BDC (Batch Data Communication) is a technique in SAP used to transfer or upload large volumes of data into the system by automating transactions.

• It simulates manual data entry (like recording keystrokes).
• Commonly used during data migration or mass updates.
• Works by preparing a “session” of transaction data and then processing it.

There are two main methods of BDC:

1. Call Transaction Method → Processes data immediately (online).
2. Session Method → Creates a batch session, which can be processed later.

Common Function Modules for BDC

1. BDC_OPEN_GROUP

• Opens a BDC session (used in Session Method).
• Parameters: session name, client, user, etc.

1. BDC_INSERT

   • Inserts a transaction with its BDC data into the opened session.

2. BDC_CLOSE_GROUP

   • Closes the session after inserting all transactions.

3. CALL TRANSACTION ... USING (not a FM, but a statement)

   • Used in Call Transaction method.

   • Executes transaction immediately with given BDC data.

Example:

DATA: lt_bdcdata TYPE TABLE OF bdcdata,
ls_bdcdata TYPE bdcdata.

” Populate BDC data for transaction (e.g., MM01, FB01 etc.)
ls_bdcdata-program = ‘SAPMM03’.
ls_bdcdata-dynpro = ‘0100’.
ls_bdcdata-dynbegin = ‘X’.
APPEND ls_bdcdata TO lt_bdcdata.

” Open session
CALL FUNCTION ‘BDC_OPEN_GROUP’
EXPORTING
client = sy-mandt
group = ‘ZBDCSAMPLE’
user = sy-uname.

” Insert transaction into session
CALL FUNCTION ‘BDC_INSERT’
EXPORTING
tcode = ‘MM01’
TABLES
dynprotab = lt_bdcdata.

” Close session
CALL FUNCTION ‘BDC_CLOSE_GROUP’.

Example: Using Call Transaction

CALL TRANSACTION ‘MM01’ USING lt_bdcdata MODE ‘A’.

• MODE 'A' → All screens displayed.

• MODE 'N' → No screens (background).

• MODE 'E' → Errors only.