CREATE APPEND STRUCTURE IN ABAP DATA DICTIONARY

APPEND STRUCTRURES :


             APPEND STRUCTURES ARE USED ONLY TO ENHANCE STANDARD TABLES.  STANDARD TABLES MAY HAVE INCLUDE STRUCTURES ALREADY CREATED , BUT IF WE WANT TO ADD SOME MORE FIELDS TO THE STANDARD TABLES, WE NEED TO GO FOR APPEND STRUCTURES.

            APPEND STRUCTURES SHOULD BE ADDED AT THE END OF A STANDARD TABLE. THIS IS A MUST. BECAUSE WE SHOULD NOT CHANGE THE ORIGINAL STANDARD TABLE IN THE MIDDLE.

• ONE THING YOU SHOULD KEEP IN MIND THAT IT MUST BE CREATED IN CUSTOMER NAMESPACE.
• AND THE OTHETHING IS THAT NAME OF APPEND STRUCTURE MUST BE STARTS WITH  ZZ OR YY 
• Let's starts with  BKPF (Account Document Header) Table .

1) On EASY ACCESS Screen use TCODE SE11 .  Now display the table BKPF . And click on append   structure.

2)  Now click on Create Append .

3) Now Give append name startting with ZZ or YY and press enter.

4) Now define field and components for build the append structure .
now save and activate it.