Answer Posted / tanmoy

The Session method in BDC utilizes the Function Modules:
BDC_OPEN_GROUP
BDC_INSERT
BDC_CLOSE_GROUP
The data is present in the session is not updated in the
tables until & unless the session is processed by the
transaction SM35. It also updates the data synchronously.
It has an inbuilt error log.

Call Transaction method:
Update the records faster.
It should return the value.
For error records it will be stored in the Internal table
BDCMSGCOLL
Update the Database Both synchronously and asynchronously.

Syntax:
CALL TRANSACTION 'MM01' USING GT_BDCDATA
MODE 'E'
UPDATE gv_update
MESSAGES INTO GT_BDCMSGCOLL.

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