What is the memory concept u201CExport to memory idu201D.

Question

Hello Experts!!!
I am new in OOPS programing. Can please somebody tell me what is the memory concept u201CExport to memory idu201D. Also it will make my life so easy if can have few simple examples.
Thanks.

Answer 1

This is from SAP help:
When you specify MEMORY, the data cluster is written to the ABAP Memory with the stated ID id. id is expected to be a flat character-type data object which contains an identification with a maximum of 60 characters. An already existing data cluster with the same identification id is completely overwritten. By the identification in id, a data cluster is identified in the memory and can be read again with the same identification.
Obsolete short form
The addition ID can be omitted outside classes. However, this is prone to errors, as all EXPORT statements without identification overwrite the same data cluster.
ABAP Memory
Memory area within every main session, which the programs with the statements EXPORT and IMPORT can access. This memory area is maintained via a succession of program calls (call sequence).
Note
A data cluster in the ABAP memory is available to all programs within a call sequence, whereby data can be handed over to called programs.
Example
Two fields with two different identifications "P1" and "P2" with the dynamic variant of the cluster definition are written to the ABAP Memory. After execution of the statement IMPORT, the contents of the fields text1 and text2 are interchanged.
TYPES:
  BEGIN OF tab_type,
    para TYPE string,
    dobj TYPE string,
  END OF tab_type.
DATA:
  id    TYPE c LENGTH 10 VALUE 'TEXTS',
  text1 TYPE string VALUE `IKE`,
  text2 TYPE string VALUE `TINA`,
  line  TYPE tab_type,
  itab  TYPE STANDARD TABLE OF tab_type.
line-para = 'P1'.
line-dobj = 'TEXT1'.
APPEND line TO itab.
line-para = 'P2'.
line-dobj = 'TEXT2'.
APPEND line TO itab.
EXPORT (itab)     TO MEMORY ID id.
IMPORT p1 = text2
       p2 = text1 FROM MEMORY ID id.