Difference between class alv and function alv in SAP ABAP?
- Class alv and Function alv are different in terms of features. Below is the difference:
- Class alv are secured as compared to function alv.
- While using class alv, it improves the performance.
- With use of function alv, you can create screens using function module however you need to call separate programs to generate screen.
- Class alv provides Object Oriented functionality and hence they are easily reusable.
- You can execute function modules asynchronously and can also be called by other systems remotely.
Below is an example of class ALV:
DATA: lcl_alv TYPE REF TO cl_gui_alv_grid,
t_gly TYPE STANDARD TABLE OF Travels .
SELECT * FROM Travels INTO TABLE t_gly.
CREATE OBJECT lcl_alv
EXPORTING I_PARENT = cl_gui_container=>screen0.
CALL METHOD lcl_alv->set_table_for_first_display
EXPORTING
I_STRUCTURE_NAME = 'Travels'
CHANGING
IT_OUTTAB = t_gly.
CALL SCREEN 100.
Few of function module to create ALV reports:
Sr.No | Function Module & Description |
1 | REUSE_ALV_LIST_DISPLAY
Display an ALV list
|
2 | REUSE_ALV_GRID_DISPLAY
Display an ALV grid
|
3 | REUSE_ALV_COMMENTARY_WRITE
Output list header information
|
4 | REUSE_ALV_VARIANT_F4
Display variant selection dialog box
|
5 | REUSE_ALV_VARIANT_EXISTENCE
Checks whether a variant exists
|
6 | REUSE_ALV_FIELDCATALOG_MERGE Create field catalog from dictionary structure or internal table
|
Below shows the use of function module to display an ALV grid:
DATA: it_spfli TYPE TABLE OF spfli.
SELECT * FROM spfli INTO TABLE it_spfli.
CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
EXPORTING
i_structure_name = 'SPFLI'
TABLES
t_outtab = it_spfli.
Published on 21-Dec-2017 04:36:05
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