BDCDATA structure in depth

BDCDATA structure stores the data that needs to be transferred to the SAP system.

The structure has the following fields.

PROGRAM
Name of the program.

DYNPRO
Screen Number

DYNBEGIN
Marks the beginning of a screen in a transaction

FNAM
Field NAme

FVAL
Field value.

The records can be divided into screen records and field records.

Each screen of the transaction is assigned a row in the BDCDATA structure.
This row contains Program,Dynpro and Dynbegin fields.
Dynbegin is set to 'X' to mark the beginning of the screen.

A record is assigned for each of the values entered.
These field records have only FNAM and FVAL.

The function codes of commands entered during the transaction are
entered in the structure too.