ABAP Select data from SAP table /ACCGO/S_DGR_FWD_DISP_ALV into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /ACCGO/S_DGR_FWD_DISP_ALV table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to /ACCGO/S_DGR_FWD_DISP_ALV. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the /ACCGO/S_DGR_FWD_DISP_ALV table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_/ACCGO/S_DGR_FWD_DISP_ALV TYPE STANDARD TABLE OF /ACCGO/S_DGR_FWD_DISP_ALV,
      WA_/ACCGO/S_DGR_FWD_DISP_ALV TYPE /ACCGO/S_DGR_FWD_DISP_ALV,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: </ACCGO/S_DGR_FWD_DISP_ALV> TYPE /ACCGO/S_DGR_FWD_DISP_ALV.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_/ACCGO/S_DGR_FWD_DISP_ALV.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /ACCGO/S_DGR_FWD_DISP_ALV
  INTO TABLE IT_/ACCGO/S_DGR_FWD_DISP_ALV.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /ACCGO/S_DGR_FWD_DISP_ALV
*  INTO TABLE @DATA(IT_/ACCGO/S_DGR_FWD_DISP_ALV2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_/ACCGO/S_DGR_FWD_DISP_ALV INDEX 1 INTO DATA(WA_/ACCGO/S_DGR_FWD_DISP_ALV2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/ACCGO/S_DGR_FWD_DISP_ALV ASSIGNING </ACCGO/S_DGR_FWD_DISP_ALV>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</ACCGO/S_DGR_FWD_DISP_ALV>-HLR_EVENT_ID = 1.
</ACCGO/S_DGR_FWD_DISP_ALV>-S_PLANT = 1.
</ACCGO/S_DGR_FWD_DISP_ALV>-D_PLANT = 1.
</ACCGO/S_DGR_FWD_DISP_ALV>-S_TSW_LOC = 1.
</ACCGO/S_DGR_FWD_DISP_ALV>-D_TSW_LOC = 1.

ENDLOOP.

LOOP AT IT_/ACCGO/S_DGR_FWD_DISP_ALV INTO WA_/ACCGO/S_DGR_FWD_DISP_ALV.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/ACCGO/S_DGR_FWD_DISP_ALV-MATERIAL, sy-vline,
  WA_/ACCGO/S_DGR_FWD_DISP_ALV-COMMODITY, sy-vline,
  WA_/ACCGO/S_DGR_FWD_DISP_ALV-EXECUTED_BY, sy-vline,
  WA_/ACCGO/S_DGR_FWD_DISP_ALV-EXECUTED_ON, sy-vline,
  WA_/ACCGO/S_DGR_FWD_DISP_ALV-S_GROSS_QUAN, sy-vline,
  WA_/ACCGO/S_DGR_FWD_DISP_ALV-S_GR_UOM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/ACCGO/S_DGR_FWD_DISP_ALV you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_/ACCGO/S_DGR_FWD_DISP_ALV TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_/ACCGO/S_DGR_FWD_DISP_ALV INTO WA_/ACCGO/S_DGR_FWD_DISP_ALV.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_/ACCGO/S_DGR_FWD_DISP_ALV-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ACCGO/S_DGR_FWD_DISP_ALV-MATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field S_GR_UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/ACCGO/S_DGR_FWD_DISP_ALV-S_GR_UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ACCGO/S_DGR_FWD_DISP_ALV-S_GR_UOM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field S_NT_UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/ACCGO/S_DGR_FWD_DISP_ALV-S_NT_UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ACCGO/S_DGR_FWD_DISP_ALV-S_NT_UOM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field D_GR_UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/ACCGO/S_DGR_FWD_DISP_ALV-D_GR_UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ACCGO/S_DGR_FWD_DISP_ALV-D_GR_UOM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field D_NT_UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/ACCGO/S_DGR_FWD_DISP_ALV-D_NT_UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ACCGO/S_DGR_FWD_DISP_ALV-D_NT_UOM.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_/ACCGO/S_DGR_FWD_DISP_ALV_STR, 
HLR_EVENT_ID TYPE STRING,
S_PLANT TYPE STRING,
D_PLANT TYPE STRING,
S_TSW_LOC TYPE STRING,
D_TSW_LOC TYPE STRING,
MATERIAL TYPE STRING,
COMMODITY TYPE STRING,
EXECUTED_BY TYPE STRING,
EXECUTED_ON TYPE STRING,
S_GROSS_QUAN TYPE STRING,
S_GR_UOM TYPE STRING,
S_NET_QUAN TYPE STRING,
S_NT_UOM TYPE STRING,
D_GROSS_QUAN TYPE STRING,
D_GR_UOM TYPE STRING,
D_NET_QUAN TYPE STRING,
D_NT_UOM TYPE STRING,
VALID_FROM_D TYPE STRING,
VALID_FROM_T TYPE STRING,
VALID_TO_D TYPE STRING,
VALID_TO_T TYPE STRING,
CHANGED_BY TYPE STRING,
CHANGED_ON TYPE STRING,
VALID_FROM TYPE STRING,
VALID_TO TYPE STRING,
RECIEPT_FWD TYPE STRING,
CANCELLED_FWD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR-HLR_EVENT_ID sy-vline 
WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR-S_PLANT sy-vline 
WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR-D_PLANT sy-vline 
WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR-S_TSW_LOC sy-vline 
WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR-D_TSW_LOC sy-vline 
WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR-MATERIAL sy-vline 
WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR-COMMODITY sy-vline 
WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR-EXECUTED_BY sy-vline 
WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR-EXECUTED_ON sy-vline 
WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR-S_GROSS_QUAN sy-vline 
WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR-S_GR_UOM sy-vline 
WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR-S_NET_QUAN sy-vline 
WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR-S_NT_UOM sy-vline 
WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR-D_GROSS_QUAN sy-vline 
WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR-D_GR_UOM sy-vline 
WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR-D_NET_QUAN sy-vline 
WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR-D_NT_UOM sy-vline 
WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR-VALID_FROM_D sy-vline 
WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR-VALID_FROM_T sy-vline 
WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR-VALID_TO_D sy-vline 
WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR-VALID_TO_T sy-vline 
WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR-CHANGED_BY sy-vline 
WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR-CHANGED_ON sy-vline 
WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR-VALID_FROM sy-vline 
WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR-VALID_TO sy-vline 
WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR-RECIEPT_FWD sy-vline 
WA_/ACCGO/S_DGR_FWD_DISP_ALV_STR-CANCELLED_FWD sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.