ABAP Select data from SAP table SDCAS_KNA1_LISTE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP SDCAS_KNA1_LISTE 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 SDCAS_KNA1_LISTE. 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 SDCAS_KNA1_LISTE 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_SDCAS_KNA1_LISTE TYPE STANDARD TABLE OF SDCAS_KNA1_LISTE,
      WA_SDCAS_KNA1_LISTE TYPE SDCAS_KNA1_LISTE,
      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: <SDCAS_KNA1_LISTE> TYPE SDCAS_KNA1_LISTE.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_SDCAS_KNA1_LISTE.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM SDCAS_KNA1_LISTE
  INTO TABLE IT_SDCAS_KNA1_LISTE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SDCAS_KNA1_LISTE
*  INTO TABLE @DATA(IT_SDCAS_KNA1_LISTE2).
*--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_SDCAS_KNA1_LISTE INDEX 1 INTO DATA(WA_SDCAS_KNA1_LISTE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_SDCAS_KNA1_LISTE ASSIGNING <SDCAS_KNA1_LISTE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SDCAS_KNA1_LISTE>-AUFSD = 1.
<SDCAS_KNA1_LISTE>-BAHNE = 1.
<SDCAS_KNA1_LISTE>-BAHNS = 1.
<SDCAS_KNA1_LISTE>-BBBNR = 1.
<SDCAS_KNA1_LISTE>-BBSNR = 1.

ENDLOOP.

LOOP AT IT_SDCAS_KNA1_LISTE INTO WA_SDCAS_KNA1_LISTE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SDCAS_KNA1_LISTE-BRSCH, sy-vline,
  WA_SDCAS_KNA1_LISTE-BUBKZ, sy-vline,
  WA_SDCAS_KNA1_LISTE-EXABL, sy-vline,
  WA_SDCAS_KNA1_LISTE-FAKSD, sy-vline,
  WA_SDCAS_KNA1_LISTE-KONZS, sy-vline,
  WA_SDCAS_KNA1_LISTE-KTOKD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SDCAS_KNA1_LISTE 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_SDCAS_KNA1_LISTE 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_SDCAS_KNA1_LISTE INTO WA_SDCAS_KNA1_LISTE.


