ABAP Select data from SAP table KCD_ALL_TYPES_BIG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KCD_ALL_TYPES_BIG
*  INTO TABLE @DATA(IT_KCD_ALL_TYPES_BIG2).
*--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_KCD_ALL_TYPES_BIG INDEX 1 INTO DATA(WA_KCD_ALL_TYPES_BIG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KCD_ALL_TYPES_BIG>-FACCP = 1.
<KCD_ALL_TYPES_BIG>-FCHAR1 = 1.
<KCD_ALL_TYPES_BIG>-FCHAR10 = 1.
<KCD_ALL_TYPES_BIG>-FCUKY1 = 1.
<KCD_ALL_TYPES_BIG>-FCUKY2 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KCD_ALL_TYPES_BIG-FCURR1, sy-vline,
  WA_KCD_ALL_TYPES_BIG-FCURR2, sy-vline,
  WA_KCD_ALL_TYPES_BIG-FCLNT, sy-vline,
  WA_KCD_ALL_TYPES_BIG-FDATS, sy-vline,
  WA_KCD_ALL_TYPES_BIG-FINT1, sy-vline,
  WA_KCD_ALL_TYPES_BIG-FINT2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KCD_ALL_TYPES_BIG 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_KCD_ALL_TYPES_BIG 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_KCD_ALL_TYPES_BIG INTO WA_KCD_ALL_TYPES_BIG.


*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 ISOLA, internal->external for field FLANG
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_KCD_ALL_TYPES_BIG-FLANG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KCD_ALL_TYPES_BIG-FLANG.
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_KCD_ALL_TYPES_BIG_STR, 
FACCP TYPE STRING,
FCHAR1 TYPE STRING,
FCHAR10 TYPE STRING,
FCUKY1 TYPE STRING,
FCUKY2 TYPE STRING,
FCURR1 TYPE STRING,
FCURR2 TYPE STRING,
FCLNT TYPE STRING,
FDATS TYPE STRING,
FINT1 TYPE STRING,
FINT2 TYPE STRING,
FINT4 TYPE STRING,
FLANG TYPE STRING,
FNUMC1 TYPE STRING,
FNUMC5 TYPE STRING,
FTIMS TYPE STRING,
FQUAN TYPE STRING,
FUNIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KCD_ALL_TYPES_BIG_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_KCD_ALL_TYPES_BIG_STR-FACCP sy-vline 
WA_KCD_ALL_TYPES_BIG_STR-FCHAR1 sy-vline 
WA_KCD_ALL_TYPES_BIG_STR-FCHAR10 sy-vline 
WA_KCD_ALL_TYPES_BIG_STR-FCUKY1 sy-vline 
WA_KCD_ALL_TYPES_BIG_STR-FCUKY2 sy-vline 
WA_KCD_ALL_TYPES_BIG_STR-FCURR1 sy-vline 
WA_KCD_ALL_TYPES_BIG_STR-FCURR2 sy-vline 
WA_KCD_ALL_TYPES_BIG_STR-FCLNT sy-vline 
WA_KCD_ALL_TYPES_BIG_STR-FDATS sy-vline 
WA_KCD_ALL_TYPES_BIG_STR-FINT1 sy-vline 
WA_KCD_ALL_TYPES_BIG_STR-FINT2 sy-vline 
WA_KCD_ALL_TYPES_BIG_STR-FINT4 sy-vline 
WA_KCD_ALL_TYPES_BIG_STR-FLANG sy-vline 
WA_KCD_ALL_TYPES_BIG_STR-FNUMC1 sy-vline 
WA_KCD_ALL_TYPES_BIG_STR-FNUMC5 sy-vline 
WA_KCD_ALL_TYPES_BIG_STR-FTIMS sy-vline 
WA_KCD_ALL_TYPES_BIG_STR-FQUAN sy-vline 
WA_KCD_ALL_TYPES_BIG_STR-FUNIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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