ABAP Memory-----------The memory area of each session contains
an area called ABAP memory. The ABAP memory is available to all
internal sessions. ABAP programs can use the EXPORT and IMPORT
statements to access this shared memoryEXPORT p_name TO MEMORY ID
'TEST1'.IMPORT p_name FROM MEMORY ID 'TEST1'.Here export and import
parameters nme must be same otherwise data will not be
imported.Internal table data can also be passed using ABAP
memoryWhen passing internal table data, make sure that the internal
tables name in both the programs are same .To free the memory id
use below statement.FREE MEMORY ID 'TEST1'.SAP memory----------The
memory area of each session contains an area called SAP memory. The
SAP memory is available to all internal and external sessions. ABAP
programs can use the SET PARAMETER ID and GET PARAMETER ID
statements to access this shared memory.This memory is available
until the system is logoff.Note 1) The mempry id length should not
exceed 20 charatcers and the value should not exceed 255 character
length .otherwise system causes dump.Note 2) Memory ID should not
be blank.SET PARAMETER ID 'AUN' FIELD p_vbeln.GET PARAMETER ID
'AUN' FIELD p_vbeln.Internal table data can't be passed using SAP
memoryCalling a program from another
program---------------------------------------------------SUBMIT-
is a key word used call another executable program from a
programSUBMIT zdemo_called_program. When you use the above
statement, the program zdemo_abap_memory1 will be executed wherethe
statement occurs in calling program and display the result. In this
case selection screen of the called program will not be
shown.SUBMIT zdemo_called_program VIA SELECTION-SCREEN.When we use
VIA SELECTION-SCREEN, the selection screen of called program will
be shown.SUBMIT zdemo_called_program VIA SELECTION-SCREEN AND
RETURN.If you want to come back to the selection screen of the
calling program, AND RETURN should be used.SUBMIT
zdemo_called_program VIA SELECTION-SCREEN WITH p_mat = p_matnr.Here
p_mat is selection screen field of the called program and p_matnr
is the selection screen field of the calling program. So we can
pass the parameter value by specifying like this.If Parameter does
not exist in the called program then it ignores the value.If you
want to pass more than one parameter, then we need use
SELECTION-TABLE .SUBMIT zdemo_called_program VIA SELECTION-SCREEN
WITH SELECTION-TABLE rt_rsparams .Here rt_rsparams must be of type
RSPARAMS.SUBMIT zdemo_called_program VIA SELECTION-SCREEN WITH
SELECTION-TABLE it_rspar AND RETURN.