*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_SDCAS_KNA1_LISTE_STR, 
AUFSD TYPE STRING,
BAHNE TYPE STRING,
BAHNS TYPE STRING,
BBBNR TYPE STRING,
BBSNR TYPE STRING,
BRSCH TYPE STRING,
BUBKZ TYPE STRING,
EXABL TYPE STRING,
FAKSD TYPE STRING,
KONZS TYPE STRING,
KTOKD TYPE STRING,
KUKLA TYPE STRING,
LIFSD TYPE STRING,
LOEVM TYPE STRING,
RPMKR TYPE STRING,
NIELS TYPE STRING,
GFORM TYPE STRING,
BRAN1 TYPE STRING,
BRAN2 TYPE STRING,
BRAN3 TYPE STRING,
BRAN4 TYPE STRING,
BRAN5 TYPE STRING,
UMJAH TYPE STRING,
UWAER TYPE STRING,
JMZAH TYPE STRING,
JMJAH TYPE STRING,
KATR1 TYPE STRING,
KATR2 TYPE STRING,
KATR3 TYPE STRING,
KATR4 TYPE STRING,
KATR5 TYPE STRING,
KATR6 TYPE STRING,
KATR7 TYPE STRING,
KATR8 TYPE STRING,
KATR9 TYPE STRING,
KATR10 TYPE STRING,
STKZN TYPE STRING,
UMSA1 TYPE STRING,
CIVVE TYPE STRING,
MILVE TYPE STRING,
ANRED_KNA1 TYPE STRING,
NAME1_KNA1 TYPE STRING,
NAME2_KNA1 TYPE STRING,
NAME3_KNA1 TYPE STRING,
NAME4_KNA1 TYPE STRING,
STRAS_KNA1 TYPE STRING,
LAND1_KNA1 TYPE STRING,
PSTLZ_KNA1 TYPE STRING,
PSTL2_KNA1 TYPE STRING,
PFORT_KNA1 TYPE STRING,
ORT01_KNA1 TYPE STRING,
ORT02_KNA1 TYPE STRING,
REGIO_KNA1 TYPE STRING,
CITYC_KNA1 TYPE STRING,
COUNC_KNA1 TYPE STRING,
PFACH_KNA1 TYPE STRING,
TELF1_KNA1 TYPE STRING,
TELF2_KNA1 TYPE STRING,
TELBX_KNA1 TYPE STRING,
TELFX_KNA1 TYPE STRING,
TELTX_KNA1 TYPE STRING,
TELX1_KNA1 TYPE STRING,
LZONE_KNA1 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SDCAS_KNA1_LISTE_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_SDCAS_KNA1_LISTE_STR-AUFSD sy-vline 
WA_SDCAS_KNA1_LISTE_STR-BAHNE sy-vline 
WA_SDCAS_KNA1_LISTE_STR-BAHNS sy-vline 
WA_SDCAS_KNA1_LISTE_STR-BBBNR sy-vline 
WA_SDCAS_KNA1_LISTE_STR-BBSNR sy-vline 
WA_SDCAS_KNA1_LISTE_STR-BRSCH sy-vline 
WA_SDCAS_KNA1_LISTE_STR-BUBKZ sy-vline 
WA_SDCAS_KNA1_LISTE_STR-EXABL sy-vline 
WA_SDCAS_KNA1_LISTE_STR-FAKSD sy-vline 
WA_SDCAS_KNA1_LISTE_STR-KONZS sy-vline 
WA_SDCAS_KNA1_LISTE_STR-KTOKD sy-vline 
WA_SDCAS_KNA1_LISTE_STR-KUKLA sy-vline 
WA_SDCAS_KNA1_LISTE_STR-LIFSD sy-vline 
WA_SDCAS_KNA1_LISTE_STR-LOEVM sy-vline 
WA_SDCAS_KNA1_LISTE_STR-RPMKR sy-vline 
WA_SDCAS_KNA1_LISTE_STR-NIELS sy-vline 
WA_SDCAS_KNA1_LISTE_STR-GFORM sy-vline 
WA_SDCAS_KNA1_LISTE_STR-BRAN1 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-BRAN2 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-BRAN3 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-BRAN4 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-BRAN5 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-UMJAH sy-vline 
WA_SDCAS_KNA1_LISTE_STR-UWAER sy-vline 
WA_SDCAS_KNA1_LISTE_STR-JMZAH sy-vline 
WA_SDCAS_KNA1_LISTE_STR-JMJAH sy-vline 
WA_SDCAS_KNA1_LISTE_STR-KATR1 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-KATR2 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-KATR3 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-KATR4 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-KATR5 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-KATR6 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-KATR7 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-KATR8 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-KATR9 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-KATR10 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-STKZN sy-vline 
WA_SDCAS_KNA1_LISTE_STR-UMSA1 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-CIVVE sy-vline 
WA_SDCAS_KNA1_LISTE_STR-MILVE sy-vline 
WA_SDCAS_KNA1_LISTE_STR-ANRED_KNA1 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-NAME1_KNA1 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-NAME2_KNA1 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-NAME3_KNA1 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-NAME4_KNA1 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-STRAS_KNA1 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-LAND1_KNA1 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-PSTLZ_KNA1 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-PSTL2_KNA1 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-PFORT_KNA1 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-ORT01_KNA1 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-ORT02_KNA1 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-REGIO_KNA1 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-CITYC_KNA1 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-COUNC_KNA1 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-PFACH_KNA1 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-TELF1_KNA1 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-TELF2_KNA1 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-TELBX_KNA1 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-TELFX_KNA1 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-TELTX_KNA1 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-TELX1_KNA1 sy-vline 
WA_SDCAS_KNA1_LISTE_STR-LZONE_KNA1 sy-vline      INTO ld_text SEPARATED BY SPACE.

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