ABAP Select data from SAP table E1KNA1M into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E1KNA1M 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 E1KNA1M. 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 E1KNA1M 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_E1KNA1M TYPE STANDARD TABLE OF E1KNA1M,
      WA_E1KNA1M TYPE E1KNA1M,
      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: <E1KNA1M> TYPE E1KNA1M.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E1KNA1M.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E1KNA1M
  INTO TABLE IT_E1KNA1M.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E1KNA1M
*  INTO TABLE @DATA(IT_E1KNA1M2).
*--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_E1KNA1M INDEX 1 INTO DATA(WA_E1KNA1M2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E1KNA1M ASSIGNING <E1KNA1M>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E1KNA1M>-MSGFN = 1.
<E1KNA1M>-KUNNR = 1.
<E1KNA1M>-ANRED = 1.
<E1KNA1M>-AUFSD = 1.
<E1KNA1M>-BAHNE = 1.

ENDLOOP.

LOOP AT IT_E1KNA1M INTO WA_E1KNA1M.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E1KNA1M-BAHNS, sy-vline,
  WA_E1KNA1M-BBBNR, sy-vline,
  WA_E1KNA1M-BBSNR, sy-vline,
  WA_E1KNA1M-BEGRU, sy-vline,
  WA_E1KNA1M-BRSCH, sy-vline,
  WA_E1KNA1M-BUBKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E1KNA1M 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_E1KNA1M 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_E1KNA1M INTO WA_E1KNA1M.


*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_E1KNA1M_STR, 
MSGFN TYPE STRING,
KUNNR TYPE STRING,
ANRED TYPE STRING,
AUFSD TYPE STRING,
BAHNE TYPE STRING,
BAHNS TYPE STRING,
BBBNR TYPE STRING,
BBSNR TYPE STRING,
BEGRU TYPE STRING,
BRSCH TYPE STRING,
BUBKZ TYPE STRING,
DATLT TYPE STRING,
FAKSD TYPE STRING,
FISKN TYPE STRING,
KNRZA TYPE STRING,
KONZS TYPE STRING,
KTOKD TYPE STRING,
KUKLA TYPE STRING,
LAND1 TYPE STRING,
LIFNR TYPE STRING,
LIFSD TYPE STRING,
LOCCO TYPE STRING,
LOEVM TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
NAME3 TYPE STRING,
NAME4 TYPE STRING,
NIELS TYPE STRING,
ORT01 TYPE STRING,
ORT02 TYPE STRING,
PFACH TYPE STRING,
PSTL2 TYPE STRING,
PSTLZ TYPE STRING,
REGIO TYPE STRING,
COUNC TYPE STRING,
CITYC TYPE STRING,
RPMKR TYPE STRING,
SORTL TYPE STRING,
SPERR TYPE STRING,
