Generic Extraction with RDA

Hi,
What scenarios you use RDA when you are extracting data from Generic Extraction among table, view, FM, or SAP Query. Could you please explain with your experiences with examples.
Regards,

I got your question .
There are datasources delivered by SAP and those cab be used by for doing the RDA .
The way to check which datasource are RDA enabled .
1. Go to Se11 . Tabele name - ROOSOURCE
2. Give the name of the datasource and see the value in REALTIME . if it supports the box you fill find
filled in the table entries /
You use real-time data acquisition if you want to transfer data to BI at frequent
intervals (every hour or minute) and access this data in reporting frequently or
regularly (several times a day, at least). The DataSource has to support real-time
data acquisition. The option to support real-time data acquisition is a property of
a DataSource.
DataSources that are released for real-time data acquisition cannot be
used for standard data transfer (scheduled staging).
Rest i am not sure we can create a generic data source and make that RDA enabled .
Assign marks is the best way to appreciate help

Similar Messages

No BERDATUM while generic extraction with LDB ADA

We do a generic extraction to BW with LDB ADA. Therefore it was created an additional field in InfoSet on note ANLAV, where BERDATE=BERDATUM. BERDATUM is a selection parameter in LDB ADA. In extractor checker BERDATE is not filled.
Does anybody have an idea what the problem is?
Regards
Pramid Mehta

Hi,
thanks for that hint. I checked this already. DataSource is ok and the field is not hidden.
Regards
Pramid

Generic extraction with function module

hai experts,
can u please forward the material about Generic extraction using FM
and infoset query with step by step and real-time requirements to my
mail id.([email protected])
Regards
DJReddy

https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/a0f46157-e1c4-2910-27aa-e3f4a9c8df33

Generic Extraction with delta

Hi Every one,
I use an extractor based on a function module which is copy of the RSAX_BIW_GET_DATA_SIMPLE and gets delta records.
I have a doubt of how the communication happens between BW and R/3 when delta info package is ran inorder to get delta records.
Can any one explain how this FM RSAX_BIW_GET_DATA_SIMPLE works ie., the input parameters,usage of static var, Cursors etc?
FUNCTION RSAX_BIW_GET_DATA_SIMPLE.
""Lokale Schnittstelle:
*" 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 SFLIGHT OPTIONAL
*" EXCEPTIONS
*"      NO_MORE_DATA
*"      ERROR_PASSED_TO_MESS_HANDLER
Example: DataSource for table SFLIGHT
TABLES: SFLIGHT.
Auxiliary Selection criteria structure
DATA: L_S_SELECT TYPE SRSC_S_SELECT.
Maximum number of lines for DB table
STATICS: S_S_IF TYPE SRSC_S_IF_SIMPLE,
counter
          S_COUNTER_DATAPAKID LIKE SY-TABIX,
cursor
          S_CURSOR TYPE CURSOR.
Select ranges
RANGES: L_R_CARRID FOR SFLIGHT-CARRID,
          L_R_CONNID FOR SFLIGHT-CONNID.
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 validity
    CASE I_DSOURCE.
      WHEN '0SAPI_SFLIGHT_SIMPLE'.
      WHEN OTHERS.
        IF 1 = 2. MESSAGE E009(R3). ENDIF.
this is a typical log call. Please write every error message like this
        LOG_WRITE 'E'                  "message type
                  'R3'                 "message class
                  '009'                "message number
                  I_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 calls
    S_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.                 "Initialization mode or data extraction ?
Data transfer: First Call      OPEN CURSOR + FETCH
               Following Calls FETCH only
First data package -> OPEN CURSOR
    IF 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.
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.
    ENDIF.                             "First data package ?
Fetch records into interface table.
named E_T_'Name of extract structure'.
    FETCH NEXT CURSOR S_CURSOR
               APPENDING CORRESPONDING FIELDS
               OF TABLE E_T_DATA
               PACKAGE 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.              "Initialization mode or data extraction ?
ENDFUNCTION.
Also how the delta queue is loaded in rsa7 when the delta records made?
When the delta info package is ran, the delta queue in rsa7 is changed to '0'.How is that communication made in between them?
Please clear my doubts?
Regards,
Pra

