ABAP Select data from SAP table CKML_VFM_TREE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CKML_VFM_TREE
*  INTO TABLE @DATA(IT_CKML_VFM_TREE2).
*--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_CKML_VFM_TREE INDEX 1 INTO DATA(WA_CKML_VFM_TREE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CKML_VFM_TREE>-LEVEL = 1.
<CKML_VFM_TREE>-BUKRS = 1.
<CKML_VFM_TREE>-BKLAS = 1.
<CKML_VFM_TREE>-WERKS = 1.
<CKML_VFM_TREE>-KALNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CKML_VFM_TREE-NODE_KEY, sy-vline,
  WA_CKML_VFM_TREE-HTEXT, sy-vline,
  WA_CKML_VFM_TREE-ICON, sy-vline,
  WA_CKML_VFM_TREE-ICON_EST, sy-vline,
  WA_CKML_VFM_TREE-ICON_MST, sy-vline,
  WA_CKML_VFM_TREE-ICON_CLO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CKML_VFM_TREE 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_CKML_VFM_TREE 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_CKML_VFM_TREE INTO WA_CKML_VFM_TREE.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CKML_VFM_TREE-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CKML_VFM_TREE-MATNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ABPSP, internal->external for field PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_CKML_VFM_TREE-PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CKML_VFM_TREE-PSPNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CKML_VFM_TREE-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CKML_VFM_TREE-MEINS.
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_CKML_VFM_TREE_STR, 
LEVEL TYPE STRING,
BUKRS TYPE STRING,
BKLAS TYPE STRING,
WERKS TYPE STRING,
KALNR TYPE STRING,
NODE_KEY TYPE STRING,
HTEXT TYPE STRING,
ICON TYPE STRING,
ICON_EST TYPE STRING,
ICON_MST TYPE STRING,
ICON_CLO TYPE STRING,
ICON_FIA TYPE STRING,
STATUS TYPE STRING,
MATNR TYPE STRING,
BWTAR TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
PSPNR TYPE STRING,
MTART TYPE STRING,
MATKL TYPE STRING,
SPART TYPE STRING,
PRCTR TYPE STRING,
CURTP TYPE STRING,
WAERS TYPE STRING,
MEINS TYPE STRING,
DIFF_NDI TYPE STRING,
DIFF_NIN TYPE STRING,
DIFF_CUM TYPE STRING,
DIFF_RSC TYPE STRING,
DIFF_EIV TYPE STRING,
DIFF_NLE TYPE STRING,
DIFF_WIP TYPE STRING,
DIFF_VNO TYPE STRING,
DIFF_FIA TYPE STRING,
DIFF_FIS TYPE STRING,
DIFF_UMB TYPE STRING,
DIFF_ABC TYPE STRING,
VALUE_CUM TYPE STRING,
PB_PRICE TYPE STRING,
PRICE_CUM TYPE STRING,
STPRS TYPE STRING,
LBKUM TYPE STRING,
PB_QUANTITY TYPE STRING,
QUANTITY_CUM TYPE STRING,
SALK3 TYPE STRING,
RESCALE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CKML_VFM_TREE_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_CKML_VFM_TREE_STR-LEVEL sy-vline 
WA_CKML_VFM_TREE_STR-BUKRS sy-vline 
WA_CKML_VFM_TREE_STR-BKLAS sy-vline 
WA_CKML_VFM_TREE_STR-WERKS sy-vline 
WA_CKML_VFM_TREE_STR-KALNR sy-vline 
WA_CKML_VFM_TREE_STR-NODE_KEY sy-vline 
WA_CKML_VFM_TREE_STR-HTEXT sy-vline 
WA_CKML_VFM_TREE_STR-ICON sy-vline 
WA_CKML_VFM_TREE_STR-ICON_EST sy-vline 
WA_CKML_VFM_TREE_STR-ICON_MST sy-vline 
WA_CKML_VFM_TREE_STR-ICON_CLO sy-vline 
WA_CKML_VFM_TREE_STR-ICON_FIA sy-vline 
WA_CKML_VFM_TREE_STR-STATUS sy-vline 
WA_CKML_VFM_TREE_STR-MATNR sy-vline 
WA_CKML_VFM_TREE_STR-BWTAR sy-vline 
WA_CKML_VFM_TREE_STR-VBELN sy-vline 
WA_CKML_VFM_TREE_STR-POSNR sy-vline 
WA_CKML_VFM_TREE_STR-PSPNR sy-vline 
WA_CKML_VFM_TREE_STR-MTART sy-vline 
WA_CKML_VFM_TREE_STR-MATKL sy-vline 
WA_CKML_VFM_TREE_STR-SPART sy-vline 
WA_CKML_VFM_TREE_STR-PRCTR sy-vline 
WA_CKML_VFM_TREE_STR-CURTP sy-vline 
WA_CKML_VFM_TREE_STR-WAERS sy-vline 
WA_CKML_VFM_TREE_STR-MEINS sy-vline 
WA_CKML_VFM_TREE_STR-DIFF_NDI sy-vline 
WA_CKML_VFM_TREE_STR-DIFF_NIN sy-vline 
WA_CKML_VFM_TREE_STR-DIFF_CUM sy-vline 
WA_CKML_VFM_TREE_STR-DIFF_RSC sy-vline 
WA_CKML_VFM_TREE_STR-DIFF_EIV sy-vline 
WA_CKML_VFM_TREE_STR-DIFF_NLE sy-vline 
WA_CKML_VFM_TREE_STR-DIFF_WIP sy-vline 
WA_CKML_VFM_TREE_STR-DIFF_VNO sy-vline 
WA_CKML_VFM_TREE_STR-DIFF_FIA sy-vline 
WA_CKML_VFM_TREE_STR-DIFF_FIS sy-vline 
WA_CKML_VFM_TREE_STR-DIFF_UMB sy-vline 
WA_CKML_VFM_TREE_STR-DIFF_ABC sy-vline 
WA_CKML_VFM_TREE_STR-VALUE_CUM sy-vline 
WA_CKML_VFM_TREE_STR-PB_PRICE sy-vline 
WA_CKML_VFM_TREE_STR-PRICE_CUM sy-vline 
WA_CKML_VFM_TREE_STR-STPRS sy-vline 
WA_CKML_VFM_TREE_STR-LBKUM sy-vline 
WA_CKML_VFM_TREE_STR-PB_QUANTITY sy-vline 
WA_CKML_VFM_TREE_STR-QUANTITY_CUM sy-vline 
WA_CKML_VFM_TREE_STR-SALK3 sy-vline 
WA_CKML_VFM_TREE_STR-RESCALE sy-vline      INTO ld_text SEPARATED BY SPACE.

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