topic Re: Differences between LSMW and BDC in Application Development and Automation Discussions

Differences between LSMW and BDC

Former Member — Tue, 25 Apr 2006 05:55:40 GMT

Hi All

Please can you give me the few points about the differences between LSMW and BDC?

Awaiting for your Responce

Praveen

Re: Differences between LSMW and BDC

Former Member — Tue, 25 Apr 2006 05:58:16 GMT

BDC and LSMW are the two data migration techniques (from legacy to SAP) . BDC technique is usually done by ABAPers. It consists of three methods.

1) Call Dialog Method

2) Session Method

3) Call Transaction Method

In the case of Session Method , a BDC Session is created , which has the data and info to run it in batch mode. When the user runs this session, every transactions are run in batch mode and tables are updated.

WHile in call transaction, no session is created. Instead , a report prog is created , which takes input from the file and calls the transaction in Batch mode.

Call dialog method is similar to call transaction, except that updation is done by the calling program itself.This method is obsolete.

Advantages of Batch Input Method are

1)Can process large data volumes

2) data integrity is maintained

Just check these links.

Re: Differences between LSMW and BDC

Former Member — Tue, 25 Apr 2006 05:58:22 GMT

Hai Check with the following document

GOOD

THERE IS THREE TYPE OF METHOD IN BDC

BDC SESSION

CALL TRANSACTION

CALL DIALOG

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:

· 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.

BDC using Call Transaction

BDC using Call transaction involves calling an SAP transaction in back ground from within the ABAP

program. The process involves building an Internal BDC table containing the screen information needed to

execute the required transaction and then passing this to the Call transaction command (See code example).

The full procedure for creating a BDC program is as follows:

What is the difference between batch input and call transaction in BDC?

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.

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

BATINPUT/DIRECT INPUT

A: Batch-inputs can not be used to fill the "delivery due list" screen because it is not a dynpro. This is a standard SAP report. A SAP report (check with "System -> Status") may be called using SUBMIT sentence with the appropriate options . It is preferred to call a report than create a Batch-input program.

GO THROUGH THIS LINK

http://www.guidancetech.com/people/holland/sap/abap/zzsni001.htm

The LSM Workbench is an SAP R/3 based tool that supports the one-time or periodic transfer of data from non-SAP systems ("legacy systems") to SAP systems.

The LSM Workbench helps you to organize your data migration project and guides you through the process by using a clear sequence of steps.

The most common conversion rules are predefined. Reusable conversion rules assure consistent data conversion for different data objects.

LSMW vs DX Workbench

The LSM Workbench covers the following steps:

Read the legacy data from one or several files (e.g. spreadsheet tables, sequential files).

Convert the data from source format to target format.

Import the data using standard interfaces (Batch Input, Direct Input, BAPI, IDoc).

Experiences made in successful implementation projects have shown that using the LSM Workbench significantly contributes to accelerating data migration.

SAP provides this tool along with documentation to customers and partners free of charge.

Users of the LSM Workbench receive the usual support via SAP Net - R/3 Frontend (component BC-SRV-DX-LSM).

Releases:

Version 1.7.2 of the LSM Workbench ("LSMW 1.7.2") available

Attention : LSMW 1.7.2 requires an SAP R/3 system with SAP R/3 4.0 or SAP R/3 4.5.

Version 1.8.0 of the LSM Workbench (1.21mb) ("LSMW 1.8.0") available

Attention : LSMW 1.8.0 requires an SAP R/3 system with SAP R/3 4.6.

Version 3.0 of the LSM Workbench (1.89mb) ("LSMW 3.0") available for Web Application Server 6.10

Attention : LSMW 3.0 requires a SAP WAS 6.10. Functionality of version 1.7.2 and 3.0 are identical !

Version 4.0 of the LSM Workbench ("LSMW 4.0") integrated in Web Application Server 6.20

Attention : LSMW 4.0 is an integrated part of SAP WAS 6.20.

Thanks & regards

Sreenivasulu P

Message was edited by: Sreenivasulu Ponnadi

Re: Differences between LSMW and BDC

Former Member — Tue, 25 Apr 2006 06:08:46 GMT

Hi Praveen,

Provide ur mail ID. I have some related docs for ur issue.

Rgds,

Sumana

Re: Differences between LSMW and BDC

Former Member — Tue, 25 Apr 2006 06:35:43 GMT

Hi,

Refer this thread:

Regards,

Gayathri

Re: Differences between LSMW and BDC

Former Member — Tue, 25 Apr 2006 06:49:34 GMT

Hi Praveen,

The differences between LSMW and BDC are stated as below :

1.lsmw is basically for standard sap application.

BDC is basically for customized applications.

2. In lsmw mapping is take care by sap.

In bdc we have to give mapping concept explicitly.

3. LSMW offers different techniques for migrating data say : Direct input , Batch input recording , BAPI , IDOC.

BDC basically uses recording. There are two methods to implement BDC : (a) Call Trasaction Method

(b) Session Metohd.

4. LSMW is basically designed for Functional consultants who do no coding .

BDC is used by technical consultants , who do coding.

5.In LSMW , Coding cannot be done flexibily as BDC.

On the other hand in BDC ,Coding can be done flexibly to customize applications.

Regards,

Kunal.

Re: Differences between LSMW and BDC

Former Member — Tue, 25 Apr 2006 07:06:50 GMT

GOOD

GO THROUGH THE FOLLOWING LINKS

http://sapveda.com/forum/index.php?s=6d58454172e9590f3c55b3a814f453d5&showtopic=20&view=getlastpost

http://expertanswercenter.techtarget.com/eac/knowledgebaseAnswer/0,295199,sid63_gci1143057,00.html

THANKS

MRUTYUN

Re: Differences between LSMW and BDC

Former Member — Tue, 25 Apr 2006 07:12:42 GMT

Hi Praveen,

For BDC following methods can be used:

1) Batch Input method

2) CALL TRANSACTION

3) CALL DIALOG (obselete)

For LSMW fllowing methods can be used:

1) Batch Input method

2) CALL TRANSACTION

3) CALL DIALOG (obselete)

4) IDocs

5) BAPI

6) Recording

Following are the differences between LSMW and BDC:

1) LSMW is easy way to upload data into SAP because we just have to define a structure and map the data.

2) In LSMW, we do the recording through LSMW only. However, in case of BDC we do the recording through transaction SHDB.

3) LSMW is more preferrable method as it uses the standard programs for data upload. In case of BDC, if screen design changes tomorrow, program will not work(need to do the recording again).

4) In LSMW, very less programming efforts are required. Also, work and time are reduced using LSMW.

Hope it helps.

Regards,

Neeraj Gupta