Hi Suneel,
You can load delta to write optimized DSO. Your Data source will have delta load (through infopackage) and then with DTP (with Extraction Mehtod --> Delta) you can load delta records to this write optimized DSO. So only the new requests, which are not loaded yet will be loaded to WO-DSO. I tried it in system and it works.
They can be used in the following scenarios:
●      You use a write-optimized DataStore object as a temporary storage area for large sets of data if you are executing complex transformations for this data before it is written to the DataStore object. The data can then be updated to further (smaller) InfoProviders. You only have to create the complex transformations once for all data.
●      You use write-optimized DataStore objects as the EDW layer for saving data. Business rules are only applied when the data is updated to additional InfoProviders.
it is used when you don't want to wait for DSO activation and error troubleshooting. It will make raportable data available instantly.
Hope it helps...
Regards,
Ashish
Edited by: Ashish Tewari on May 6, 2009 1:33 PM

How to extract data by using function module in generic extraction please

how to extract data by using function module in generic extraction please give me steps required

Dear Deba,
Generic Extraction via Function Module
/people/siegfried.szameitat/blog/2005/09/29/generic-extraction-via-function-module
If the requirement is like extracting data from multiple tables with some complex logic then views cannot be used..so u cna go for FM is used where it can be achieved.
Chk these
/people/siegfried.szameitat/blog/2005/09/29/generic-extraction-via-function-module
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/a0f46157-e1c4-2910-27aa-e3f4a9c8df33
check the following thread
generic extraction with function module
Generic Extraction with function module
Regards,
Ram.

Generic extraction using table

Hello friends,
We have three methods in Generic extraction, as we know.
1. Using view/Table
2. Using FM
3. Using Infoset Query
I know pretty well the extraction using View, but when do we use "Table"?
Is there a specific method to perform generic extraction using TABLE?
Please clarify

Thanks for the replies.
In case of a generic extraction with view, i've followed the below procedure.
1. RSO2.
2.create a generic datasource by giving a view name and selecting the fields for selection criteria, save and generate.
3. replicate data sources in BW.
4. create an infosource and assign the data source, mapping and create an infopackage to load data.
Now ,
1. how do we enable Delta for this method?
2. Is this possible at all? if yes, how?
3. How do we proceed after the replication of DataSources in BI? specifically, procedure in BI?
Pls clarify.

Generic Extraction creation

HI All,
I want to extract data from two tables from CRM(Z tables).
When I goto RSO2 to create a generic data source it is giving me the options of Extract from View,Extract from Info Set and Extract BY FM.
But when I select Extraction from View it is giving me an option to select from one table only.
HOw can I extract data from two tables?
Please help me
Sridath

Hi,
Check the below links, you will get more info on Generic Extraction.
Generic Extraction:
http://help.sap.com/saphelp_nw70/helpdata/en/28/4c553c42360a40e10000000a114084/frameset.htm
Check the link.
http://www.erpgenie.com/sapgenie/docs/MySAP%20BW%20Cookbook%20Vol%202.pdf
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/84bf4d68-0601-0010-13b5-b062adbb3e33
Refer:
/people/siegfried.szameitat/blog/2005/09/29/generic-extraction-via-function-module
Generic Extraction with Table, View, FM & Infoset
Creating a datasource for generic extraction
Generic Extraction
Customer and Generic extraction difference ?
generic extraction
Re: Generic extractors
generic extraction
Reg
Pra

Generice extracttion with delta

if we do generic extraction with delta in which table luws will be stored

LUW's for generic delta can be monitored in RSA7.
BW Delta queue is based on queue functions in the RFC technology for SAP Web Application servers (qRFC). The data is stored in the following 3 tables:
1. TRFCQOUT (Client Dependent pointer table per queue name and destination.
2. ARFCSSTATE: Likn between TRFCQOUT and ARFCSDARA
3. ARFCSDATA: Compressed data for tRFC/qRFC
refer following: http://help.sap.com/saphelp_nw04/helpdata/en/6f/66bca6ae43744283d74f1e456ff6c0/content.htm for delta queue maintenance.

Issue with generic extraction using FM

Hi All,
I am trying to load from one DSO to other DSO, where i am trying to use generic extraction using FM, where i created strucutre of second DSO .
created Generic datasource with Function module.
when i am loading data using infopackage, its loading perfectly into PSA(with 100 records) and when i am loading thru DTP to Data target( second DSO), it is looping many records in each datapackage(like 8 million in each package) and updating into datatarget finally 100 records. but it is taking long time to finish the process.( i copied RSAX_GET_SIMPLE_DATA) and added transformation logic to it .
so i would like to know, if there is anything i have to change in the Function module code, to fix this.
i would also like to know, request is already in PSA, will it again extract from FM, when updating thru DTP.
Thanks
R,man
Points will be awarded.

