ABAP Select data from SAP table KKBCZ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KKBCZ
*  INTO TABLE @DATA(IT_KKBCZ2).
*--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_KKBCZ INDEX 1 INTO DATA(WA_KKBCZ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KKBCZ>-WOF000 = 1.
<KKBCZ>-WOF001 = 1.
<KKBCZ>-WOF002 = 1.
<KKBCZ>-WOF003 = 1.
<KKBCZ>-WOF004 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KKBCZ-WOF005, sy-vline,
  WA_KKBCZ-WOF006, sy-vline,
  WA_KKBCZ-WOF007, sy-vline,
  WA_KKBCZ-WOF008, sy-vline,
  WA_KKBCZ-WOF009, sy-vline,
  WA_KKBCZ-WOF010, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KKBCZ 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_KKBCZ 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_KKBCZ INTO WA_KKBCZ.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_KKBCZ_STR, 
WOF000 TYPE STRING,
WOF001 TYPE STRING,
WOF002 TYPE STRING,
WOF003 TYPE STRING,
WOF004 TYPE STRING,
WOF005 TYPE STRING,
WOF006 TYPE STRING,
WOF007 TYPE STRING,
WOF008 TYPE STRING,
WOF009 TYPE STRING,
WOF010 TYPE STRING,
WOF011 TYPE STRING,
WOF012 TYPE STRING,
WOF013 TYPE STRING,
WOF014 TYPE STRING,
WOF015 TYPE STRING,
WOF016 TYPE STRING,
WKU000 TYPE STRING,
WKU001 TYPE STRING,
WKU002 TYPE STRING,
WKU003 TYPE STRING,
WKU004 TYPE STRING,
WKU005 TYPE STRING,
WKU006 TYPE STRING,
WKU007 TYPE STRING,
WKU008 TYPE STRING,
WKU009 TYPE STRING,
WKU010 TYPE STRING,
WKU011 TYPE STRING,
WKU012 TYPE STRING,
WKU013 TYPE STRING,
WKU014 TYPE STRING,
WKU015 TYPE STRING,
WKU016 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KKBCZ_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_KKBCZ_STR-WOF000 sy-vline 
WA_KKBCZ_STR-WOF001 sy-vline 
WA_KKBCZ_STR-WOF002 sy-vline 
WA_KKBCZ_STR-WOF003 sy-vline 
WA_KKBCZ_STR-WOF004 sy-vline 
WA_KKBCZ_STR-WOF005 sy-vline 
WA_KKBCZ_STR-WOF006 sy-vline 
WA_KKBCZ_STR-WOF007 sy-vline 
WA_KKBCZ_STR-WOF008 sy-vline 
WA_KKBCZ_STR-WOF009 sy-vline 
WA_KKBCZ_STR-WOF010 sy-vline 
WA_KKBCZ_STR-WOF011 sy-vline 
WA_KKBCZ_STR-WOF012 sy-vline 
WA_KKBCZ_STR-WOF013 sy-vline 
WA_KKBCZ_STR-WOF014 sy-vline 
WA_KKBCZ_STR-WOF015 sy-vline 
WA_KKBCZ_STR-WOF016 sy-vline 
WA_KKBCZ_STR-WKU000 sy-vline 
WA_KKBCZ_STR-WKU001 sy-vline 
WA_KKBCZ_STR-WKU002 sy-vline 
WA_KKBCZ_STR-WKU003 sy-vline 
WA_KKBCZ_STR-WKU004 sy-vline 
WA_KKBCZ_STR-WKU005 sy-vline 
WA_KKBCZ_STR-WKU006 sy-vline 
WA_KKBCZ_STR-WKU007 sy-vline 
WA_KKBCZ_STR-WKU008 sy-vline 
WA_KKBCZ_STR-WKU009 sy-vline 
WA_KKBCZ_STR-WKU010 sy-vline 
WA_KKBCZ_STR-WKU011 sy-vline 
WA_KKBCZ_STR-WKU012 sy-vline 
WA_KKBCZ_STR-WKU013 sy-vline 
WA_KKBCZ_STR-WKU014 sy-vline 
WA_KKBCZ_STR-WKU015 sy-vline 
WA_KKBCZ_STR-WKU016 sy-vline      INTO ld_text SEPARATED BY SPACE.

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