SPRAS TYPE STRING,
STCD1 TYPE STRING,
STCD2 TYPE STRING,
STKZA TYPE STRING,
STKZU TYPE STRING,
STRAS TYPE STRING,
TELBX TYPE STRING,
TELF1 TYPE STRING,
TELF2 TYPE STRING,
TELFX TYPE STRING,
TELTX TYPE STRING,
TELX1 TYPE STRING,
LZONE TYPE STRING,
XZEMP TYPE STRING,
VBUND TYPE STRING,
STCEG 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,
TXJCD TYPE STRING,
PERIV TYPE STRING,
KTOCD TYPE STRING,
PFORT TYPE STRING,
DTAMS TYPE STRING,
DTAWS TYPE STRING,
HZUOR TYPE STRING,
CIVVE TYPE STRING,
MILVE TYPE STRING,
SPRAS_ISO TYPE STRING,
FITYP TYPE STRING,
STCDT TYPE STRING,
STCD3 TYPE STRING,
STCD4 TYPE STRING,
XICMS TYPE STRING,
XXIPI TYPE STRING,
XSUBT TYPE STRING,
CFOPC TYPE STRING,
TXLW1 TYPE STRING,
TXLW2 TYPE STRING,
CCC01 TYPE STRING,
CCC02 TYPE STRING,
CCC03 TYPE STRING,
CCC04 TYPE STRING,
CASSD TYPE STRING,
KDKG1 TYPE STRING,
KDKG2 TYPE STRING,
KDKG3 TYPE STRING,
KDKG4 TYPE STRING,
KDKG5 TYPE STRING,
NODEL TYPE STRING,
XSUB2 TYPE STRING,
WERKS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E1KNA1M_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_E1KNA1M_STR-MSGFN sy-vline 
WA_E1KNA1M_STR-KUNNR sy-vline 
WA_E1KNA1M_STR-ANRED sy-vline 
WA_E1KNA1M_STR-AUFSD sy-vline 
WA_E1KNA1M_STR-BAHNE sy-vline 
WA_E1KNA1M_STR-BAHNS sy-vline 
WA_E1KNA1M_STR-BBBNR sy-vline 
WA_E1KNA1M_STR-BBSNR sy-vline 
WA_E1KNA1M_STR-BEGRU sy-vline 
WA_E1KNA1M_STR-BRSCH sy-vline 
WA_E1KNA1M_STR-BUBKZ sy-vline 
WA_E1KNA1M_STR-DATLT sy-vline 
WA_E1KNA1M_STR-FAKSD sy-vline 
WA_E1KNA1M_STR-FISKN sy-vline 
WA_E1KNA1M_STR-KNRZA sy-vline 
WA_E1KNA1M_STR-KONZS sy-vline 
WA_E1KNA1M_STR-KTOKD sy-vline 
WA_E1KNA1M_STR-KUKLA sy-vline 
WA_E1KNA1M_STR-LAND1 sy-vline 
WA_E1KNA1M_STR-LIFNR sy-vline 
WA_E1KNA1M_STR-LIFSD sy-vline 
WA_E1KNA1M_STR-LOCCO sy-vline 
WA_E1KNA1M_STR-LOEVM sy-vline 
WA_E1KNA1M_STR-NAME1 sy-vline 
WA_E1KNA1M_STR-NAME2 sy-vline 
WA_E1KNA1M_STR-NAME3 sy-vline 
WA_E1KNA1M_STR-NAME4 sy-vline 
WA_E1KNA1M_STR-NIELS sy-vline 
WA_E1KNA1M_STR-ORT01 sy-vline 
WA_E1KNA1M_STR-ORT02 sy-vline 
WA_E1KNA1M_STR-PFACH sy-vline 
WA_E1KNA1M_STR-PSTL2 sy-vline 
WA_E1KNA1M_STR-PSTLZ sy-vline 
WA_E1KNA1M_STR-REGIO sy-vline 
WA_E1KNA1M_STR-COUNC sy-vline 
WA_E1KNA1M_STR-CITYC sy-vline 
WA_E1KNA1M_STR-RPMKR sy-vline 
WA_E1KNA1M_STR-SORTL sy-vline 
WA_E1KNA1M_STR-SPERR sy-vline 