Hi
I also had the same process. In the code of the function module. just check the Raise Exception code, probably ABAP guy can help. Also try to debug the code in RSA3 in debug mode. Actually it is going to a infinite loop, I guess.
Regards
Souresh

What is the disadvantage with views in generic extraction?

hi
what is the disadvantage with views in generic extraction?
thanks in advance,
srinivas.

Hi ,
<i>What is disadvantage of generic extraction ? </i>
If i am asking this what you will say ......You have only less points to say if any one ask you like this .
Similarly Generic extraction based on view has many advantegs It was given to extrct data when standard business content data source is not available .
But we know Views can be created when the table you need to extract data has Primary Foreign key relation .So if you need to extarct data from many tables with no relation between them then you cannot use view .
But if you need to extract data from tables that have complex relation ,Then you need to go for Function Module extration and write some ABAP code and using SQL ststements you fetch data from tables based on thier key fields and finally get the desired data by your coding logic .

Generic extraction

Hi,
in generic extraction in which scenarios you extract data from table,view,infoset query,FM
sridhar

Transparent Table
If you're wishing to create a generic DataSource based on a single Transparent Table in the source R3/ECC system, then using that table as the source for your generic DataSource would be appropriate because it will expose all of the columns in that table to your generic extraction structure. There is one exception to this and that is, if you have more than one date field (e.g. Created On and Changed On dates) that you're going to use for generic delta. Pool/Cluster tables and structures wouldn't be allowable for this type of generic DataSource setup.
View on Transparent Tables
If your requirement is to create a generic DataSource based on multiple Transparent Tables in your source R3/ECC system, then a view would be appropriate. You can either use SAP delivered views in the source R3/ECC environment or create a custom view. The same exceptions (generic delta on more than one date field, pool/cluster tables and structures).
Function Module
A custom Function Module can be coded for the extraction of data for a generic DataSource. This type would be appropiate if you're extracting data from pool/cluster tables or structures. Another use for a Function Module as the source for a generic DataSource would be if you're going to use more than one data field for a generic delta. Finally, a Function Module would be used if there is some transformational-type logic required to be done on the extracted data before it is passed to BW.
InfoSet Query
An InfoSet (not to be confused with an InfoSet in BW) query in a source R3/ECC environment, is created in tocde SQ01, and is a way of creating "quick-and-dirty" reports with summarized values, derived values, et. al. This can be used as the basis for a DataSource, if the queries are already built. If not, then a Function Module can perform and necessary aggregations, derivations or other transformational-type logic, instead of creating a query. I say this because I'd highly discourage using this as a source for a generic DataSource because InfoSet queries are usually extremely inefficient and can consume a lot of the valuable system resources.

