ABAP Select data from SAP table RFVZZKOPO_ALV into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RFVZZKOPO_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 RFVZZKOPO_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 RFVZZKOPO_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_RFVZZKOPO_ALV TYPE STANDARD TABLE OF RFVZZKOPO_ALV,
      WA_RFVZZKOPO_ALV TYPE RFVZZKOPO_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: <RFVZZKOPO_ALV> TYPE RFVZZKOPO_ALV.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RFVZZKOPO_ALV
  INTO TABLE IT_RFVZZKOPO_ALV.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFVZZKOPO_ALV
*  INTO TABLE @DATA(IT_RFVZZKOPO_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_RFVZZKOPO_ALV INDEX 1 INTO DATA(WA_RFVZZKOPO_ALV2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RFVZZKOPO_ALV ASSIGNING <RFVZZKOPO_ALV>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFVZZKOPO_ALV>-BUKRS = 1.
<RFVZZKOPO_ALV>-RKEY1 = 1.
<RFVZZKOPO_ALV>-SKOART = 1.
<RFVZZKOPO_ALV>-DGUEL_KP = 1.
<RFVZZKOPO_ALV>-BKOND = 1.

ENDLOOP.

LOOP AT IT_RFVZZKOPO_ALV INTO WA_RFVZZKOPO_ALV.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFVZZKOPO_ALV-SWHRKOND, sy-vline,
  WA_RFVZZKOPO_ALV-AMMRHY, sy-vline,
  WA_RFVZZKOPO_ALV-ATTRHY, sy-vline,
  WA_RFVZZKOPO_ALV-SZAWS, sy-vline,
  WA_RFVZZKOPO_ALV-MWSKZ, sy-vline,
  WA_RFVZZKOPO_ALV-JBMONAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFVZZKOPO_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_RFVZZKOPO_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_RFVZZKOPO_ALV INTO WA_RFVZZKOPO_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 ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFVZZKOPO_ALV-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFVZZKOPO_ALV-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SPARTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFVZZKOPO_ALV-SPARTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFVZZKOPO_ALV-SPARTNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFVZZKOPO_ALV-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFVZZKOPO_ALV-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFVZZKOPO_ALV-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFVZZKOPO_ALV-KOSTL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RECNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFVZZKOPO_ALV-RECNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFVZZKOPO_ALV-RECNNR.
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_RFVZZKOPO_ALV_STR, 
BUKRS TYPE STRING,
RKEY1 TYPE STRING,
SKOART TYPE STRING,
DGUEL_KP TYPE STRING,
BKOND TYPE STRING,
SWHRKOND TYPE STRING,
AMMRHY TYPE STRING,
ATTRHY TYPE STRING,
SZAWS TYPE STRING,
MWSKZ TYPE STRING,
JBMONAT TYPE STRING,
DFAELL TYPE STRING,
KUNNR TYPE STRING,
ZLSCH TYPE STRING,
SPARTNR TYPE STRING,
SFKALRI TYPE STRING,
DALLGEM TYPE STRING,
BKONDQM TYPE STRING,
JAREA TYPE STRING,
SFLART TYPE STRING,
TXJCD TYPE STRING,
LIFNR TYPE STRING,
KOSTL TYPE STRING,
GFZLSCH TYPE STRING,
ZLSPR TYPE STRING,
XKOARTM TYPE STRING,
RECNNR TYPE STRING,
ZLSCHTEXT TYPE STRING,
GFZLSCHTEXT TYPE STRING,
KUNNRLIFNRTEXT TYPE STRING,
BKONDNET TYPE STRING,
BKONDGROSS TYPE STRING,
BMWST TYPE STRING,
XCROSS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFVZZKOPO_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_RFVZZKOPO_ALV_STR-BUKRS sy-vline 
WA_RFVZZKOPO_ALV_STR-RKEY1 sy-vline 
WA_RFVZZKOPO_ALV_STR-SKOART sy-vline 
WA_RFVZZKOPO_ALV_STR-DGUEL_KP sy-vline 
WA_RFVZZKOPO_ALV_STR-BKOND sy-vline 
WA_RFVZZKOPO_ALV_STR-SWHRKOND sy-vline 
WA_RFVZZKOPO_ALV_STR-AMMRHY sy-vline 
WA_RFVZZKOPO_ALV_STR-ATTRHY sy-vline 
WA_RFVZZKOPO_ALV_STR-SZAWS sy-vline 
WA_RFVZZKOPO_ALV_STR-MWSKZ sy-vline 
WA_RFVZZKOPO_ALV_STR-JBMONAT sy-vline 
WA_RFVZZKOPO_ALV_STR-DFAELL sy-vline 
WA_RFVZZKOPO_ALV_STR-KUNNR sy-vline 
WA_RFVZZKOPO_ALV_STR-ZLSCH sy-vline 
WA_RFVZZKOPO_ALV_STR-SPARTNR sy-vline 
WA_RFVZZKOPO_ALV_STR-SFKALRI sy-vline 
WA_RFVZZKOPO_ALV_STR-DALLGEM sy-vline 
WA_RFVZZKOPO_ALV_STR-BKONDQM sy-vline 
WA_RFVZZKOPO_ALV_STR-JAREA sy-vline 
WA_RFVZZKOPO_ALV_STR-SFLART sy-vline 
WA_RFVZZKOPO_ALV_STR-TXJCD sy-vline 
WA_RFVZZKOPO_ALV_STR-LIFNR sy-vline 
WA_RFVZZKOPO_ALV_STR-KOSTL sy-vline 
WA_RFVZZKOPO_ALV_STR-GFZLSCH sy-vline 
WA_RFVZZKOPO_ALV_STR-ZLSPR sy-vline 
WA_RFVZZKOPO_ALV_STR-XKOARTM sy-vline 
WA_RFVZZKOPO_ALV_STR-RECNNR sy-vline 
WA_RFVZZKOPO_ALV_STR-ZLSCHTEXT sy-vline 
WA_RFVZZKOPO_ALV_STR-GFZLSCHTEXT sy-vline 
WA_RFVZZKOPO_ALV_STR-KUNNRLIFNRTEXT sy-vline 
WA_RFVZZKOPO_ALV_STR-BKONDNET sy-vline 
WA_RFVZZKOPO_ALV_STR-BKONDGROSS sy-vline 
WA_RFVZZKOPO_ALV_STR-BMWST sy-vline 
WA_RFVZZKOPO_ALV_STR-XCROSS sy-vline      INTO ld_text SEPARATED BY SPACE.

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