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BDC Questions

<b>Hi Friends,

I have some important bdc question... can any one please answer these questions.

advance thanks,

sekhar.

</b>

1)In BDC how can we handle Table Controls?

2)Suppose we are transfer data through BDC from leagacy to SAP and their is some duplicate data in legacy system but we don't want this in SAP system .So how can we check that this data is already exist?

3)Can we use two transaction code in one BDC like XK01 & XD01 if yes how?

4)While uploading a flat file through BDC Call Transaction, the system suddenly get CRASHED. How do I know many records have been updated?

5)In which file format will u upload data in bdc? hw will u do that?

6)Are bdc methods are interfaces or conversions? explain?

7)what is the include used for selection screen for bdc program?

8)In call transaction what is the function module to capture the errors?

9)what is session?

10)hw do u populate the BDCDATA structure?

11)what is the syntax for call transaction?

12)hw do u save data in bdc table?

13)IS it possible to use " call transaction" without a bdc table?

14)differnce between call transaction & session method?

15)what does the mesage parameter indicates?

16)what is synchrouous an asynchronous?

17)What is bdc_okcode?

18)What is the function key values of BDC_OKCODE ie '/00' what this is for?

19)Can you give me one example where we should use only bdc call transaction method

20)In the reports when you press f4 to get list is it possible to pass default value in that value...i.e suppose i have created select option on company code when the user press f4 automatically he should get the default value.

21) How to insert data in table control through bdc ....problem is every system displays different no of rows in the table control when you enter the application....for ex .. purchase order, pur req, bom....

22) Does bdc table acccept data for multiple transactions? if so how?

23) what are the advantages in batch input session?

24)what is the use of 'structure identifiers' in sap?

25)Is there any method called direct input. if so what is it?

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5 Answers

  • Posted on Dec 04, 2007 at 06:01 AM

    Hi Sekhar,

    You have lots of questions in BDC. For your questions there are already answers in fourms. so better search in Fourms Typing the key word ex: for BDC using table control type : <b>'BDC WITH TABLE CONTROL'</b> in fourms . in this way u can find the answers for your questions.

    <b>hope it may be useful to you</b>.

    Regards,

    sunil kairam.

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  • author's profile photo Former Member
    Former Member
    Posted on Dec 04, 2007 at 06:04 AM

    u can find this answer better search in Fourms .

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  • author's profile photo Former Member
    Former Member
    Posted on Dec 04, 2007 at 06:29 AM

    Hi

    1)In BDC how can we handle Table Controls?



    http://www.sap-img.com/abap/bdc-example-using-table-control-in-bdc.htm

    2)Suppose we are transfer data through BDC from leagacy to SAP and their is some duplicate data in legacy system but we don't want this in SAP system .So how can we check that this data is already exist?



    in BDC we can use events with that we can restrict the data

    3)Can we use two transaction code in one BDC like XK01 & XD01 if yes how?

    hi,

    Follow this skeleton logic:

    open_group for tran1

    loop at it_data1.

    *Populate bddata structures

    bdc_insert. for tran1

    endloop.

    close_group. for tran 1

    open_group for tran2

    loop at it_data2.

    *Populate bddata structures

    bdc_insert. for tran2

    endloop.

    close_group. for tran 2

    If you want to record for two transations then you will use same method as one transation.For example if you want to execute two transations like VA01(sales order) and VL01N(delivery).Here first you can record for both transactions seperately and in the function module calling you will call BDC_INSERT two times

    First function module contains Tcode as VA01 and Bdcdata table as data for the va01 transaction and second table contains tcode as VL01N and Bdcdata table conatins data which contains the record data of the delivery recorded data.

    PERFORM open_batch_session USING p_sessa.

    LOOP AT ltcap_int

    WHERE NOT tot_inc IS initial.

    ltcap_int-adj = ltcap_int-adj * -1.

    CONCATENATE ltcap_int-fund '/' ltcap_int-cfc INTO zuonr.

    PERFORM fill_bdc_header.

    PERFORM fill_bdc_lines.

    PERFORM post_entries.

    PERFORM insert_batch_session USING 'FB01'.

    ltcap_int-adj = ltcap_int-adj * -1.

