ABAP Select data from SAP table KOMLFR_PY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KOMLFR_PY
*  INTO TABLE @DATA(IT_KOMLFR_PY2).
*--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_KOMLFR_PY INDEX 1 INTO DATA(WA_KOMLFR_PY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KOMLFR_PY>-WBELN = 1.
<KOMLFR_PY>-LFART = 1.
<KOMLFR_PY>-LFART_TXT = 1.
<KOMLFR_PY>-LFTYP = 1.
<KOMLFR_PY>-VTEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KOMLFR_PY-WFDAT, sy-vline,
  WA_KOMLFR_PY-VKORG, sy-vline,
  WA_KOMLFR_PY-VTWEG, sy-vline,
  WA_KOMLFR_PY-SPART, sy-vline,
  WA_KOMLFR_PY-BUKRS, sy-vline,
  WA_KOMLFR_PY-KUNRG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KOMLFR_PY 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_KOMLFR_PY 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_KOMLFR_PY INTO WA_KOMLFR_PY.


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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field ADRNR_AZ
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMLFR_PY-ADRNR_AZ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMLFR_PY-ADRNR_AZ.
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_KOMLFR_PY_STR, 
WBELN TYPE STRING,
LFART TYPE STRING,
LFART_TXT TYPE STRING,
LFTYP TYPE STRING,
VTEXT TYPE STRING,
WFDAT TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
BUKRS TYPE STRING,
KUNRG TYPE STRING,
KRG_NAME1 TYPE STRING,
WAERL TYPE STRING,
NETWRD TYPE STRING,
BRTWRD TYPE STRING,
MWSBKD TYPE STRING,
RFBSK TYPE STRING,
RFBSK_TXT TYPE STRING,
ZTERMD TYPE STRING,
ZLSCHD TYPE STRING,
BLDAT TYPE STRING,
WFDAT_RL TYPE STRING,
ZUONR TYPE STRING,
XBLNR TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
ARCHIV TYPE STRING,
SELKZ TYPE STRING,
ADRNR_RE TYPE STRING,
ADDR_TYPE_RE TYPE STRING,
ADRNP_RE TYPE STRING,
ADRNR_RS TYPE STRING,
ADRNR_RG TYPE STRING,
ADRNR_AZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KOMLFR_PY_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_KOMLFR_PY_STR-WBELN sy-vline 
WA_KOMLFR_PY_STR-LFART sy-vline 
WA_KOMLFR_PY_STR-LFART_TXT sy-vline 
WA_KOMLFR_PY_STR-LFTYP sy-vline 
WA_KOMLFR_PY_STR-VTEXT sy-vline 
WA_KOMLFR_PY_STR-WFDAT sy-vline 
WA_KOMLFR_PY_STR-VKORG sy-vline 
WA_KOMLFR_PY_STR-VTWEG sy-vline 
WA_KOMLFR_PY_STR-SPART sy-vline 
WA_KOMLFR_PY_STR-BUKRS sy-vline 
WA_KOMLFR_PY_STR-KUNRG sy-vline 
WA_KOMLFR_PY_STR-KRG_NAME1 sy-vline 
WA_KOMLFR_PY_STR-WAERL sy-vline 
WA_KOMLFR_PY_STR-NETWRD sy-vline 
WA_KOMLFR_PY_STR-BRTWRD sy-vline 
WA_KOMLFR_PY_STR-MWSBKD sy-vline 
WA_KOMLFR_PY_STR-RFBSK sy-vline 
WA_KOMLFR_PY_STR-RFBSK_TXT sy-vline 
WA_KOMLFR_PY_STR-ZTERMD sy-vline 
WA_KOMLFR_PY_STR-ZLSCHD sy-vline 
WA_KOMLFR_PY_STR-BLDAT sy-vline 
WA_KOMLFR_PY_STR-WFDAT_RL sy-vline 
WA_KOMLFR_PY_STR-ZUONR sy-vline 
WA_KOMLFR_PY_STR-XBLNR sy-vline 
WA_KOMLFR_PY_STR-ERDAT sy-vline 
WA_KOMLFR_PY_STR-ERNAM sy-vline 
WA_KOMLFR_PY_STR-ARCHIV sy-vline 
WA_KOMLFR_PY_STR-SELKZ sy-vline 
WA_KOMLFR_PY_STR-ADRNR_RE sy-vline 
WA_KOMLFR_PY_STR-ADDR_TYPE_RE sy-vline 
WA_KOMLFR_PY_STR-ADRNP_RE sy-vline 
WA_KOMLFR_PY_STR-ADRNR_RS sy-vline 
WA_KOMLFR_PY_STR-ADRNR_RG sy-vline 
WA_KOMLFR_PY_STR-ADRNR_AZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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