bdc help

[Former Member]

Frnds, in case of call transaction and session method is there any difference between processing , and <updation> From my knowledge point of view processing means checking each screen and then putting data into them and updation means pusing data into the respective database tables. plzz give me a clear idea of wht is wht as i m very new to abap.. thanking u all.

regards, satya

[Former Member]

frnds...

just clarify my doubt....

thanking u all....

regards,

satya

[Bema]

Hi,

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

Reward, if helpful

[Former Member]

Hi satya,

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

Regards,

Priyanka.

[Former Member]

Thank u frnds,

so u all mean to say that

call transaction :

processing : synchronous

updation : synchronous or asnchronous

______________________________________________________________

session method :

processing : asynchronous

updation method : synchronous

plzz rectify if i am wrong.

regards.

satya

[Former Member]

any hlp dear frnds....

see so that i can be confident in my approach

thnking u.

regards,

satya

[Former Member]

Hi Satya,

What u said is abolutely right. Be confident in that.

Regards,

Priyanka.

[Former Member]

Hi,

Can we provide a check box at selection screen to whether update or not? I mean if the check box is checked then only the transactions will be updated else only processed?

Thanks and Regards

Mahesh.