Let me know exact purpose of Free memory statement...

Question

What happens when we write the statement like below:
Free memory id ‘ZBTS_BAPIRET2'.
Kindly let me know exact purpose of that….!
Akshitha.

Answer 1

Hi,
Just Type FREE in the programe and press F! on that ,, no need to post ok all the best
FREE - Resets a data object to its original value and releases the resources
it occupied.
Basic form    FREE f.
Effect        FREE f has the same effect as CLEAR f, namely that a Data
              object f is reset to the initial value corresponding to its
              type.
              Unlike CLEAR, FREE also releases any resources taken up by the
              data object f. This can be important with internal tables ,
              structures containing tables, and table work areas (created
              using TABLES).
              After FREE f, the data object f can be re-addressed at any
              time. The only condition is that you may need to re-allocate
              resources to the object.
Note          If f is an internal table with header line (where the name f
              in a sense has two meanings) the statement FREE f refers to
              the body of the table, and the statement CLEAR f refers to the
              header line.
Note          Performance:
              The runtime required to reset an internal table and free its
              resources depends how much memory the internal table has been
              occupying.
              To reset a small internal table takes around  80 msn (standard
              microseconds), a 200 KB table takes around 700 msn, and a 1 MB
              table around 3500 msn.
              If the table has an index or hash table (because it was  created using INSERT, DELETE or SORT, or edited using
              COLLECT), the runtime increases, since the index or hash table
              also need to be released.
FREE - Releasing an Area of ABAP Memory
Basic form    FREE MEMORY.
               Addition:
               ... ID key
               In an ABAP Objects context, a more severe syntax check is
               performed that in other ABAP areas. See ID must be specified.
Effect        This statement releases an area of  ABAP Memory previously
               created with an EXPORT TO MEMORY statement. After this, an
               IMPORT ... FROM MEMORY statement would return the return code
               4.
Notes         -  FREE MEMORY deletes the entire ABAP-Memory, that is, all of
                  the data exported using EXPORT TO MEMORY.
               -  Please consult Data Area and Modularization Unit
                  Organization documentation as well.
Addition      ... ID key
Effect        Only the ABAP-Memory with ID key is released.
Related       EXPORT TO MEMORY, IMPORT FROM MEMORY
Additional help  Deleting Data Clusters from Memory
Return ->
FREE - Release memory occupied by an external object
Basic form    FREE OBJECT obj.
               Addition
               ... NO FLUSH
Effect        Releases the memory needed for object obj. The object cannot
               be processed afterwards.
               The return code is set as follows:
               SY-SUBRC = 0:  Object was released successfully.
               SY-SUBRC = 1:  Error during communication with SAPgui.
               SY-SUBRC = 2:  Error during function call in SAPgui.
                              The OLE function modules are only implemented
                              in Windows.
Addition      ...NO FLUSH
Effect        Collects all of the FREE OBJECT calls on the application
               server before sending explicitly to the SAPgui in a single
               operation by calling the function module FLUSH.
     FREE OBJECT belongs to a group of key words that allows you to process
external objects with ABAP/4. At present, only the object model OLE2 is
supported, i.e. all objects must be of type OLE2_OBJECT. This type and other
necessary data are defined in the include program OLE2INCL.
Example       Release an EXCEL object:
               INCLUDE OLE2INCL.
             DATA EXCEL TYPE OLE2_OBJECT.
             CREATE OBJECT EXCEL 'Excel.Application'.
             FREE   OBJECT EXCEL.
elated       >CREATE OBJECT, SET PROPERTY, GET PROPERTY, CALL METHOD