Urgent: Problems in Generic Extraction by Function Module

Hi BW Gurus,
I am new to SDN and also new to generic extraction using function module. My requirement is to extract long text(142 char) from CRM to BW as the text is not stored in database table I used function module read_text with in another ZXXX function module copy of (RSAX_BIW_GET_DATA_SIMPLE). In my extract structure I used GUID(char,32), Langu, long text(142 char) and 2 placeholders. Text can be extracted by passing STXH table fields(Tdname, Tdid, Tdobject, Tdspars) to read_text as parameters and i also need to use CRMD_ORDERADM_H field GUID(32 char) to compare 1st 32 chars of tdname(70 char) with Guid to select Guids and loop thru this Guids and for each Guid i need to append lines of text to e_t_data but as i donot know ABAP i unable to write the code for this. Through my friends help i wrote code when i check in RSA3 it is displaying the text but when i replicate into BW and load into data target in monitor the status is red with records initially but afterwards it will be red status again with 0 from 0 records for initial load again.when i check on job logs the errors i have are:
The background job has created a job log file of 2Gb size and it is currently on a infinite loop writing entries into the SAP System Log that it cannot write to the Job log file due to Error 22 for write/read access to a file this is because of the datasource i have created. Please find my Function module and if anyone would please correct FM and send me that will be really great.I appreciate it in advance.
MY Function Module is:
FUNCTION Z_CRMORDERH_STR_TXT.
""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 YCRM_TEXT_STR OPTIONAL
*" EXCEPTIONS
*"      NO_MORE_DATA
*"      ERROR_PASSED_TO_MESS_HANDLER
***" EXCEPTIONS     NO_MORE_DATA
*"      ERROR_PASSED_TO_MESS_HANDLER
Tables: CRMD_ORDERADM_H, STXH.
Auxiliary Selection criteria structure
data: l_s_select type srsc_s_select.
Maximum number of lines for DB table
Statics: s_s_if type srsc_s_if_simple,
counter
         s_counter_datapakid like sy-tabix,
Cursor
         s_cursor type cursor.
data: i_crmtext type standard table of TLINE .
types: begin of xsreph ,
          GUID type CRMD_ORDERADM_H-guid,
        end of xsreph.
   data: i_guid type standard table of xsreph.
data: I_TEXT type STXH-TDNAME.
data: xempl like YCRM_TEXT_STR occurs 0 with header line.
data: t_tab like dd03l-tabname.
Select ranges
ranges: l_r_guid for CRMD_ORDERADM_H-guid.
         l_r_connid for sflight-connid.
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 validity
    case i_dsource.
      when 'yCRM_TEXT'. " for S_SREPH1
      when others.
        if 1 = 2. message e009(r3). endif.
this is a typical log call. Please write every error message like this
        log_write 'E'                  "message type
                  'R3'                 "message class
                  '009'                "message number
                i_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 calls
    s_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.
we will do our selection based on what is in the p table for the
infoobject
else.                 "Initialization mode or data extraction ?
Data transfer: First Call      OPEN CURSOR + FETCH
               Following Calls FETCH only
First data package -> OPEN CURSOR
    if 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 = 'GUID'.
        MOVE-CORRESPONDING L_S_SELECT TO L_R_GUID.
        APPEND L_R_GUID.
      ENDLOOP.
      case i_dsource.
        when 'YCRM_TEXT'. " for S_SREPH1
          t_tab = 'CRMD_ORDERADM_H'.
      endcase.
      select GUID
      from (t_tab)
      into table i_guid where   PROCESS_TYPE = 'ZACI' and ( OBJECT_ID < '0000000042').
     select tdname from stxh into i_text where tdobject = 'TEXT'.
     if sy-subrc ne 0.
       message e009(r3).
this is a typical log call. Please write every error message like this
       log_write 'E'                  "message type
                 'R3'                 "message class
                 '009'                "message number
                 i_dsource   "message variable 1
                 'No master data found'.           "message variable 2
       raise error_passed_to_mess_handler.
     endif.
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 CRMD_ORDERADM_H
                              where GUID in L_R_GUID .
                               ENDIF.
Fetch records into interface table.
named E_T_'Name of extract structure'.
   fetch next cursor s_cursor
              appending corresponding fields
              of table e_t_data
              package size s_s_if-maxsize.
    IF SY-SUBRC <> 0.
     CLOSE CURSOR S_CURSOR.
     RAISE NO_MORE_DATA.
   ENDIF.
as we are doing this only once can use the select statement.
***data: crmtext like tline occurs 0 with header line.
**data: i_crmtext type standard table of TLINE.
**data: i_guid type standard table of xsreph.
data: l_guid type THEAD-TDNAME.
data: st_guid type xsreph.
data: st_crmtext type TLINE.
data: lan type THEAD-TDSPRAS.
lan = 'E'.
loop at i_guid into st_guid.
l_guid = st_guid-guid.
CALL FUNCTION 'READ_TEXT'
   EXPORTING
   CLIENT                        = SY-MANDT
     ID                            = 'A002'
     LANGUAGE                      = lan
     NAME                          = l_guid
     OBJECT                        = 'CRM_ORDERH'
   ARCHIVE_HANDLE                = 0
   LOCAL_CAT                     = ' '
IMPORTING
   HEADER                        =
   TABLES
     LINES                         = i_crmtext.
EXCEPTIONS
   ID                            = 1
   LANGUAGE                      = 2
   NAME                          = 3
   NOT_FOUND                     = 4
   OBJECT                        = 5
   REFERENCE_CHECK               = 6
   WRONG_ACCESS_TO_ARCHIVE       = 7
   OTHERS                        = 8
e_t_data-guid = l_guid.
loop at i_crmtext into st_crmtext.
move lan to e_t_data-langu.
move st_crmtext-tdline to e_t_data-description.
append e_t_data.
endif.
endloop.
clear: st_guid,l_guid.
refresh: i_crmtext.
endloop.
S_COUNTER_DATAPAKID = S_COUNTER_DATAPAKID + 1.
endif.
ENDFUNCTION.
please Gurus as I donot know ABAP i appreciate if anyone would write a FM based on requirement and send me that will be really great this is my request. I gurantee of award points for good answers.
Regards
Kishore

