ABAP Select data from SAP table FKKOP_CHGF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKOP_CHGF
*  INTO TABLE @DATA(IT_FKKOP_CHGF2).
*--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_FKKOP_CHGF INDEX 1 INTO DATA(WA_FKKOP_CHGF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKOP_CHGF>-FAEDN = 1.
<FKKOP_CHGF>-FAEDS = 1.
<FKKOP_CHGF>-STUDT = 1.
<FKKOP_CHGF>-EMGPA = 1.
<FKKOP_CHGF>-EMBVT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKOP_CHGF-EMCRD, sy-vline,
  WA_FKKOP_CHGF-EMADR, sy-vline,
  WA_FKKOP_CHGF-OPTXT, sy-vline,
  WA_FKKOP_CHGF-XMANL, sy-vline,
  WA_FKKOP_CHGF-MAHNV, sy-vline,
  WA_FKKOP_CHGF-IKEY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKOP_CHGF 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_FKKOP_CHGF 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_FKKOP_CHGF INTO WA_FKKOP_CHGF.


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

*Conversion exit ALPHA, internal->external for field EMADR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKOP_CHGF-EMADR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKOP_CHGF-EMADR.
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_FKKOP_CHGF_STR, 
FAEDN TYPE STRING,
FAEDS TYPE STRING,
STUDT TYPE STRING,
EMGPA TYPE STRING,
EMBVT TYPE STRING,
EMCRD TYPE STRING,
EMADR TYPE STRING,
OPTXT TYPE STRING,
XMANL TYPE STRING,
MAHNV TYPE STRING,
IKEY TYPE STRING,
PYMET TYPE STRING,
PYGRP TYPE STRING,
SKTPZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKOP_CHGF_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_FKKOP_CHGF_STR-FAEDN sy-vline 
WA_FKKOP_CHGF_STR-FAEDS sy-vline 
WA_FKKOP_CHGF_STR-STUDT sy-vline 
WA_FKKOP_CHGF_STR-EMGPA sy-vline 
WA_FKKOP_CHGF_STR-EMBVT sy-vline 
WA_FKKOP_CHGF_STR-EMCRD sy-vline 
WA_FKKOP_CHGF_STR-EMADR sy-vline 
WA_FKKOP_CHGF_STR-OPTXT sy-vline 
WA_FKKOP_CHGF_STR-XMANL sy-vline 
WA_FKKOP_CHGF_STR-MAHNV sy-vline 
WA_FKKOP_CHGF_STR-IKEY sy-vline 
WA_FKKOP_CHGF_STR-PYMET sy-vline 
WA_FKKOP_CHGF_STR-PYGRP sy-vline 
WA_FKKOP_CHGF_STR-SKTPZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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