ABAP Select data from SAP table REEX_AR_CLEARING into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REEX_AR_CLEARING
*  INTO TABLE @DATA(IT_REEX_AR_CLEARING2).
*--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_REEX_AR_CLEARING INDEX 1 INTO DATA(WA_REEX_AR_CLEARING2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REEX_AR_CLEARING>-BUKRS = 1.
<REEX_AR_CLEARING>-KOART = 1.
<REEX_AR_CLEARING>-SHKZG = 1.
<REEX_AR_CLEARING>-BSCHL = 1.
<REEX_AR_CLEARING>-UMSKZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REEX_AR_CLEARING-HKONT, sy-vline,
  WA_REEX_AR_CLEARING-KUNNR, sy-vline,
  WA_REEX_AR_CLEARING-MWSKZ, sy-vline,
  WA_REEX_AR_CLEARING-WRBTR, sy-vline,
  WA_REEX_AR_CLEARING-WAERS, sy-vline,
  WA_REEX_AR_CLEARING-SGTXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REEX_AR_CLEARING 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_REEX_AR_CLEARING 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_REEX_AR_CLEARING INTO WA_REEX_AR_CLEARING.


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

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

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

*Conversion exit ALPHA, internal->external for field PARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REEX_AR_CLEARING-PARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REEX_AR_CLEARING-PARTNER.
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_REEX_AR_CLEARING_STR, 
BUKRS TYPE STRING,
KOART TYPE STRING,
SHKZG TYPE STRING,
BSCHL TYPE STRING,
UMSKZ TYPE STRING,
HKONT TYPE STRING,
KUNNR TYPE STRING,
MWSKZ TYPE STRING,
WRBTR TYPE STRING,
WAERS TYPE STRING,
SGTXT TYPE STRING,
VALUT TYPE STRING,
ZUONR TYPE STRING,
GSBER TYPE STRING,
ZFBDT TYPE STRING,
ZTERM TYPE STRING,
ZLSCH TYPE STRING,
ZLSPR TYPE STRING,
HBKID TYPE STRING,
HKTID TYPE STRING,
BVTYP TYPE STRING,
MABER TYPE STRING,
MANSP TYPE STRING,
VERTT TYPE STRING,
VERTN TYPE STRING,
VBEWA TYPE STRING,
TXJCD TYPE STRING,
LAND1 TYPE STRING,
KALSM TYPE STRING,
PARTNER TYPE STRING,
LZBKZ TYPE STRING,
LANDL TYPE STRING,
MNDID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REEX_AR_CLEARING_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_REEX_AR_CLEARING_STR-BUKRS sy-vline 
WA_REEX_AR_CLEARING_STR-KOART sy-vline 
WA_REEX_AR_CLEARING_STR-SHKZG sy-vline 
WA_REEX_AR_CLEARING_STR-BSCHL sy-vline 
WA_REEX_AR_CLEARING_STR-UMSKZ sy-vline 
WA_REEX_AR_CLEARING_STR-HKONT sy-vline 
WA_REEX_AR_CLEARING_STR-KUNNR sy-vline 
WA_REEX_AR_CLEARING_STR-MWSKZ sy-vline 
WA_REEX_AR_CLEARING_STR-WRBTR sy-vline 
WA_REEX_AR_CLEARING_STR-WAERS sy-vline 
WA_REEX_AR_CLEARING_STR-SGTXT sy-vline 
WA_REEX_AR_CLEARING_STR-VALUT sy-vline 
WA_REEX_AR_CLEARING_STR-ZUONR sy-vline 
WA_REEX_AR_CLEARING_STR-GSBER sy-vline 
WA_REEX_AR_CLEARING_STR-ZFBDT sy-vline 
WA_REEX_AR_CLEARING_STR-ZTERM sy-vline 
WA_REEX_AR_CLEARING_STR-ZLSCH sy-vline 
WA_REEX_AR_CLEARING_STR-ZLSPR sy-vline 
WA_REEX_AR_CLEARING_STR-HBKID sy-vline 
WA_REEX_AR_CLEARING_STR-HKTID sy-vline 
WA_REEX_AR_CLEARING_STR-BVTYP sy-vline 
WA_REEX_AR_CLEARING_STR-MABER sy-vline 
WA_REEX_AR_CLEARING_STR-MANSP sy-vline 
WA_REEX_AR_CLEARING_STR-VERTT sy-vline 
WA_REEX_AR_CLEARING_STR-VERTN sy-vline 
WA_REEX_AR_CLEARING_STR-VBEWA sy-vline 
WA_REEX_AR_CLEARING_STR-TXJCD sy-vline 
WA_REEX_AR_CLEARING_STR-LAND1 sy-vline 
WA_REEX_AR_CLEARING_STR-KALSM sy-vline 
WA_REEX_AR_CLEARING_STR-PARTNER sy-vline 
WA_REEX_AR_CLEARING_STR-LZBKZ sy-vline 
WA_REEX_AR_CLEARING_STR-LANDL sy-vline 
WA_REEX_AR_CLEARING_STR-MNDID sy-vline      INTO ld_text SEPARATED BY SPACE.

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