Hi,
The statement <b>RAISE NO_MORE_DATA</b> should be active (uncommented) in your code. Otherwise, the infinte loop occurs.
See also, the Siggi's blog:
/people/siegfried.szameitat/blog/2005/09/29/generic-extraction-via-function-module
BTW, was it your thread here:
Re: Urgent: problems in extracting Long Text
Best regards,
Eugene

Problem in creating a generic datasource with infoset

Dear Expert,
I have to create a generic datasource with infoset. I linked the infoset with a test program below. In the program, I have one selection option, which is s_order. After creating an infoset and a datasource, this selection option 'SELECT_S_ORDER' is added to my extract structure. However, after try filtering with this SELECT_S_ORDER, it doesn't filter data at all. Why? I want to filter data with my s_order.
REPORT ZBI_DS_TEST.
tables: vbak.
* DATA
field-symbols: <vbak> type vbak.
data:   t_vbak      type table of vbak,
            w_vbak     type vbak,
            t_vbak2    type table of vbak,
            w_vbak2    type vbak.
* SELECT-OPTIONS
selection-screen begin of block b1 with frame title text-001.
    select-options: s_order   for vbak-vbeln.
selection-screen end of block b1.
    start-of-selection.
* <Query_head>
   perform sub_select_data.
   loop at t_vbak into w_vbak2.
     move-corresponding w_vbak2 to vbak.
* <Query_body>
   endloop.
*&      Form sub_select_data
*      Select data
FORM sub_select_data .
    select *
    into    table t_vbak
    from   vbak
    where vtweg = 'IP'.
ENDFORM.                    " sub_select_data

What do you mean by linking program with infoset?
Do you get the field in your RSA3 Tcode?

Generic Extraction (or) How to use table in R/3 system as datasource in BW?

Hi all,
Hope all are having a great day
Can any1 tell me the steps, for Generic Extraction.
It will be very helpful, if the steps are as much as simpler as posible.
I know to create a simple cube in BW.
I have this much knowledge, depending on this can any1 tell me the steps for Generic Extraction from R/3.
examples wud be vry useful
Regards,
Sourav

