ABAP Select data from SAP table KBS1_ALV_SELECTION_FIELDS into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP KBS1_ALV_SELECTION_FIELDS 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 KBS1_ALV_SELECTION_FIELDS. 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 KBS1_ALV_SELECTION_FIELDS 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_KBS1_ALV_SELECTION_FIELDS TYPE STANDARD TABLE OF KBS1_ALV_SELECTION_FIELDS,
      WA_KBS1_ALV_SELECTION_FIELDS TYPE KBS1_ALV_SELECTION_FIELDS,
      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: <KBS1_ALV_SELECTION_FIELDS> TYPE KBS1_ALV_SELECTION_FIELDS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_KBS1_ALV_SELECTION_FIELDS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM KBS1_ALV_SELECTION_FIELDS
  INTO TABLE IT_KBS1_ALV_SELECTION_FIELDS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KBS1_ALV_SELECTION_FIELDS
*  INTO TABLE @DATA(IT_KBS1_ALV_SELECTION_FIELDS2).
*--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_KBS1_ALV_SELECTION_FIELDS INDEX 1 INTO DATA(WA_KBS1_ALV_SELECTION_FIELDS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KBS1_ALV_SELECTION_FIELDS ASSIGNING <KBS1_ALV_SELECTION_FIELDS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KBS1_ALV_SELECTION_FIELDS>-BOX = 1.
<KBS1_ALV_SELECTION_FIELDS>-KOKRS = 1.
<KBS1_ALV_SELECTION_FIELDS>-EXTNR = 1.
<KBS1_ALV_SELECTION_FIELDS>-KSTAR = 1.
<KBS1_ALV_SELECTION_FIELDS>-BUKRS = 1.

ENDLOOP.

LOOP AT IT_KBS1_ALV_SELECTION_FIELDS INTO WA_KBS1_ALV_SELECTION_FIELDS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KBS1_ALV_SELECTION_FIELDS-WERKS, sy-vline,
  WA_KBS1_ALV_SELECTION_FIELDS-PRCTR, sy-vline,
  WA_KBS1_ALV_SELECTION_FIELDS-ESORT, sy-vline,
  WA_KBS1_ALV_SELECTION_FIELDS-ERFNM, sy-vline,
  WA_KBS1_ALV_SELECTION_FIELDS-ERFDT, sy-vline,
  WA_KBS1_ALV_SELECTION_FIELDS-AENDT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KBS1_ALV_SELECTION_FIELDS 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_KBS1_ALV_SELECTION_FIELDS 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_KBS1_ALV_SELECTION_FIELDS INTO WA_KBS1_ALV_SELECTION_FIELDS.


*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 EXTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KBS1_ALV_SELECTION_FIELDS-EXTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KBS1_ALV_SELECTION_FIELDS-EXTNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KSTAR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KBS1_ALV_SELECTION_FIELDS-KSTAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KBS1_ALV_SELECTION_FIELDS-KSTAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KBS1_ALV_SELECTION_FIELDS-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KBS1_ALV_SELECTION_FIELDS-PRCTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_KBS1_ALV_SELECTION_FIELDS-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KBS1_ALV_SELECTION_FIELDS-SPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEEHT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_KBS1_ALV_SELECTION_FIELDS-MEEHT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KBS1_ALV_SELECTION_FIELDS-MEEHT.
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_KBS1_ALV_SELECTION_FIELDS_STR, 
BOX TYPE STRING,
KOKRS TYPE STRING,
EXTNR TYPE STRING,
KSTAR TYPE STRING,
BUKRS TYPE STRING,
WERKS TYPE STRING,
PRCTR TYPE STRING,
ESORT TYPE STRING,
ERFNM TYPE STRING,
ERFDT TYPE STRING,
AENDT TYPE STRING,
AENNM TYPE STRING,
FRFLG TYPE STRING,
DLFLG TYPE STRING,
SPRAS TYPE STRING,
KTEXT TYPE STRING,
LTEXT TYPE STRING,
BTGRP TYPE STRING,
HWGES TYPE STRING,
HWAER TYPE STRING,
LOSGR TYPE STRING,
MEEHT TYPE STRING,
PREIS TYPE STRING,
KALNR TYPE STRING,
KLVAR TYPE STRING,
HWGFX TYPE STRING,
KALSM TYPE STRING,
ZSCHL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KBS1_ALV_SELECTION_FIELDS_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_KBS1_ALV_SELECTION_FIELDS_STR-BOX sy-vline 
WA_KBS1_ALV_SELECTION_FIELDS_STR-KOKRS sy-vline 
WA_KBS1_ALV_SELECTION_FIELDS_STR-EXTNR sy-vline 
WA_KBS1_ALV_SELECTION_FIELDS_STR-KSTAR sy-vline 
WA_KBS1_ALV_SELECTION_FIELDS_STR-BUKRS sy-vline 
WA_KBS1_ALV_SELECTION_FIELDS_STR-WERKS sy-vline 
WA_KBS1_ALV_SELECTION_FIELDS_STR-PRCTR sy-vline 
WA_KBS1_ALV_SELECTION_FIELDS_STR-ESORT sy-vline 
WA_KBS1_ALV_SELECTION_FIELDS_STR-ERFNM sy-vline 
WA_KBS1_ALV_SELECTION_FIELDS_STR-ERFDT sy-vline 
WA_KBS1_ALV_SELECTION_FIELDS_STR-AENDT sy-vline 
WA_KBS1_ALV_SELECTION_FIELDS_STR-AENNM sy-vline 
WA_KBS1_ALV_SELECTION_FIELDS_STR-FRFLG sy-vline 
WA_KBS1_ALV_SELECTION_FIELDS_STR-DLFLG sy-vline 
WA_KBS1_ALV_SELECTION_FIELDS_STR-SPRAS sy-vline 
WA_KBS1_ALV_SELECTION_FIELDS_STR-KTEXT sy-vline 
WA_KBS1_ALV_SELECTION_FIELDS_STR-LTEXT sy-vline 
WA_KBS1_ALV_SELECTION_FIELDS_STR-BTGRP sy-vline 
WA_KBS1_ALV_SELECTION_FIELDS_STR-HWGES sy-vline 
WA_KBS1_ALV_SELECTION_FIELDS_STR-HWAER sy-vline 
WA_KBS1_ALV_SELECTION_FIELDS_STR-LOSGR sy-vline 
WA_KBS1_ALV_SELECTION_FIELDS_STR-MEEHT sy-vline 
WA_KBS1_ALV_SELECTION_FIELDS_STR-PREIS sy-vline 
WA_KBS1_ALV_SELECTION_FIELDS_STR-KALNR sy-vline 
WA_KBS1_ALV_SELECTION_FIELDS_STR-KLVAR sy-vline 
WA_KBS1_ALV_SELECTION_FIELDS_STR-HWGFX sy-vline 
WA_KBS1_ALV_SELECTION_FIELDS_STR-KALSM sy-vline 
WA_KBS1_ALV_SELECTION_FIELDS_STR-ZSCHL sy-vline      INTO ld_text SEPARATED BY SPACE.

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