ABAP Select data from SAP table KLATTRIB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KLATTRIB
*  INTO TABLE @DATA(IT_KLATTRIB2).
*--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_KLATTRIB INDEX 1 INTO DATA(WA_KLATTRIB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KLATTRIB>-BUKRS = 1.
<KLATTRIB>-PARTNR = 1.
<KLATTRIB>-SLPG = 1.
<KLATTRIB>-RPORTB = 1.
<KLATTRIB>-RDEALER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KLATTRIB-WAERS, sy-vline,
  WA_KLATTRIB-CONTROL01, sy-vline,
  WA_KLATTRIB-INTORG, sy-vline,
  WA_KLATTRIB-RCOUNTRY, sy-vline,
  WA_KLATTRIB-COUNTRY, sy-vline,
  WA_KLATTRIB-SECTOR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KLATTRIB 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_KLATTRIB 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_KLATTRIB INTO WA_KLATTRIB.


*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 PARTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KLATTRIB-PARTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KLATTRIB-PARTNR.
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_KLATTRIB_STR, 
BUKRS TYPE STRING,
PARTNR TYPE STRING,
SLPG TYPE STRING,
RPORTB TYPE STRING,
RDEALER TYPE STRING,
WAERS TYPE STRING,
CONTROL01 TYPE STRING,
INTORG TYPE STRING,
RCOUNTRY TYPE STRING,
COUNTRY TYPE STRING,
SECTOR TYPE STRING,
RATING TYPE STRING,
CRATING TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KLATTRIB_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_KLATTRIB_STR-BUKRS sy-vline 
WA_KLATTRIB_STR-PARTNR sy-vline 
WA_KLATTRIB_STR-SLPG sy-vline 
WA_KLATTRIB_STR-RPORTB sy-vline 
WA_KLATTRIB_STR-RDEALER sy-vline 
WA_KLATTRIB_STR-WAERS sy-vline 
WA_KLATTRIB_STR-CONTROL01 sy-vline 
WA_KLATTRIB_STR-INTORG sy-vline 
WA_KLATTRIB_STR-RCOUNTRY sy-vline 
WA_KLATTRIB_STR-COUNTRY sy-vline 
WA_KLATTRIB_STR-SECTOR sy-vline 
WA_KLATTRIB_STR-RATING sy-vline 
WA_KLATTRIB_STR-CRATING sy-vline      INTO ld_text SEPARATED BY SPACE.

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