ABAP Select data from SAP table SI_KNA1_FI into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP SI_KNA1_FI 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 SI_KNA1_FI. 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 SI_KNA1_FI 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_SI_KNA1_FI TYPE STANDARD TABLE OF SI_KNA1_FI,
      WA_SI_KNA1_FI TYPE SI_KNA1_FI,
      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: <SI_KNA1_FI> TYPE SI_KNA1_FI.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_SI_KNA1_FI.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM SI_KNA1_FI
  INTO TABLE IT_SI_KNA1_FI.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SI_KNA1_FI
*  INTO TABLE @DATA(IT_SI_KNA1_FI2).
*--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_SI_KNA1_FI INDEX 1 INTO DATA(WA_SI_KNA1_FI2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_SI_KNA1_FI ASSIGNING <SI_KNA1_FI>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SI_KNA1_FI>-SPERR = 1.
<SI_KNA1_FI>-STCD1 = 1.
<SI_KNA1_FI>-STCD2 = 1.
<SI_KNA1_FI>-STKZA = 1.
<SI_KNA1_FI>-STKZU = 1.

ENDLOOP.

LOOP AT IT_SI_KNA1_FI INTO WA_SI_KNA1_FI.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SI_KNA1_FI-VBUND, sy-vline,
  WA_SI_KNA1_FI-XZEMP, sy-vline,
  WA_SI_KNA1_FI-STCEG, sy-vline,
  WA_SI_KNA1_FI-STKZN, sy-vline,
  WA_SI_KNA1_FI-DTAMS, sy-vline,
  WA_SI_KNA1_FI-DTAWS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SI_KNA1_FI 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_SI_KNA1_FI 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_SI_KNA1_FI INTO WA_SI_KNA1_FI.


*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 VBUND
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_SI_KNA1_FI-VBUND
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SI_KNA1_FI-VBUND.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CFOPC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_SI_KNA1_FI-CFOPC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SI_KNA1_FI-CFOPC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TXLW1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_SI_KNA1_FI-TXLW1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SI_KNA1_FI-TXLW1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TXLW2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_SI_KNA1_FI-TXLW2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SI_KNA1_FI-TXLW2.
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_SI_KNA1_FI_STR, 
SPERR TYPE STRING,
STCD1 TYPE STRING,
STCD2 TYPE STRING,
STKZA TYPE STRING,
STKZU TYPE STRING,
VBUND TYPE STRING,
XZEMP TYPE STRING,
STCEG TYPE STRING,
STKZN TYPE STRING,
DTAMS TYPE STRING,
DTAWS TYPE STRING,
FITYP TYPE STRING,
STCDT TYPE STRING,
STCD3 TYPE STRING,
STCD4 TYPE STRING,
XICMS TYPE STRING,
XXIPI TYPE STRING,
CFOPC TYPE STRING,
TXLW1 TYPE STRING,
TXLW2 TYPE STRING,
J_1KFREPRE TYPE STRING,
J_1KFTBUS TYPE STRING,
J_1KFTIND TYPE STRING,
XSUBT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SI_KNA1_FI_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_SI_KNA1_FI_STR-SPERR sy-vline 
WA_SI_KNA1_FI_STR-STCD1 sy-vline 
WA_SI_KNA1_FI_STR-STCD2 sy-vline 
WA_SI_KNA1_FI_STR-STKZA sy-vline 
WA_SI_KNA1_FI_STR-STKZU sy-vline 
WA_SI_KNA1_FI_STR-VBUND sy-vline 
WA_SI_KNA1_FI_STR-XZEMP sy-vline 
WA_SI_KNA1_FI_STR-STCEG sy-vline 
WA_SI_KNA1_FI_STR-STKZN sy-vline 
WA_SI_KNA1_FI_STR-DTAMS sy-vline 
WA_SI_KNA1_FI_STR-DTAWS sy-vline 
WA_SI_KNA1_FI_STR-FITYP sy-vline 
WA_SI_KNA1_FI_STR-STCDT sy-vline 
WA_SI_KNA1_FI_STR-STCD3 sy-vline 
WA_SI_KNA1_FI_STR-STCD4 sy-vline 
WA_SI_KNA1_FI_STR-XICMS sy-vline 
WA_SI_KNA1_FI_STR-XXIPI sy-vline 
WA_SI_KNA1_FI_STR-CFOPC sy-vline 
WA_SI_KNA1_FI_STR-TXLW1 sy-vline 
WA_SI_KNA1_FI_STR-TXLW2 sy-vline 
WA_SI_KNA1_FI_STR-J_1KFREPRE sy-vline 
WA_SI_KNA1_FI_STR-J_1KFTBUS sy-vline 
WA_SI_KNA1_FI_STR-J_1KFTIND sy-vline 
WA_SI_KNA1_FI_STR-XSUBT sy-vline      INTO ld_text SEPARATED BY SPACE.

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