    ENDLOOP.

    PERFORM close_batch_session.

    • perform start_batch_session using p_sessa.

    • Budgets

    WRITE p_fy TO c_fy.

    PERFORM open_batch_session USING p_sessb.

    LOOP AT ltcap_int

    WHERE NOT tot_inc IS initial.

    PERFORM rollup_header.

    PERFORM rollup_line.

    PERFORM rollup_save.

    PERFORM insert_batch_session USING 'FR21'.

    IF NOT ltcap_int-gsef_amt IS INITIAL.

    PERFORM rollup_header_gsef.

    PERFORM rollup_line_gsef.

    PERFORM rollup_save.

    PERFORM insert_batch_session USING 'FR21'.

    ENDIF.

    ENDLOOP.

    PERFORM close_batch_session.

    • perform start_batch_session using p_sessb.

    We can process more than 1 transactions in session method.

    For this we will create the internal tables equilant to transactions and

    Between BDC_open_group and BDC_close_group we will call the BDC_Insert the no.of transactions times and populate the internal tables which contains the data pertaining to diffrent transactions.

    CALL TRANSACTION:

    • Single transaction can be processed always.

    • Synchronous Processing - means Transfers data for a single transaction.

    • Asynchronous and Synchronous Database Update is possible.

    • No Session Log is created

    • Faster as it Asynchronous Update is possible.

    • Returns the SY-SUBRC value.

    SESSION METHOD:

    • Multiple Transactions can be Processed through the same session.

    • Asynchronous processing - means Transfers data for multiple transactions.

    • Synchronous updates only possible - means no transaction is started until the previous transaction has been written to the database.

    • Session log is created.

    • Slower as it is Synchronous Update only.

    • Doesn't return the SY-SUBRC value.

    15)what does the mesage parameter indicates?



    To store error messages ( CALL TRANSACTION )
    data: begin of Tab_Mess occurs 0.
    include structure bdcmsgcoll.
    data : end of Tab_Mess,

    CALL TRANSACTION ‘FK02’ USING BDC_TAB MODE ‘N’ UPDATE ‘S’
    MESSAGES INTO TAB_MESS.
    IF SY-SUBRC NE 0.
    WRITE: / Tab_MESS-TCODE, Tab_MESS-DYNUMB, Tab_MESS-MSGTYP ,
    Tab_MESS-MSGID.
    ENDIF.

    16)what is synchrouous an asynchronous?



    synchrouous



    With synchronous updating, we can check SY-SUBRC to determine the success of the transaction and the actual update to the database.

    DO.

    PERFORM FILL_BDC_TAB.
    CALL TRANSACTION ‘FK02’
    USING BDC_TAB
    MODE ‘N’
    UPDATE ‘S’.
    IF SY-SUBRC < > 0.
    WRITE: /‘ERROR’.
    ENDIF.
    ENDDO.


    Asynchronous



    With asynchronous updating, we can check SY-SUBRC to determine the success of the transaction only, not the actual update to the database.

    DO.

    PERFORM FILL_BDC_TAB.
    CALL TRANSACTION ‘FK02’
    USING BDC_TAB
    MODE ‘N’
    UPDATE ‘A’.
    IF SY-SUBRC < > 0.
    WRITE: /‘ERROR’.
    ENDIF.
    ENDDO.

    17)What is bdc_okcode?



    ok_code is generally used in screen as of I have used. You will define the function in the screen. and you can use it in the main program.

    ok_code acts just as a temporary variable that stores the value of sy-ucomm.
    When user interacts with the screen elements, the function code that you have assigned is filled in the sy-ucomm field which is turn gets reflected in OK_CODE.

    18)What is the function key values of BDC_OKCODE ie '/00' what this is for?


