRSC_S_IF_SIMPLE-INITFLAG OPTIONAL*"     VALUE(I_READ_ONLY) TYPE  SRSC_S_IF_SIMPLE-READONLY OPTIONAL*"     VALUE(I_REMOTE_CALL) TYPE  SBIWA_FLAG DEFAULT SBIWA_C_FLAG_OFF*"  TABLES*"      I_T_SELECT TYPE  SRSC_S_IF_SIMPLE-T_SELECT OPTIONAL*"      I_T_FIELDS TYPE  SRSC_S_IF_SIMPLE-T_FIELDS OPTIONAL*"      E_T_DATA STRUCTURE  ZNVBAK1 OPTIONAL*"  EXCEPTIONS*"      NO_MORE_DATA*"      ERROR_PASSED_TO_MESS_HANDLER*"----------------------------------------------------------------------* Example: DataSource for table SFLIGHTTABLES: ZNVBAK1.                                                                    "Name of Structure"* Auxiliary Selection criteria structureDATA: L_S_SELECT TYPE SRSC_S_SELECT.* Maximum number of lines for DB tableSTATICS: S_S_IF TYPE SRSC_S_IF_SIMPLE,* counterS_COUNTER_DATAPAKID LIKE SY-TABIX,* cursorS_CURSOR TYPE CURSOR.* Select ranges* RANGES: L_R_CARRID FOR SFLIGHT-CARRID,

RANGES: SDNO FOR znvbak1-VBELN.* Initialization mode (first call by SAPI) or data transfer mode* (following calls) ?IF I_INITFLAG = SBIWA_C_FLAG_ON.

************************************************************************* Initialization: check input parameters* buffer input parameters* prepare data selection************************************************************************* Check DataSource validityCASE I_DSOURCE.WHEN 'ZFMEDS4'.                                                   " Name of Datasource"WHEN OTHERS.IF 1 = 2. MESSAGE E009(R3). ENDIF.* this is a typical log call. Please write every error message like thisLOG_WRITE 'E' "message type'R3' "message class'009' "message numberI_DSOURCE "message variable 1' '. "message variable 2

RAISE ERROR_PASSED_TO_MESS_HANDLER.ENDCASE.APPEND LINES OF I_T_SELECT TO S_S_IF-T_SELECT.* Fill parameter buffer for data extraction callsS_S_IF-REQUNR = I_REQUNR.S_S_IF-DSOURCE = I_DSOURCE.S_S_IF-MAXSIZE = I_MAXSIZE.* Fill field list table for an optimized select statement* (in case that there is no 1:1 relation between InfoSource fields* and database table fields this may be far from beeing trivial)APPEND LINES OF I_T_FIELDS TO S_S_IF-T_FIELDS.ELSE.

* First data package -> OPEN CURSORIF S_COUNTER_DATAPAKID = 0.* Fill range tables BW will only pass down simple selection criteria* of the type SIGN = 'I' and OPTION = 'EQ' or OPTION = 'BT'.* LOOP AT S_S_IF-T_SELECT INTO L_S_SELECT WHERE FIELDNM = 'CARRID'.* MOVE-CORRESPONDING L_S_SELECT TO L_R_CARRID.* APPEND L_R_CARRID.* ENDLOOP.** LOOP AT S_S_IF-T_SELECT INTO L_S_SELECT WHERE FIELDNM = 'CONNID'.* MOVE-CORRESPONDING L_S_SELECT TO L_R_CONNID.* APPEND L_R_CONNID.* ENDLOOP.LOOP AT S_S_IF-T_SELECT INTO L_S_SELECT WHERE FIELDNM = 'VBELN'.MOVE-CORRESPONDING L_S_SELECT TO SDNO.

APPEND SDNO.ENDLOOP.* Determine number of database records to be read per FETCH statement* from input parameter I_MAXSIZE. If there is a one to one relation* between DataSource table lines and database entries, this is trivial.* In other cases, it may be impossible and some estimated value has to* be determined.OPEN CURSOR WITH HOLD S_CURSOR FOR* SELECT (S_S_IF-T_FIELDS) FROM SFLIGHT* WHERE CARRID IN L_R_CARRID AND* CONNID IN L_R_CONNID.

SELECT VBAK~VBELN VBAK~ERDAT VBAK~NETWR VBAP~MATNRVBAP~POSNRFROM VBAKINNER JOIN VBAP on VBAK~VBELN = VBAP~VBELNWHERE VBAK~VBELN IN SDNO.ENDIF.

FETCH NEXT CURSOR S_CURSORAPPENDING CORRESPONDING FIELDSOF TABLE E_T_DATAPACKAGE SIZE S_S_IF-MAXSIZE.

IF SY-SUBRC <> 0.CLOSE CURSOR S_CURSOR.RAISE NO_MORE_DATA.ENDIF.

S_COUNTER_DATAPAKID = S_COUNTER_DATAPAKID + 1.ENDIF. ENDFUNCTION.

Activate Functional Module..

Step 3

Create Datasource

Goto Tcode RSO2

Click on Save button

Now our data source is ready...

Now lets check if we have data in our Datasource...

Goto RSA3 (Extraction Checker)

so we have data in datasource... Now replicate to BI...

Our Datasource is replicated to BI system...

Our data has successfully reached BI system... Now take it to the corresponding targets