hi,
Maintaining Generic DataSources
Use
Independently of application, you can create and maintain generic DataSources for transaction data, master data attributes or texts from any kinds of transparent tables, database views, InfoSets of the SAP query or using a function module. As a result, you can make use of the generic extraction of data.
Procedure
Creating a Generic DataSource(RSO2)
       1.      Select the DataSource type and give it a technical name.
       2.      Choose Create.
The creating a generic DataSource screen appears.
       3.      Choose an application component to which the DataSource is to be assigned.
       4.      Enter the descriptive texts. You can choose any text.
       5.      Choose from which datasets the generic DataSource is to be filled.
                            a.      Choose Extraction from View, if you want to extract data from a transparent table or a database view. Enter the name of the table or the database view.
After generation, you get a DataSource whose extract structure is congruent with the database view or the transparent table view.
For more information about creating and maintaining database views and tables, see the ABAP Dictionary Documentation.
                            b.      Choose Extraction from Query, if you want to use a SAP query InfoSet as the data source. Select the required InfoSet from the InfoSet catalog.
Notes on Extraction Using SAP Query
After generation, you now have a DataSource whose extract structure matches the InfoSet.
For more information about maintaining the InfoSet, see the System Administration documentation.
                            c.      Choose Extraction using FM, if you want to extract data using a function module. Enter the function module and extract structure.
The data must be transferred by the function module in an interface table E_T_DATA.
Interface Description and Extraction Process Flow
For information about the function library, see the ABAP Workbench: Tools documentation.
                            d.      With texts, you also have the option of extraction from domain fixed values.
       6.      Maintain the settings for delta transfer where appropriate.
       7.      Choose Save.
When extracting, look at SAP Query: Assigning to a User Group.
Note when extracting from a transparent table or view:
If the extract structure contains a key figure field, that references to a unit of measure or currency unit field, this unit field must appear in the same extract structure as the key figure field.
A screen appears in which you can edit the fields of the extract structure.
       8.      Editing the DataSource:
        Selection
When scheduling a data request in the BW Scheduler, you can enter the selection criteria for the data transfer. For example, you may want to determine that data requests are only to apply to data from the previous month.
If you set the Selection indicator for a field within the extract structure, the data for this field is transferred in correspondence with the selection criteria in the scheduler.
        Hide field
You should set this indicator to exclude an extract structure field from the data transfer. As a result of your action, the field is no longer made available in BW when setting the transfer rules and generating the transfer structure.
        Inversion
Reverse postings are possible for customer-defined key figures. For this reason, inversion is only possible for certain transaction data DataSources. These include DataSources that have a field that is indicated as an inversion field, for example, the field update mode in the DataSource 0FI_AP_3. If this field has a value, then the data records are interpreted as reverse records in BW.
Set the Inversion indicator if you want to carry out a reverse posting for a customer-defined field (key figure). The value of the key figure is then transferred in inverted form (multiplied by 1) into BW.
        Field only known in exit
You can enhance data by extending the extract structure for a DataSource using fields in append structures.
The indicator Field only known in Exit is set for fields of an append structure. In other words, by default these fields are not passed onto the extractor from the field list and selection table.
Deselect the indicator Field Only Known in Exit to enable the Service API to pass on the append structure field to the extractor together with the fields of the delivered extract structures in the field list as well as in the selection table.
9. Choose DataSource ® Generate.
The DataSource is now saved in the source system.
Maintaining Generic DataSources
        Change the DataSource
To change a generic DataSource, in the initial screen of DataSource maintenance, enter the name of the DataSource and choose Change.
You can change the assignment of a DataSource to an application component as well as the texts of a DataSource. Double-clicking on the name of the table, view, InfoSet or extract structure takes you to the appropriate maintenance screen. Here you can make changes required to add new fields. You can fully swap transparent tables and database views, but not InfoSets. If you return to the DataSource maintenance and choose Create, the screen for editing a DataSource appears. To save the DataSource in the SAP source system, choose DataSource ® Generate.
If you want to test extraction in the source system independently of a BW system, choose DataSource ® Test Extraction.
        Delta DataSource
In the Change Generic DataSource screen, you can delete any DataSources that are no longer relevant. If you are extracting data from an InfoSet, delete the associated query. If you want to delete a DataSource, this must not be connected to a BW system.
For more information about extracting using SAP Query, see Extraction using the SAP Query.
hope this helps.
assign point if so
partha

When we go for Views and Function Modules for Generic Extraction

Hi Experts,
Can you please explain when we go for extracting the data using Views and when we got using Function Modules using Generic Extraction from R/3 system to BW with examples. And also can you explain when we go for delta for the above both scenarios.
Thanks for you help in advance
Rohith

Hi,
Scenario for Extarction using FM
Imagine the scenario where you need to extract data from
tables having no common field between them and thereby preventing you from creating a view on top of those tables..
Or simply consider tables that are highly unrelatd in terms of fields, but you have a requiremnt to extract data from them.
Also Refer.
create generic extractor based on 2 tables
Generic Extraction via Function Module
/people/siegfried.szameitat/blog/2005/09/29/generic-extraction-via-function-module
Steps.
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/a0f46157-e1c4-2910-27aa-e3f4a9c8df33
http://help.sap.com/saphelp_nw04/helpdata/en/86/1c8c3e94243446e10000000a114084/frameset.htm
Scenario for Extraction using View
If there are more number of tables and data in those tables can be represented using joins then we can use this type of extraction
For more info Refer these links
http://help.sap.com/saphelp_nw2004s/helpdata/en/cf/21ecf9446011d189700000e8322d00/frameset.htm
Difference between "Help View" and "Search Help"
http://help.sap.com/saphelp_nw04/helpdata/en/cf/21ed06446011d189700000e8322d00/frameset.htm
for more detailed info look on:
http://www.sap-img.com/abap/what-is-the-different-types-and-usage-of-views.htm
https://www.sdn.sap.com/irj/sdn/wiki?path=/display/home/abap+dictionary&
For GEneric Delta refer these links
[generic with delta;
[https://forums.sdn.sap.com/click.jspa?searchID=11388803&messageID=5164737]

Generic Extraction with RDA

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