    In your ABAP programs, you should work with the OK_CODE field instead of SY-UCOMM. There are two reasons for this: Firstly, the ABAP program has full control over fields declared within it, and secondly, you should never change the value of an ABAP system field. However, you should also always initialize the OK_CODE field in an ABAP program for the following reason:

    In the same way that the OK_CODE field in the ABAP program and the system field SY-UCOMM receive the contents of the corresponding screen fields in the PAI event, their contents are also assigned to the OK_CODE screen field and system field SYST-UCOMM in the PBO event. Therefore, you must clear the OK_CODE field in the ABAP program to ensure that the function code of a screen is not already filled in the PBO event with an unwanted value. This is particularly important when the next PAI event can be triggered with an empty function code (for example, using ENTER). Empty function codes do not affect SY-UCOMM or the OK_CODE field, and consequently, the old field contents are transported.

    19)Can you give me one example where we should use only bdc call transaction method



    Processing batch input data with CALL TRANSACTION USING is the faster of the two recommended data transfer methods. In this method, legacy data is processed inline in your data transfer program.

    20)In the reports when you press f4 to get list is it possible to pass default value in that value...i.e suppose i have created select option on company code when the user press f4 automatically he should get the default value.



    Refer to that data element it will show default values of the company code

    21) How to insert data in table control through bdc ....problem is every system displays different no of rows in the table control when you enter the application....for ex .. purchase order, pur req, bom....



    http://www.sap-img.com/abap/bdc-example-using-table-control-in-bdc.htm

    22) Does bdc table acccept data for multiple transactions? if so how?

    Same call transaction cannot call more than one Tcode but yeah you can use two call transactions in your program

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  • Posted on Dec 04, 2007 at 07:04 AM

    Hi,

    I solved almost all questions of yours.Please have a look:

    1)In BDC how can we handle Table Controls?

    Ya you can handle table control in BDC.Check the following link and tips:

    For table control in bdc declare two variable as integer.

    set the variable value as 0.In the program before the line

    item perform statement set the counter value as 1.

    count=count+1.then u hv to use the concantenate

    statementfor the line items for example

    concantenate '(lfa1-banks('count'))' into cval

    perform bdc using cval.

    during recording for the line items we hv record for the

    next page also for the line item.goto standard tool bar u

    hv to press the next page button.

    if count=5.

    perform bdc using p+ ->this for next page

    endif

    clear count.

    Here are the example programs

    http://arthur_ong.tripod.com/xab023.htm

    http://www.sap-basis-abap.com/abap/handling-table-control-in-bdc.htm

    http://www.sap-img.com/abap/bdc-example-using-table-control-in-bdc.htm

    2)Suppose we are transfer data through BDC from leagacy to SAP and their is some duplicate data in legacy system but we don't want this in SAP system .So how can we check that this data is already exist?

    While extracting data from legacy system use

    "select distinct" statement.

    This will avoid the duplicate entries.

    3)Can we use two transaction code in one BDC like XK01 & XD01 if yes how?

    Yes you can two transaction codes in BDC.

    Just use recording (SHDB) for this.

    In your case first of all record the transaction XK01 1st then record XD01.

    Declare two separate internal tables and do the BDC as you are doing generally.

    but this method should be avoided,because inconsistency may occur.

    So better to use one transaction per one bdc program.

    4)While uploading a flat file through BDC Call Transaction, the system suddenly get CRASHED. How do I know many records have been updated?

    The records those are not being processed will be errored records in the session log...just process the session again and load the data completely.

    5)In which file format will u upload data in bdc? hw will u do that?

    you can upload data using notepad as well using excel sheet.

    just call function module 'GUI_UPLOAD' and give the file name there.... with ASC or DAT format.It will work.

    Generally in real time we use notepad.

    6)Are bdc methods are interfaces or conversions? explain?

    BDC is only for conversion.BAPI,IDOC are interface methods.

    CONVERSION programs are the ones which have one time usage, usually when a legacy system is being replaced by a system like SAP, then the data has to be mapped from the legacy system to SAP system. Here the data to be converted is given on a flat file & is uploaded to SAP tables mostly using LSMW only. Conversions programs are BDC,BAPI and LSMW programs in which you upload all the related tables from the flat files.Those are one time programs.

    Conversion Program

    http://help.sap.com/saphelp_erp2005/helpdata/en/d3/a65a14e96911d1b401006094b944c8/frameset.htm

    7)what is the include used for selection screen for bdc program?

    include bdcrecx1.

