topic bdc in Application Development and Automation Discussions

bdc

Former Member — Thu, 02 Nov 2006 09:11:37 GMT

Hi all

Can anybody explain me about bdc and lsmw please.

Thanks and Regards

vijay

Re: bdc

Former Member — Thu, 02 Nov 2006 09:26:08 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

LSMW:

The LSM Workbench is an R/3-based tool that supports You when transferring data from non-SAP systems ("Legacy Systems") to R/3 once or periodically.

The tool supports conversion of data of the legacy system in a convenient way. The data can then be imported into the R/3 system via batch input, direct input, BAPIs or IDocs.

Furthermore, the LSM Workbench provides a recording function that allows to generate a "data migration object" in an entry or change transaction.

The main advantages of the LSM Workbench:

• Part of R/3 and thus independent of individual platforms

• A variety of technical possibilities of data conversion:

• Data consistency due to standard import techniques:

Batch input

Direct input

BAPIs (Business Application Programming Interfaces)

IDocs (Intermediate Documents)

The import technique to be used in an individual case depends on the business object.

• Generation of the conversion program on the basis of defined rules

• Clear interactive process guide

• Interface for data in spreadsheet format

• Creation of data migration objects on the basis of recorded transactions

• Charge-free for SAP customers and SAP partners

Have a look at below links:

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

http://www.sap-img.com/sap-data-migration.htm

I hope it helps.

Best Regards,

Vibha

*Please mark all the helpful answers

Re: bdc

gopi_narendra — Thu, 02 Nov 2006 09:27:04 GMT

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

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

http://www.sap-img.com/bdc.htm

www.sappoint.com/abap/bdcconcept.pdf

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

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

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

Regards

- Gopi

Re: bdc

Former Member — Thu, 02 Nov 2006 09:35:29 GMT

Hi:

LSMW - The SAP transaction code is 'LSMW'

The Legacy System Migration Workbench (LSMW) is a tool recommended by SAP that you can use to transfer data once only or periodically from legacy systems into an R/3 System.

No ABAP efforts are required for the SAP data migration. However, effort are required to map the data into the structure according to the pre-determined format as specified by the pre-written ABAP upload program of the LSMW.

The LSM Workbench carries out the following tasks:

• Reads the transfer data from one or more files (for example, spreadsheets, sequential files etc.)

• Converts the data from the source format into the target format

We use it for mass changes, i.e. uploading new/replacement data and it is great, but there are limits on its functionality, depending on the complexity of the transaction you are trying to replicate.

BDC -

Transfer of data from legacy system to R/3 is possible through BDC( Batch data communication) . We have the 1.Call transaction method 2. Direct input and the

3. Batch input method for data upload/transfer.

There are 2 steps involved in this data transfer.

1. Conversion 2.SAP data transfer