ABAP Select data from SAP table WINT_KNA1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WINT_KNA1 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 WINT_KNA1. 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 WINT_KNA1 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_WINT_KNA1 TYPE STANDARD TABLE OF WINT_KNA1,
      WA_WINT_KNA1 TYPE WINT_KNA1,
      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: <WINT_KNA1> TYPE WINT_KNA1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_WINT_KNA1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM WINT_KNA1
  INTO TABLE IT_WINT_KNA1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WINT_KNA1
*  INTO TABLE @DATA(IT_WINT_KNA12).
*--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_WINT_KNA1 INDEX 1 INTO DATA(WA_WINT_KNA12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_WINT_KNA1 ASSIGNING <WINT_KNA1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WINT_KNA1>-MANDT = 1.
<WINT_KNA1>-KUNNR = 1.
<WINT_KNA1>-AUFSD = 1.
<WINT_KNA1>-BBBNR = 1.
<WINT_KNA1>-BBSNR = 1.

ENDLOOP.

LOOP AT IT_WINT_KNA1 INTO WA_WINT_KNA1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WINT_KNA1-BEGRU, sy-vline,
  WA_WINT_KNA1-BRSCH, sy-vline,
  WA_WINT_KNA1-BUBKZ, sy-vline,
  WA_WINT_KNA1-EXABL, sy-vline,
  WA_WINT_KNA1-FAKSD, sy-vline,
  WA_WINT_KNA1-KNAZK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WINT_KNA1 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_WINT_KNA1 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_WINT_KNA1 INTO WA_WINT_KNA1.


*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 KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WINT_KNA1-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WINT_KNA1-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KNRZA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WINT_KNA1-KNRZA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WINT_KNA1-KNRZA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WINT_KNA1-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WINT_KNA1-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_WINT_KNA1-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WINT_KNA1-SPRAS.
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_WINT_KNA1_STR, 
MANDT TYPE STRING,
KUNNR TYPE STRING,
AUFSD TYPE STRING,
BBBNR TYPE STRING,
BBSNR TYPE STRING,
BEGRU TYPE STRING,
BRSCH TYPE STRING,
BUBKZ TYPE STRING,
EXABL TYPE STRING,
FAKSD TYPE STRING,
KNAZK TYPE STRING,
KNRZA TYPE STRING,
KUKLA TYPE STRING,
LAND1 TYPE STRING,
LIFNR TYPE STRING,
LIFSD TYPE STRING,
LOEVM TYPE STRING,
NAME1 TYPE STRING,
NIELS TYPE STRING,
RPMKR TYPE STRING,
SPERR TYPE STRING,
SPRAS TYPE STRING,
STKZA TYPE STRING,
STKZU TYPE STRING,
XCPDK TYPE STRING,
XZEMP TYPE STRING,
DEAR1 TYPE STRING,
DEAR2 TYPE STRING,
DEAR3 TYPE STRING,
DEAR4 TYPE STRING,
DEAR5 TYPE STRING,
GFORM TYPE STRING,
STKZN TYPE STRING,
INSPBYDEBI TYPE STRING,
INSPATDEBI TYPE STRING,
KTOCD TYPE STRING,
WERKS TYPE STRING,
DTAMS TYPE STRING,
DTAWS TYPE STRING,
DUEFL TYPE STRING,
HZUOR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WINT_KNA1_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_WINT_KNA1_STR-MANDT sy-vline 
WA_WINT_KNA1_STR-KUNNR sy-vline 
WA_WINT_KNA1_STR-AUFSD sy-vline 
WA_WINT_KNA1_STR-BBBNR sy-vline 
WA_WINT_KNA1_STR-BBSNR sy-vline 
WA_WINT_KNA1_STR-BEGRU sy-vline 
WA_WINT_KNA1_STR-BRSCH sy-vline 
WA_WINT_KNA1_STR-BUBKZ sy-vline 
WA_WINT_KNA1_STR-EXABL sy-vline 
WA_WINT_KNA1_STR-FAKSD sy-vline 
WA_WINT_KNA1_STR-KNAZK sy-vline 
WA_WINT_KNA1_STR-KNRZA sy-vline 
WA_WINT_KNA1_STR-KUKLA sy-vline 
WA_WINT_KNA1_STR-LAND1 sy-vline 
WA_WINT_KNA1_STR-LIFNR sy-vline 
WA_WINT_KNA1_STR-LIFSD sy-vline 
WA_WINT_KNA1_STR-LOEVM sy-vline 
WA_WINT_KNA1_STR-NAME1 sy-vline 
WA_WINT_KNA1_STR-NIELS sy-vline 
WA_WINT_KNA1_STR-RPMKR sy-vline 
WA_WINT_KNA1_STR-SPERR sy-vline 
WA_WINT_KNA1_STR-SPRAS sy-vline 
WA_WINT_KNA1_STR-STKZA sy-vline 
WA_WINT_KNA1_STR-STKZU sy-vline 
WA_WINT_KNA1_STR-XCPDK sy-vline 
WA_WINT_KNA1_STR-XZEMP sy-vline 
WA_WINT_KNA1_STR-DEAR1 sy-vline 
WA_WINT_KNA1_STR-DEAR2 sy-vline 
WA_WINT_KNA1_STR-DEAR3 sy-vline 
WA_WINT_KNA1_STR-DEAR4 sy-vline 
WA_WINT_KNA1_STR-DEAR5 sy-vline 
WA_WINT_KNA1_STR-GFORM sy-vline 
WA_WINT_KNA1_STR-STKZN sy-vline 
WA_WINT_KNA1_STR-INSPBYDEBI sy-vline 
WA_WINT_KNA1_STR-INSPATDEBI sy-vline 
WA_WINT_KNA1_STR-KTOCD sy-vline 
WA_WINT_KNA1_STR-WERKS sy-vline 
WA_WINT_KNA1_STR-DTAMS sy-vline 
WA_WINT_KNA1_STR-DTAWS sy-vline 
WA_WINT_KNA1_STR-DUEFL sy-vline 
WA_WINT_KNA1_STR-HZUOR sy-vline      INTO ld_text SEPARATED BY SPACE.

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