    8)In call transaction what is the function module to capture the errors?

    You can check the errors by creating the session method. Try this code.

    CALL TRANSACTION 'XK01' USING IT_BDCDATA

    MODE P_MODE

    UPDATE P_UPDATE

    MESSAGES INTO IT_MESS.

    IF SY-SUBRC = 0.

    READ TABLE IT_MESS WITH KEY MSGTYP = 'S'.

    IF SY-SUBRC = 0.

    IT_SUCESS-LIFNR = IT_MESS-MSGV1.

    IT_SUCESS-NAME1 = IT_VENDOR-NAME1.

    APPEND IT_SUCESS.

    ADD 1 TO V_SUCESS.

    ENDIF.

    ELSE.

    READ TABLE IT_MESS WITH KEY MSGTYP = 'E'.

    IF SY-SUBRC = 0.

    CALL FUNCTION 'FORMAT_MESSAGE'

    EXPORTING

    ID = SY-MSGID

    NO = SY-MSGNO

    V1 = SY-MSGV1

    V2 = SY-MSGV2

    V3 = SY-MSGV3

    V4 = SY-MSGV4

    IMPORTING

    MSG = IT_ERROR-MESSAGE

    EXCEPTIONS

    NOT_FOUND = 1

    OTHERS = 2.

    IT_ERROR-LINENO = V_INDEX.

    APPEND IT_ERROR.

    ADD 1 TO V_ERROR.

    ENDIF.

    IF V_ERR_1 EQ SPACE.

    CALL FUNCTION 'BDC_OPEN_GROUP'

    EXPORTING

    CLIENT = SY-MANDT

    GROUP = P_EGROUP

    USER = P_EUSER

    KEEP = P_EKEEP

    HOLDDATE = P_EHDATE.

    V_ERR_1 = 'X'.

    ENDIF.

    9)what is session?

    Hi generally a session is basically another SAP instance on your screen. Multiple sessions allow you to work on more than one task at a time. This can save you time and reduces the need to jump from screen to screen.

    You can open up to six sessions, and do a different task, or even the same task, in each one. You can move around between the open sessions, and you can close any session without having to log off from the system.Each session you create is as if you logged on to the system again. Each session is independent of the others. For example, closing the first session does not cause the other sessions to close.

    Refer:

    http://help.sap.com/saphelp_46c/helpdata/en/73/69eb9955bb11d189680000e829fbbd/frameset.htm

    http://help.sap.com/saphelp_46c/helpdata/en/73/69eb9955bb11d189680000e829fbbd/frameset.htm

    http://help.sap.com/saphelp_46c/helpdata/en/73/69eb9955bb11d189680000e829fbbd/frameset.htm

    http://help.sap.com/saphelp_46c/helpdata/en/73/69eb9955bb11d189680000e829fbbd/frameset.htm

    But if you are asking related to BDC then,

    this is nothing but to upload no of records from legacy to SAP in a batch manner

    What is BDC or batch input

    The Batch Input is a SAP technic that allows automating the input in transactions. It lies on a BDC (Batch Data Commands) scenario.

    BDC functions:

    E BDC_OPEN_GROUP : Opens a session group

    E BDC_CLOSE_GROUP : Closes a session

    E BDC_INSERT : Insert a BDC scenario in the session

    E The ABAP statement "CALL TRANSACTION" is also called to run directly a transaction from its BDC table.

    It runs the program RSBDCSUB in order to launch automatically the session. The session management is done through the transaction code SM35.

    The object itself is maintanable through the transaction SE24.

    BDC methods:

    Method

    Description

    Parameters

    OPEN_SESSION

    Opens a session

    SUBRC (Return Code ? 0 OK)

    SESSIONNAME (Session to be created)

    CLOSE_SESSION

    Closes a session

    None

    RESET_BDCDATA

    Resets the BDC Internal Table...

    None. Normally, for internal purposec

    BDC_DYNPRO

    Handles a new screen

    PROGNAME (Name of the program)

    DYNPRONR (Screen Number)

    BDC_FIELD

    Puts a value on the screen

    FIELDNAME (Name of the field)

    FIELDVALUE (Value to be passed)

    CONSTRUCTOR

    Constructor - Initializes NO_DATA

    NODATA (No data character). The constructor is called automatically when the object is created.

