ABAP Select data from SAP table KOMLFRRLE_LIST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KOMLFRRLE_LIST
*  INTO TABLE @DATA(IT_KOMLFRRLE_LIST2).
*--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_KOMLFRRLE_LIST INDEX 1 INTO DATA(WA_KOMLFRRLE_LIST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KOMLFRRLE_LIST>-WBELN = 1.
<KOMLFRRLE_LIST>-POSNR = 1.
<KOMLFRRLE_LIST>-WBELN_AR = 1.
<KOMLFRRLE_LIST>-NETWR = 1.
<KOMLFRRLE_LIST>-MWSBP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KOMLFRRLE_LIST-KWERT_RL, sy-vline,
  WA_KOMLFRRLE_LIST-MWSBP_RL, sy-vline,
  WA_KOMLFRRLE_LIST-WAERL, sy-vline,
  WA_KOMLFRRLE_LIST-RRLREC, sy-vline,
  WA_KOMLFRRLE_LIST-RRLREC_NAME1, sy-vline,
  WA_KOMLFRRLE_LIST-LIFRE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KOMLFRRLE_LIST 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_KOMLFRRLE_LIST 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_KOMLFRRLE_LIST INTO WA_KOMLFRRLE_LIST.


*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_KOMLFRRLE_LIST-WBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMLFRRLE_LIST-WBELN.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field KUNRG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMLFRRLE_LIST-KUNRG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMLFRRLE_LIST-KUNRG.
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_KOMLFRRLE_LIST_STR, 
WBELN TYPE STRING,
POSNR TYPE STRING,
WBELN_AR TYPE STRING,
NETWR TYPE STRING,
MWSBP TYPE STRING,
KWERT_RL TYPE STRING,
MWSBP_RL TYPE STRING,
WAERL TYPE STRING,
RRLREC TYPE STRING,
RRLREC_NAME1 TYPE STRING,
LIFRE TYPE STRING,
LIF_NAME1 TYPE STRING,
LNRZB TYPE STRING,
LZB_NAME1 TYPE STRING,
KUNRE TYPE STRING,
KND_NAME1 TYPE STRING,
KUNRG TYPE STRING,
KRG_NAME1 TYPE STRING,
XBLNR TYPE STRING,
NETWR_VZ TYPE STRING,
MWSBP_VZ TYPE STRING,
KWERT_RL_VZ TYPE STRING,
MWSBP_RL_VZ TYPE STRING,
LFTYP TYPE STRING,
LFTYP_TXT TYPE STRING,
LFTYP_L TYPE STRING,
LFTYP_L_TXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KOMLFRRLE_LIST_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_KOMLFRRLE_LIST_STR-WBELN sy-vline 
WA_KOMLFRRLE_LIST_STR-POSNR sy-vline 
WA_KOMLFRRLE_LIST_STR-WBELN_AR sy-vline 
WA_KOMLFRRLE_LIST_STR-NETWR sy-vline 
WA_KOMLFRRLE_LIST_STR-MWSBP sy-vline 
WA_KOMLFRRLE_LIST_STR-KWERT_RL sy-vline 
WA_KOMLFRRLE_LIST_STR-MWSBP_RL sy-vline 
WA_KOMLFRRLE_LIST_STR-WAERL sy-vline 
WA_KOMLFRRLE_LIST_STR-RRLREC sy-vline 
WA_KOMLFRRLE_LIST_STR-RRLREC_NAME1 sy-vline 
WA_KOMLFRRLE_LIST_STR-LIFRE sy-vline 
WA_KOMLFRRLE_LIST_STR-LIF_NAME1 sy-vline 
WA_KOMLFRRLE_LIST_STR-LNRZB sy-vline 
WA_KOMLFRRLE_LIST_STR-LZB_NAME1 sy-vline 
WA_KOMLFRRLE_LIST_STR-KUNRE sy-vline 
WA_KOMLFRRLE_LIST_STR-KND_NAME1 sy-vline 
WA_KOMLFRRLE_LIST_STR-KUNRG sy-vline 
WA_KOMLFRRLE_LIST_STR-KRG_NAME1 sy-vline 
WA_KOMLFRRLE_LIST_STR-XBLNR sy-vline 
WA_KOMLFRRLE_LIST_STR-NETWR_VZ sy-vline 
WA_KOMLFRRLE_LIST_STR-MWSBP_VZ sy-vline 
WA_KOMLFRRLE_LIST_STR-KWERT_RL_VZ sy-vline 
WA_KOMLFRRLE_LIST_STR-MWSBP_RL_VZ sy-vline 
WA_KOMLFRRLE_LIST_STR-LFTYP sy-vline 
WA_KOMLFRRLE_LIST_STR-LFTYP_TXT sy-vline 
WA_KOMLFRRLE_LIST_STR-LFTYP_L sy-vline 
WA_KOMLFRRLE_LIST_STR-LFTYP_L_TXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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