topic Re: Memory Concepts in Application Development and Automation Discussions

Memory Concepts

Former Member — Tue, 05 Feb 2008 06:11:30 GMT

Hi Gurus,

Please tell me about memory concept of SAP? Also any commands related to it? When to use it and DD tables present for them if any.

Cheers

Martin

Re: Memory Concepts

amit_khare — Tue, 05 Feb 2008 06:15:16 GMT

Refer the thread -

Regards,

Amit

Reward all helpful replies.

Re: Memory Concepts

Former Member — Tue, 05 Feb 2008 06:18:07 GMT

Within a main session, when ever you start an application program, it opens up an internal sessions with in the main session. The internal session has a memory area that contains the ABAP program and its associated data. So when ever you want to pass data between two internal sessions, then you can use ABAP Memory (i.e import, export).

When comes to SAP memory (also known as global memory), if the data has to be passed b/w two main sessions, we can use SAP Memory(SPA/GPA Parameters). SAP Memory can also be used to pass data b/w internal sessions.

http://abapcode.blogspot.com/2007/11/sap-memory-and-abap-memory.html

http://www.sap-img.com/abap/difference-between-sap-and-abap-memory.htm

Rewards if useful.

Re: Memory Concepts

Former Member — Tue, 05 Feb 2008 06:18:36 GMT

Hi Martin,

SAP memory

The SAP memory, otherwise known as the global memory, is available to a user during the entire duration of a terminal session. Its contents are retained across transaction boundaries as well as external and internal sessions. The SET PARAMETER and GET PARAMETER statements allow you to write to, or read from, the SAP memory. Table TPARA

e.g. To pass parameters value to screen.

ABAP/4 memory

The contents of the ABAP/4 memory are retained only during the lifetime of an external session (see also Organization of Modularization Units). You can retain or pass data across internal sessions. The EXPORT TO MEMORY and IMPORT FROM MEMORY statements allow you to write data to, or read data from, the ABAP memory. Table INDX

e.g. To pass values between to programs

plz reward points if helpful..

Regrads,

Madhura.

Re: Memory Concepts

Former Member — Tue, 05 Feb 2008 06:23:41 GMT

There are two cross-program memory areas to which ABAP programs have access. that you can use to pass data between programs.

SAP Memory

SAP memory is a memory area to which all main sessions within a SAPgui have access. You can use SAP memory either to pass data from one program to another within a session, or to pass data from one session to another. Application programs that use SAP memory must do so using SPA/GPA parameters (also known as SET/GET parameters). These parameters can be set either for a particular user or for a particular program using the SET PARAMETER statement. Other ABAP programs can then retrieve the set parameters using the GET PARAMETER statement. The most frequent use of SPA/GPA parameters is to fill input fields on screens

ABAP Memory

ABAP memory is a memory area that all ABAP programs within the same internal session can access using the EXPORT and IMPORT statements. Data within this area remains intact during a whole sequence of program calls. To pass data to a program which you are calling, the data needs to be placed in ABAP memory before the call is made. The internal session of the called program then replaces that of the calling program. The program called can then read from the ABAP memory. If control is then returned to the program which made the initial call, the same process operates in reverse.