    RUN_SESSION

    Launches a session with RSBDCBTC

    None

    CALL_TRANSACTION

    Calls a transaction with the current BDC Data

    MODE (Display Mode)

    UPDATE (Update Mode)

    TCODE (Transaction to be called)

    BDC_INSERT

    Inserts the BDC scenario in the session

    TCODE (Transaction to be called)

    BDC techniques used in programs:

    a) Building a BDC table and calling a transaction,

    b) Building a session and a set of BDC scenarios and keeping the session available in SM35,b

    c) Building a session and lauching the transaction right after closing the session.

    10)hw do u populate the BDCDATA structure?

    BDCDATA is a structure which consists of these fields for the processing of a transaction. So we have to declare an internal table of BDCDATA to store all this data.

    BDCDATA fields:

    PROGRAM -> Name of the Program

    DYNPRO -> Screen No

    DYNBEGIN -> At the start of a new screen we have to set it to 'X' or else ' '.

    FNAM -> Name of the Screen field where data has to be entered

    FVAL -> Value for Screen field

    remember to clear the internal table (BDCDATA) before calling the transction .

    Suppose you have a loop like this

    DATA: bdcdata LIKE bdcdata OCCURS 0 WITH HEADER LINE.

    loop at it_final.

    CLEAR bdcdata.

    REFRESH bdcdata.

    PERFORM bdc_dynpro USING 'SAPMP50A' '1000'.

    PERFORM bdc_field USING 'BDC_OKCODE'

    '=COP'.

    PERFORM bdc_field USING 'RP50G-PERNR'

    it_final-pernr. "'4317'.

    CALL TRANSACTION 'PA30' USING bdcdata.

    endloop.

    ----


    • Start new screen *

    ----


    FORM BDC_DYNPRO USING PROGRAM DYNPRO.

    CLEAR BDCDATA.

    BDCDATA-PROGRAM = PROGRAM.

    BDCDATA-DYNPRO = DYNPRO.

    BDCDATA-DYNBEGIN = 'X'.

    APPEND BDCDATA.

    ENDFORM.

    ----


    • Insert field *

    ----


    FORM BDC_FIELD USING FNAM FVAL.

    IF FVAL <> NODATA.

    CLEAR BDCDATA.

    BDCDATA-FNAM = FNAM.

    BDCDATA-FVAL = FVAL.

    APPEND BDCDATA.

    ENDIF.

    ENDFORM.

    Above includes are available in include BDCRECXX.

    11)what is the syntax for call transaction?

    see the following Example:

    CALL TRANSACTION 'SE38' USING BDCDATA MODE 'N'

    MESSAGES INTO ITAB.

    12)hw do u save data in bdc table?

    THIS QUESTION IS NOT CLEAR...please ask it again clearly.

    13)IS it possible to use " call transaction" without a bdc table?

    You should use BDCTABLE

    The process flow of CALL TRANSACTION

    A program that uses CALL TRANSACTION USING to process legacy data should execute thefollowing steps:

    Prepare a BDCDATA structure for the transaction that you wish to run.

    Prepare a internal table to store error messages Tab_Mess like structure of BDCMSGCOLL.

    With a CALL TRANSACTION USING statement, call the transaction and prepare the BDCDATA structure. For example:

    CALL TRANSACTION ‘MM01' USING BDCDATA MODE 'A' UPDATE 'S'. MESSAGES INTO TAB_MESS.

    IF SY-SUBRC <> 0.

    <Error_handling>.

    ENDIF.

    Otherwise in that case the current program is suspended, the transaction specified is brought up, and a user must enter the data into the screens.

    14)differnce between call transaction & session method?

    Session method.

    1) synchronous processing.

    2) can tranfer large amount of data.

    3) processing is slower.

    4) error log is created

    5) data is not updated until session is processed.

    6) generally used for back ground jobs.

    7) at atime we can update to more than one screens.

    Call transaction.

    1) asynchronous processing

    2) can transfer small amount of data

    3) processing is faster.

