ABAP Select data from SAP table FKKWO_PROT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FKKWO_PROT 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 FKKWO_PROT. 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 FKKWO_PROT 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_FKKWO_PROT TYPE STANDARD TABLE OF FKKWO_PROT,
      WA_FKKWO_PROT TYPE FKKWO_PROT,
      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: <FKKWO_PROT> TYPE FKKWO_PROT.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKWO_PROT
*  INTO TABLE @DATA(IT_FKKWO_PROT2).
*--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_FKKWO_PROT INDEX 1 INTO DATA(WA_FKKWO_PROT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKWO_PROT>-LAUFD = 1.
<FKKWO_PROT>-LAUFI = 1.
<FKKWO_PROT>-ABBEL = 1.
<FKKWO_PROT>-OPBEL = 1.
<FKKWO_PROT>-OPUPW = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKWO_PROT-OPUPK, sy-vline,
  WA_FKKWO_PROT-OPUPZ, sy-vline,
  WA_FKKWO_PROT-LFDNR, sy-vline,
  WA_FKKWO_PROT-XSIMU, sy-vline,
  WA_FKKWO_PROT-GPART, sy-vline,
  WA_FKKWO_PROT-VKONT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKWO_PROT 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_FKKWO_PROT 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_FKKWO_PROT INTO WA_FKKWO_PROT.


*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 ABBEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKWO_PROT-ABBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKWO_PROT-ABBEL.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field SEGMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKWO_PROT-SEGMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKWO_PROT-SEGMENT.
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_FKKWO_PROT_STR, 
LAUFD TYPE STRING,
LAUFI TYPE STRING,
ABBEL TYPE STRING,
OPBEL TYPE STRING,
OPUPW TYPE STRING,
OPUPK TYPE STRING,
OPUPZ TYPE STRING,
LFDNR TYPE STRING,
XSIMU TYPE STRING,
GPART TYPE STRING,
VKONT TYPE STRING,
VTREF TYPE STRING,
BUKRS TYPE STRING,
MWSKZ TYPE STRING,
WAERS TYPE STRING,
BETRW TYPE STRING,
HKONT TYPE STRING,
MWSZKZ TYPE STRING,
SEGMENT TYPE STRING,
STAKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKWO_PROT_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_FKKWO_PROT_STR-LAUFD sy-vline 
WA_FKKWO_PROT_STR-LAUFI sy-vline 
WA_FKKWO_PROT_STR-ABBEL sy-vline 
WA_FKKWO_PROT_STR-OPBEL sy-vline 
WA_FKKWO_PROT_STR-OPUPW sy-vline 
WA_FKKWO_PROT_STR-OPUPK sy-vline 
WA_FKKWO_PROT_STR-OPUPZ sy-vline 
WA_FKKWO_PROT_STR-LFDNR sy-vline 
WA_FKKWO_PROT_STR-XSIMU sy-vline 
WA_FKKWO_PROT_STR-GPART sy-vline 
WA_FKKWO_PROT_STR-VKONT sy-vline 
WA_FKKWO_PROT_STR-VTREF sy-vline 
WA_FKKWO_PROT_STR-BUKRS sy-vline 
WA_FKKWO_PROT_STR-MWSKZ sy-vline 
WA_FKKWO_PROT_STR-WAERS sy-vline 
WA_FKKWO_PROT_STR-BETRW sy-vline 
WA_FKKWO_PROT_STR-HKONT sy-vline 
WA_FKKWO_PROT_STR-MWSZKZ sy-vline 
WA_FKKWO_PROT_STR-SEGMENT sy-vline 
WA_FKKWO_PROT_STR-STAKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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