ABAP Select data from SAP table CLX2F into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CLX2F 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 CLX2F. 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 CLX2F 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_CLX2F TYPE STANDARD TABLE OF CLX2F,
      WA_CLX2F TYPE CLX2F,
      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: <CLX2F> TYPE CLX2F.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CLX2F.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CLX2F
  INTO TABLE IT_CLX2F.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CLX2F
*  INTO TABLE @DATA(IT_CLX2F2).
*--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_CLX2F INDEX 1 INTO DATA(WA_CLX2F2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CLX2F ASSIGNING <CLX2F>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CLX2F>-ATNAM = 1.
<CLX2F>-ATBEZ = 1.
<CLX2F>-ATINN = 1.
<CLX2F>-ATFOR = 1.
<CLX2F>-ANZST = 1.

ENDLOOP.

LOOP AT IT_CLX2F INTO WA_CLX2F.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CLX2F-ANZDZ, sy-vline,
  WA_CLX2F-ATVOR, sy-vline,
  WA_CLX2F-ATKLE, sy-vline,
  WA_CLX2F-ATERF, sy-vline,
  WA_CLX2F-MSEHI, sy-vline,
  WA_CLX2F-ATINT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CLX2F 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_CLX2F 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_CLX2F INTO WA_CLX2F.


*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 ATINN, internal->external for field ATINN
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_CLX2F-ATINN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CLX2F-ATINN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CLX2F-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CLX2F-DOKNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ATINN, internal->external for field ATINO
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_CLX2F-ATINO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CLX2F-ATINO.
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_CLX2F_STR, 
ATNAM TYPE STRING,
ATBEZ TYPE STRING,
ATINN TYPE STRING,
ATFOR TYPE STRING,
ANZST TYPE STRING,
ANZDZ TYPE STRING,
ATVOR TYPE STRING,
ATKLE TYPE STRING,
ATERF TYPE STRING,
MSEHI TYPE STRING,
ATINT TYPE STRING,
ATSON TYPE STRING,
DINKB TYPE STRING,
ABTEI TYPE STRING,
HERKU TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
KNOBJ TYPE STRING,
WERKS TYPE STRING,
KATALOGART TYPE STRING,
AUSWAHLMGE TYPE STRING,
ATWRD TYPE STRING,
ATVSC TYPE STRING,
ATFOD TYPE STRING,
ATTAB TYPE STRING,
ATFEL TYPE STRING,
ATTEI TYPE STRING,
ATSCH TYPE STRING,
ATINO TYPE STRING,
CLINT TYPE STRING,
ATVIE TYPE STRING,
ATINP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CLX2F_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_CLX2F_STR-ATNAM sy-vline 
WA_CLX2F_STR-ATBEZ sy-vline 
WA_CLX2F_STR-ATINN sy-vline 
WA_CLX2F_STR-ATFOR sy-vline 
WA_CLX2F_STR-ANZST sy-vline 
WA_CLX2F_STR-ANZDZ sy-vline 
WA_CLX2F_STR-ATVOR sy-vline 
WA_CLX2F_STR-ATKLE sy-vline 
WA_CLX2F_STR-ATERF sy-vline 
WA_CLX2F_STR-MSEHI sy-vline 
WA_CLX2F_STR-ATINT sy-vline 
WA_CLX2F_STR-ATSON sy-vline 
WA_CLX2F_STR-DINKB sy-vline 
WA_CLX2F_STR-ABTEI sy-vline 
WA_CLX2F_STR-HERKU sy-vline 
WA_CLX2F_STR-DOKAR sy-vline 
WA_CLX2F_STR-DOKNR sy-vline 
WA_CLX2F_STR-DOKVR sy-vline 
WA_CLX2F_STR-DOKTL sy-vline 
WA_CLX2F_STR-KNOBJ sy-vline 
WA_CLX2F_STR-WERKS sy-vline 
WA_CLX2F_STR-KATALOGART sy-vline 
WA_CLX2F_STR-AUSWAHLMGE sy-vline 
WA_CLX2F_STR-ATWRD sy-vline 
WA_CLX2F_STR-ATVSC sy-vline 
WA_CLX2F_STR-ATFOD sy-vline 
WA_CLX2F_STR-ATTAB sy-vline 
WA_CLX2F_STR-ATFEL sy-vline 
WA_CLX2F_STR-ATTEI sy-vline 
WA_CLX2F_STR-ATSCH sy-vline 
WA_CLX2F_STR-ATINO sy-vline 
WA_CLX2F_STR-CLINT sy-vline 
WA_CLX2F_STR-ATVIE sy-vline 
WA_CLX2F_STR-ATINP sy-vline      INTO ld_text SEPARATED BY SPACE.

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