    4) errors need to be handled explicitly

    5) data is updated automatically

    6) for background n fore ground jobs.

    7) at atime we can update to a single screen.

    15)what does the mesage parameter indicates?

    16)what is synchrouous an asynchronous?

    In syncronous method you will receive acknowledgement and in asyncronous you wont get any acknowledgement.

    17)What is bdc_okcode?

    BDC_OKCODE: It is the Function Code , Sap provide Function code for every user action, like when user clike any button or menu item each and every thing having Function code, that is called OKcode.

    u can see okcode Like: 1 single click on one button on screen & drake

    ur mouse cursor down (out of sap screen) then press F1

    2. U can see Function code

    18)What is the function key values of BDC_OKCODE ie '/00' what this is for?

    IF okcode = /00,

    it means 'ENTER'

    That is when u execute ur BDC in foreground, this /00 comes, implying u shud press "ENTER".

    19)Can you give me one example where we should use only bdc call transaction method

    any bdc program you can do in call transaction method.

    And that is your wish what you want to use.

    20)In the reports when you press f4 to get list is it possible to pass default value in that value...i.e suppose i have created select option on company code when the user press f4 automatically he should get the default value.

    use function module for F4 entry under the event "at selection screen on value request".

    and the FM is F4IF_FIELD_VALUE_REQUEST or F4IF_INT_TABLE_VALUE_REQUEST.

    21) How to insert data in table control through bdc ....problem is every system displays different no of rows in the table control when you enter the application....for ex .. purchase order, pur req, bom....

    Check those links I had givem for your previous question and try out.

    22) Does bdc table acccept data for multiple transactions? if so how?

    23) what are the advantages in batch input session?

    the advantage is the session itself...bcz you can identify errors easily using the error log.

    24)what is the use of 'structure identifiers' in sap?

    No idea regarding this.

    25)Is there any method called direct input. if so what is it?

    Direct Input (DI) programs are similar to Batch Input(BI) programs. The difference being is, instead of processing screens they validate fields and directly load the data into tables using standard function modules. For this reason, DI programs are generally faster (RMDATIND - Material Master DI program works at least 5 times faster than the BDC counterpart) and so is suited for loading large volumes of data.

    Please reward.

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  • author's profile photo Former Member
    Former Member
    Posted on Dec 04, 2007 at 07:16 AM

    check the answers:

    1)In BDC how can we handle Table Controls?

    2)Suppose we are transfer data through BDC from leagacy to SAP and their is some duplicate data in legacy system but we don't want this in SAP system .So how can we check that this data is already exist?

    so for this just validate the data before you call transaction and this is possible as:

    • Validating file records

    FORM vendor_check.

    • loop for validating all records of it_src

    LOOP AT it_src.

    • deleting blank records.

    IF it_src IS INITIAL.

    DELETE it_src.

    v_records = v_records - 1.

    CONTINUE.

    ENDIF.

    • translating records of it_src into upper case

    TRANSLATE it_src-ktokk TO UPPER CASE.

    TRANSLATE it_src-land1 TO UPPER CASE.

    MODIFY it_src.

    g_desc = ' '.

    • checking blank value in vendor field of it_src

    IF it_src-lifnr EQ ' '.

    • storing all error messages in g_desc

    CONCATENATE g_desc text-039 INTO g_desc SEPARATED BY ','.

    ELSE.

    • validating particular vendor already created or not using check table

    CALL FUNCTION 'CONVERSION_EXIT_ALPHA_INPUT'

    EXPORTING

    input = it_src-lifnr

    IMPORTING

    output = v_lifnr.

    READ TABLE it_validate_lfa1 WITH KEY lifnr = v_lifnr.

    IF sy-subrc = 0.

    CONCATENATE g_desc text-039 INTO g_desc SEPARATED BY ','.

    ENDIF.

    ENDIF.

    3)Can we use two transaction code in one BDC like XK01 & XD01 if yes how?

    yes just make two internal table of bdc data and call two different transactions one by one and pass related internal tables.

