topic Simple Explanation about BDC. in Application Development and Automation Discussions

Simple Explanation about BDC.

Former Member — Tue, 22 May 2007 11:24:02 GMT

Can any Experienced people around tell me..

What is BDC?

I donk have any idea abt it..

So how do i go about it..Any simple explanation..

Im one of the Trainee, i have created around 4 Screens in my Case Study(Railway Reservation).

So i have created for T-codes for them..

So using these screens, how shud i implement BDC interface on them..?

I need sume basic help and suggestions..

some Theory and examples..both are required

Re: Simple Explanation about BDC.

Former Member — Tue, 22 May 2007 11:26:25 GMT

BDC:

Batch Data Communication (BDC) is the process of transferring data from one SAP System to another SAP system or from a non-SAP system to SAP System.

Features :

BDC is an automatic procedure.

This method is used to transfer large amount of data that is available in electronic medium.

BDC can be used primarily when installing the SAP system and when transferring data from a legacy system (external system).

BDC uses normal transaction codes to transfer data.

Types of BDC :

CLASSICAL BATCH INPUT (Session Method)

CALL TRANSACTION

BATCH INPUT METHOD:

This method is also called as ‘CLASSICAL METHOD’.

Features:

Asynchronous processing.

Synchronous Processing in database update.

Transfer data for more than one transaction.

Batch input processing log will be generated.

During processing, no transaction is started until the previous transaction has been written to the database.

CALL TRANSACTION METHOD :

This is another method to transfer data from the legacy system.

Features:

Synchronous processing. The system performs a database commit immediately before and after the CALL TRANSACTION USING statement.

Updating the database can be either synchronous or asynchronous. The program specifies the update type.

Transfer data for a single transaction.

Transfers data for a sequence of dialog screens.

No batch input processing log is generated.

For BDC:

http://myweb.dal.ca/hchinni/sap/bdc_home.htm

https://www.sdn.sap.com/irj/sdn/wiki?path=/display/home/bdc&;

http://www.sap-img.com/abap/learning-bdc-programming.htm

http://www.sapdevelopment.co.uk/bdc/bdchome.htm

http://www.sap-img.com/abap/difference-between-batch-input-and-call-transaction-in-bdc.htm

http://help.sap.com/saphelp_47x200/helpdata/en/69/c250684ba111d189750000e8322d00/frameset.htm

http://www.sapbrain.com/TUTORIALS/TECHNICAL/BDC_tutorial.html

Check these link:

http://www.sap-img.com/abap/difference-between-batch-input-and-call-transaction-in-bdc.htm

http://www.sap-img.com/abap/question-about-bdc-program.htm

http://www.itcserver.com/blog/2006/06/30/batch-input-vs-call-transaction/

http://www.planetsap.com/bdc_main_page.htm

Reward points if useful

Regards

Anji

Re: Simple Explanation about BDC.

Former Member — Tue, 22 May 2007 11:34:21 GMT

bdc is knothing but batch data communication.it is used to transfter the

data from legacy system i.e non sap to sap system.in case of bdc we need

some coding.but in lsmw there is no need to write the coding for transfer the data.

there are three types of techniques to transfter the data from non sap to sap.

1)recording

2)call transation

3)session method.

Re: Simple Explanation about BDC.

Former Member — Tue, 22 May 2007 11:34:48 GMT

BDC: Batch data Coomunication. Its a procedure for transfering data to SAP system without user dialog.

Go to transaction SM 35

Press Recording to initiate the recording

Enter name of the processing (Z*) and transaction code & press start. It will take u to the initilal screen of that trans.

Make the changes requires.

Finally u will get Batch Input Recording

Get these details in the program. Use itab BDCDATA & fill the corresponding BDC input sequentially to this internal table & finally call transaction with this itab.

Thanks

Sandeep

Reward if helpful

Re: Simple Explanation about BDC.

Former Member — Tue, 22 May 2007 11:49:33 GMT

Hi,

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:

• BDC_OPEN_GROUP : Opens a session group

• BDC_CLOSE_GROUP : Closes a session

• BDC_INSERT : Insert a BDC scenario in the session

• 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…

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:

1) Building a BDC table and calling a transaction,

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

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

Regards,

Anil