Using BAPI upload excel file for t-code AS02 in SAP

Using BAPI " BAPI_FIXEDASSET_CHANGE " create a zprogram to upload excel file for mass change fixed asset in SAP. REPORT  ZAS02_ASSET_CHANGE_UPLOAD . TYPE-POOLS :  truxs . " Structure for Excel data TYPES :  BEGIN  OF  ty_excel ,          anln1  TYPE  anln1 ,          bukrs  TYPE  bukrs ,          kostl  TYPE  kostl ,          werks  TYPE  werks ,          prctr  TYPE  prctr ,         END  OF  ty_excel . DATA :  lt_excel     TYPE  TABLE  OF  ty_excel ,       ls_excel     TYPE  ty_excel ,     ...
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Use of Clear refresh free & Delete in sap ABAP

In my real life I am facing lots of problem without having knowledge of these concepts. Right now I am sharing these concept with you.Hope it'll help you a lot.

When we define a variable or an internal table in a program after executing it processor allocate memory for that variable.
Example:

data: var_data type c.
write : 'Memory allocation test.'

Here processor allocate memory for that variable.When we write:

Clear: Clear Var_data.
 Its clear the allocate memory for that variable var_data.

Free: Free Var_data:
 The memory allocate free for that variable and can be used for others variable.

Refresh internal_tab:
 Refresh is used only for internal table.when we used refresh internal_table its clear all the entries from the internal table, but memory allocation is still in exist and we can use in within the program.

Delete Var_data or itab_internaltable:
Its delete the variable value or internal table value based on condition.
 

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