ABAP Select data from SAP table /ACCGO/S_PPMG_ALV_DISPLAY 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_PPMG_ALV_DISPLAY 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_PPMG_ALV_DISPLAY. 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_PPMG_ALV_DISPLAY 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_PPMG_ALV_DISPLAY TYPE STANDARD TABLE OF /ACCGO/S_PPMG_ALV_DISPLAY,
      WA_/ACCGO/S_PPMG_ALV_DISPLAY TYPE /ACCGO/S_PPMG_ALV_DISPLAY,
      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_PPMG_ALV_DISPLAY> TYPE /ACCGO/S_PPMG_ALV_DISPLAY.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /ACCGO/S_PPMG_ALV_DISPLAY
*  INTO TABLE @DATA(IT_/ACCGO/S_PPMG_ALV_DISPLAY2).
*--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_PPMG_ALV_DISPLAY INDEX 1 INTO DATA(WA_/ACCGO/S_PPMG_ALV_DISPLAY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</ACCGO/S_PPMG_ALV_DISPLAY>-PREPAYMENTAGREEMENT = 1.
</ACCGO/S_PPMG_ALV_DISPLAY>-PREPAYMENTAGREEMENTTYPE = 1.
</ACCGO/S_PPMG_ALV_DISPLAY>-PREPAYMENTAGREEMENTCATEGORY = 1.
</ACCGO/S_PPMG_ALV_DISPLAY>-PREPAYMENTAGREEMNTCATEGORYTEXT = 1.
</ACCGO/S_PPMG_ALV_DISPLAY>-DOCNUMBER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/ACCGO/S_PPMG_ALV_DISPLAY-DOCUMENTITEMNUMBER, sy-vline,
  WA_/ACCGO/S_PPMG_ALV_DISPLAY-PREPAYMENTAGREEMENTSTATUS, sy-vline,
  WA_/ACCGO/S_PPMG_ALV_DISPLAY-PPMT_STATUS_TEXT, sy-vline,
  WA_/ACCGO/S_PPMG_ALV_DISPLAY-PREPAYMENTAMOUNT, sy-vline,
  WA_/ACCGO/S_PPMG_ALV_DISPLAY-PPMG_OPEN_AMOUNT, sy-vline,
  WA_/ACCGO/S_PPMG_ALV_DISPLAY-PPMG_INTEREST_AMOUNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/ACCGO/S_PPMG_ALV_DISPLAY 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_PPMG_ALV_DISPLAY 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_PPMG_ALV_DISPLAY INTO WA_/ACCGO/S_PPMG_ALV_DISPLAY.


*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 ALPHA, internal->external for field DOCNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/ACCGO/S_PPMG_ALV_DISPLAY-DOCNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ACCGO/S_PPMG_ALV_DISPLAY-DOCNUMBER.
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_PPMG_ALV_DISPLAY_STR, 
PREPAYMENTAGREEMENT TYPE STRING,
PREPAYMENTAGREEMENTTYPE TYPE STRING,
PREPAYMENTAGREEMENTCATEGORY TYPE STRING,
PREPAYMENTAGREEMNTCATEGORYTEXT TYPE STRING,
DOCNUMBER TYPE STRING,
DOCUMENTITEMNUMBER TYPE STRING,
PREPAYMENTAGREEMENTSTATUS TYPE STRING,
PPMT_STATUS_TEXT TYPE STRING,
PREPAYMENTAMOUNT TYPE STRING,
PPMG_OPEN_AMOUNT TYPE STRING,
PPMG_INTEREST_AMOUNT TYPE STRING,
CURRENCY TYPE STRING,
PAYOUT_PER TYPE STRING,
COLL_REQ TYPE STRING,
COLL_RCVD TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/ACCGO/S_PPMG_ALV_DISPLAY_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_PPMG_ALV_DISPLAY_STR-PREPAYMENTAGREEMENT sy-vline 
WA_/ACCGO/S_PPMG_ALV_DISPLAY_STR-PREPAYMENTAGREEMENTTYPE sy-vline 
WA_/ACCGO/S_PPMG_ALV_DISPLAY_STR-PREPAYMENTAGREEMENTCATEGORY sy-vline 
WA_/ACCGO/S_PPMG_ALV_DISPLAY_STR-PREPAYMENTAGREEMNTCATEGORYTEXT sy-vline 
WA_/ACCGO/S_PPMG_ALV_DISPLAY_STR-DOCNUMBER sy-vline 
WA_/ACCGO/S_PPMG_ALV_DISPLAY_STR-DOCUMENTITEMNUMBER sy-vline 
WA_/ACCGO/S_PPMG_ALV_DISPLAY_STR-PREPAYMENTAGREEMENTSTATUS sy-vline 
WA_/ACCGO/S_PPMG_ALV_DISPLAY_STR-PPMT_STATUS_TEXT sy-vline 
WA_/ACCGO/S_PPMG_ALV_DISPLAY_STR-PREPAYMENTAMOUNT sy-vline 
WA_/ACCGO/S_PPMG_ALV_DISPLAY_STR-PPMG_OPEN_AMOUNT sy-vline 
WA_/ACCGO/S_PPMG_ALV_DISPLAY_STR-PPMG_INTEREST_AMOUNT sy-vline 
WA_/ACCGO/S_PPMG_ALV_DISPLAY_STR-CURRENCY sy-vline 
WA_/ACCGO/S_PPMG_ALV_DISPLAY_STR-PAYOUT_PER sy-vline 
WA_/ACCGO/S_PPMG_ALV_DISPLAY_STR-COLL_REQ sy-vline 
WA_/ACCGO/S_PPMG_ALV_DISPLAY_STR-COLL_RCVD sy-vline 
WA_/ACCGO/S_PPMG_ALV_DISPLAY_STR-ERNAM sy-vline 
WA_/ACCGO/S_PPMG_ALV_DISPLAY_STR-ERDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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