ABAP Select data from SAP table FKKOP_CHG into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FKKOP_CHG 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_CHG. 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_CHG 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_CHG TYPE STANDARD TABLE OF FKKOP_CHG,
      WA_FKKOP_CHG TYPE FKKOP_CHG,
      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_CHG> TYPE FKKOP_CHG.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKOP_CHG
*  INTO TABLE @DATA(IT_FKKOP_CHG2).
*--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_CHG INDEX 1 INTO DATA(WA_FKKOP_CHG2).


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

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

ENDLOOP.

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

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


*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_CHG-EMGPA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKOP_CHG-EMGPA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EMADR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKOP_CHG-EMADR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKOP_CHG-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_CHG_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,
SPZA1 TYPE STRING,
FD1ZA TYPE STRING,
TD1ZA TYPE STRING,
SPZA2 TYPE STRING,
FD2ZA TYPE STRING,
TD2ZA TYPE STRING,
MNSP1 TYPE STRING,
FD1MA TYPE STRING,
TD1MA TYPE STRING,
MNSP2 TYPE STRING,
FD2MA TYPE STRING,
TD2MA TYPE STRING,
SPRZ1 TYPE STRING,
FD1ZI TYPE STRING,
TD1ZI TYPE STRING,
SPRZ2 TYPE STRING,
FD2ZI TYPE STRING,
TD2ZI TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKOP_CHG_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_CHG_STR-FAEDN sy-vline 
WA_FKKOP_CHG_STR-FAEDS sy-vline 
WA_FKKOP_CHG_STR-STUDT sy-vline 
WA_FKKOP_CHG_STR-EMGPA sy-vline 
WA_FKKOP_CHG_STR-EMBVT sy-vline 
WA_FKKOP_CHG_STR-EMCRD sy-vline 
WA_FKKOP_CHG_STR-EMADR sy-vline 
WA_FKKOP_CHG_STR-OPTXT sy-vline 
WA_FKKOP_CHG_STR-XMANL sy-vline 
WA_FKKOP_CHG_STR-MAHNV sy-vline 
WA_FKKOP_CHG_STR-IKEY sy-vline 
WA_FKKOP_CHG_STR-PYMET sy-vline 
WA_FKKOP_CHG_STR-PYGRP sy-vline 
WA_FKKOP_CHG_STR-SKTPZ sy-vline 
WA_FKKOP_CHG_STR-SPZA1 sy-vline 
WA_FKKOP_CHG_STR-FD1ZA sy-vline 
WA_FKKOP_CHG_STR-TD1ZA sy-vline 
WA_FKKOP_CHG_STR-SPZA2 sy-vline 
WA_FKKOP_CHG_STR-FD2ZA sy-vline 
WA_FKKOP_CHG_STR-TD2ZA sy-vline 
WA_FKKOP_CHG_STR-MNSP1 sy-vline 
WA_FKKOP_CHG_STR-FD1MA sy-vline 
WA_FKKOP_CHG_STR-TD1MA sy-vline 
WA_FKKOP_CHG_STR-MNSP2 sy-vline 
WA_FKKOP_CHG_STR-FD2MA sy-vline 
WA_FKKOP_CHG_STR-TD2MA sy-vline 
WA_FKKOP_CHG_STR-SPRZ1 sy-vline 
WA_FKKOP_CHG_STR-FD1ZI sy-vline 
WA_FKKOP_CHG_STR-TD1ZI sy-vline 
WA_FKKOP_CHG_STR-SPRZ2 sy-vline 
WA_FKKOP_CHG_STR-FD2ZI sy-vline 
WA_FKKOP_CHG_STR-TD2ZI sy-vline      INTO ld_text SEPARATED BY SPACE.

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