WA_E1KNA1M_STR-SPRAS sy-vline 
WA_E1KNA1M_STR-STCD1 sy-vline 
WA_E1KNA1M_STR-STCD2 sy-vline 
WA_E1KNA1M_STR-STKZA sy-vline 
WA_E1KNA1M_STR-STKZU sy-vline 
WA_E1KNA1M_STR-STRAS sy-vline 
WA_E1KNA1M_STR-TELBX sy-vline 
WA_E1KNA1M_STR-TELF1 sy-vline 
WA_E1KNA1M_STR-TELF2 sy-vline 
WA_E1KNA1M_STR-TELFX sy-vline 
WA_E1KNA1M_STR-TELTX sy-vline 
WA_E1KNA1M_STR-TELX1 sy-vline 
WA_E1KNA1M_STR-LZONE sy-vline 
WA_E1KNA1M_STR-XZEMP sy-vline 
WA_E1KNA1M_STR-VBUND sy-vline 
WA_E1KNA1M_STR-STCEG sy-vline 
WA_E1KNA1M_STR-GFORM sy-vline 
WA_E1KNA1M_STR-BRAN1 sy-vline 
WA_E1KNA1M_STR-BRAN2 sy-vline 
WA_E1KNA1M_STR-BRAN3 sy-vline 
WA_E1KNA1M_STR-BRAN4 sy-vline 
WA_E1KNA1M_STR-BRAN5 sy-vline 
WA_E1KNA1M_STR-UMJAH sy-vline 
WA_E1KNA1M_STR-UWAER sy-vline 
WA_E1KNA1M_STR-JMZAH sy-vline 
WA_E1KNA1M_STR-JMJAH sy-vline 
WA_E1KNA1M_STR-KATR1 sy-vline 
WA_E1KNA1M_STR-KATR2 sy-vline 
WA_E1KNA1M_STR-KATR3 sy-vline 
WA_E1KNA1M_STR-KATR4 sy-vline 
WA_E1KNA1M_STR-KATR5 sy-vline 
WA_E1KNA1M_STR-KATR6 sy-vline 
WA_E1KNA1M_STR-KATR7 sy-vline 
WA_E1KNA1M_STR-KATR8 sy-vline 
WA_E1KNA1M_STR-KATR9 sy-vline 
WA_E1KNA1M_STR-KATR10 sy-vline 
WA_E1KNA1M_STR-STKZN sy-vline 
WA_E1KNA1M_STR-UMSA1 sy-vline 
WA_E1KNA1M_STR-TXJCD sy-vline 
WA_E1KNA1M_STR-PERIV sy-vline 
WA_E1KNA1M_STR-KTOCD sy-vline 
WA_E1KNA1M_STR-PFORT sy-vline 
WA_E1KNA1M_STR-DTAMS sy-vline 
WA_E1KNA1M_STR-DTAWS sy-vline 
WA_E1KNA1M_STR-HZUOR sy-vline 
WA_E1KNA1M_STR-CIVVE sy-vline 
WA_E1KNA1M_STR-MILVE sy-vline 
WA_E1KNA1M_STR-SPRAS_ISO sy-vline 
WA_E1KNA1M_STR-FITYP sy-vline 
WA_E1KNA1M_STR-STCDT sy-vline 
WA_E1KNA1M_STR-STCD3 sy-vline 
WA_E1KNA1M_STR-STCD4 sy-vline 
WA_E1KNA1M_STR-XICMS sy-vline 
WA_E1KNA1M_STR-XXIPI sy-vline 
WA_E1KNA1M_STR-XSUBT sy-vline 
WA_E1KNA1M_STR-CFOPC sy-vline 
WA_E1KNA1M_STR-TXLW1 sy-vline 
WA_E1KNA1M_STR-TXLW2 sy-vline 
WA_E1KNA1M_STR-CCC01 sy-vline 
WA_E1KNA1M_STR-CCC02 sy-vline 
WA_E1KNA1M_STR-CCC03 sy-vline 
WA_E1KNA1M_STR-CCC04 sy-vline 
WA_E1KNA1M_STR-CASSD sy-vline 
WA_E1KNA1M_STR-KDKG1 sy-vline 
WA_E1KNA1M_STR-KDKG2 sy-vline 
WA_E1KNA1M_STR-KDKG3 sy-vline 
WA_E1KNA1M_STR-KDKG4 sy-vline 
WA_E1KNA1M_STR-KDKG5 sy-vline 
WA_E1KNA1M_STR-NODEL sy-vline 
WA_E1KNA1M_STR-XSUB2 sy-vline 
WA_E1KNA1M_STR-WERKS sy-vline      INTO ld_text SEPARATED BY SPACE.

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