    4)While uploading a flat file through BDC Call Transaction, the system suddenly get CRASHED. How do I know many records have been updated?

    for this just put check after call transaction and check agianst sy-msgty as:

    • checking whether system generated any error message or not

    IF sy-msgty ne 'E' and sy-subrc eq 0.

    then move thta record into success file

    else

    move that record into error file.

    endif.

    5)In which file format will u upload data in bdc? hw will u do that?

    prefarrably text file with tab delimited.

    6)Are bdc methods are interfaces or conversions? explain?

    7)what is the include used for selection screen for bdc program?

    you can develop input selection screen as include which can be used in many other programs. so just call that input selection screen in your bdc program and it will design the input screen.

    8)In call transaction what is the function module to capture the errors?

    CALL FUNCTION 'TB_MESSAGE_BUILD_TEXT'

    this will return the messages which are returned by transcation

    and you can check for errors with sy-msgty and sy-subrc as expalined above.this is the best way to identify error records.

    9)what is session?

    it is a background job and you can attach your bdc program to it and based on priority or FIFO bdc program will be executed by own with out notifying user. and this is possible through TCODE SM36

    10)hw do u populate the BDCDATA structure?

    declare this

    DATA: it_bdc TYPE bdcdata OCCURS 100 WITH HEADER LINE.

    using PERFORM bdc_dynpro USING 'SAPMF02K' '0107'.

    this will populate the bdc table with screen name and screen no.

    aND PERFORM bdc_field USING 'LFA1-NAME1' it_src-name1.

    this will populate the bdc data with screen field name and data for that screen from table.

    &----


    *& Form bdc_dynpro

    &----


    FORM bdc_dynpro USING screen_name screen_number.

    it_bdc-program = screen_name.

    it_bdc-dynpro = screen_number.

    it_bdc-dynbegin = 'X'.

    APPEND it_bdc.

    CLEAR it_bdc.

    ENDFORM. "bdc_dynpro

    &----


    *& Form bdc_field

    *&----


    FORM bdc_field USING field_name field_val.

    it_bdc-fnam = field_name.

    it_bdc-fval = field_val.

    APPEND it_bdc.

    CLEAR it_bdc.

    ENDFORM. "bdc_field

    this will populate your bdc table that you will pass it to call transaction and at one time it will be having data for one record.

    11)what is the syntax for call transaction?

    CALL TRANSACTION 'MK01'

    USING it_bdcdata "internal table for bdc data

    MODE 'N'

    MESSAGES INTO messtab. "store returned messages into messtab.

    12)hw do u save data in bdc table?

    see answer no. 11

    13)IS it possible to use " call transaction" without a bdc table?

    no. i wont think so

    14)differnce between call transaction & session method?

    session is for job means your bdc program will run by its own as a background job.

    15)what does the mesage parameter indicates?

    for storing returned messages of transaction into message table

    16)what is synchrouous an asynchronous?

    sync means that it will access your internal table that you will pass sequentially and oone by one. and in asyn it will access your file records randomly and can access multiple records at a same time and pass it to call transaction .

    17)What is bdc_okcode?

    it is the code that tells what action you have performed after filling the data in all fields of screen or you can say the code

    to move to next screen or finally leaving the screen.

    18)What is the function key values of BDC_OKCODE ie '/00' what this is for?

    this is for enter

    19)Can you give me one example where we should use only bdc call transaction method

    20)In the reports when you press f4 to get list is it possible to pass default value in that value...i.e suppose i have created select option on company code when the user press f4 automatically he should get the default value.

    SELECT-OPTIONS : s_week FOR v_week NO INTERVALS NO-EXTENSION MODIF ID wk.

    at selection-screen on value-request for s_week.

    LOOP AT SCREEN.

    IF screen-group1 = 'WK' .

    s_week = 'default value'.

    MODIFY SCREEN.

    ENDIF.

    ENDLOOP.

    21) How to insert data in table control through bdc ....problem is every system displays different no of rows in the table control when you enter the application....for ex .. purchase order, pur req, bom....

    22) Does bdc table acccept data for multiple transactions? if so how?

    23) what are the advantages in batch input session?

    24)what is the use of 'structure identifiers' in sap?

    25)Is there any method called direct input. if so what is it?

    plz reward points if helps.

    regards,

    rahul

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