Wht doe memory id means abap memory?

Question

hi
can any one eloborate me on teh bleow code wht does it means and from where the value of wa_quantiy coming from memory id????
import wa_quantity ( a internal table) in to wa_quantity( internal table) from memory id 'wa_quantity'.
regards
Arora

Answer 1

Nishanth,
To put it in simple: "When ever we need to pass values from one session memory to another session memory we use IMPORT and EXPORT parameters."
By doing this we import value to ABAP memory and Exporting the same from ABAP memory in other sesion. In short ABAP memory is global. Session memory is local .
Example : Suppose wa_quantity is an internal table in one program (say Zprog1) and you are want to use it in another program (say Zprog2) so this internal table will not be available for this program.
What we need to do.
Export wa_quantity from wa_quantity to memory id MID1.
here - Export <same name you need to use in p1> from <name of itab in prg1> to <unique id>
In program 2 : you need to
IMPORT wa_quantity from wa_quantity  from meory id MID1.
You need to have same internal table structure in both programs.
All the very best to you.
- Mohan.