ABAP Select data from SAP table RN2_COMPARTWS_BP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RN2_COMPARTWS_BP 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 RN2_COMPARTWS_BP. 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 RN2_COMPARTWS_BP 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_RN2_COMPARTWS_BP TYPE STANDARD TABLE OF RN2_COMPARTWS_BP,
      WA_RN2_COMPARTWS_BP TYPE RN2_COMPARTWS_BP,
      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: <RN2_COMPARTWS_BP> TYPE RN2_COMPARTWS_BP.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN2_COMPARTWS_BP.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN2_COMPARTWS_BP
  INTO TABLE IT_RN2_COMPARTWS_BP.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN2_COMPARTWS_BP
*  INTO TABLE @DATA(IT_RN2_COMPARTWS_BP2).
*--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_RN2_COMPARTWS_BP INDEX 1 INTO DATA(WA_RN2_COMPARTWS_BP2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN2_COMPARTWS_BP ASSIGNING <RN2_COMPARTWS_BP>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN2_COMPARTWS_BP>-CLNT = 1.
<RN2_COMPARTWS_BP>-COMM_PART = 1.
<RN2_COMPARTWS_BP>-WSCONF_DOC_OUT = 1.
<RN2_COMPARTWS_BP>-WSCONF_REPLY_OUT = 1.
<RN2_COMPARTWS_BP>-INBOUND_EMPLOYEE = 1.

ENDLOOP.

LOOP AT IT_RN2_COMPARTWS_BP INTO WA_RN2_COMPARTWS_BP.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN2_COMPARTWS_BP-INBOUND_OU, sy-vline,
  WA_RN2_COMPARTWS_BP-PARTNER, sy-vline,
  WA_RN2_COMPARTWS_BP-MANDT, sy-vline,
  WA_RN2_COMPARTWS_BP-GPART, sy-vline,
  WA_RN2_COMPARTWS_BP-INSTN, sy-vline,
  WA_RN2_COMPARTWS_BP-NAME1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN2_COMPARTWS_BP 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_RN2_COMPARTWS_BP 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_RN2_COMPARTWS_BP INTO WA_RN2_COMPARTWS_BP.


*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 INBOUND_EMPLOYEE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2_COMPARTWS_BP-INBOUND_EMPLOYEE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2_COMPARTWS_BP-INBOUND_EMPLOYEE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field INBOUND_OU
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2_COMPARTWS_BP-INBOUND_OU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2_COMPARTWS_BP-INBOUND_OU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2_COMPARTWS_BP-PARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2_COMPARTWS_BP-PARTNER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GPART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2_COMPARTWS_BP-GPART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2_COMPARTWS_BP-GPART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field INSTN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2_COMPARTWS_BP-INSTN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2_COMPARTWS_BP-INSTN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RN2_COMPARTWS_BP-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2_COMPARTWS_BP-SPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ADRNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2_COMPARTWS_BP-ADRNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2_COMPARTWS_BP-ADRNR.
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_RN2_COMPARTWS_BP_STR, 
CLNT TYPE STRING,
COMM_PART TYPE STRING,
WSCONF_DOC_OUT TYPE STRING,
WSCONF_REPLY_OUT TYPE STRING,
INBOUND_EMPLOYEE TYPE STRING,
INBOUND_OU TYPE STRING,
PARTNER TYPE STRING,
MANDT TYPE STRING,
GPART TYPE STRING,
INSTN TYPE STRING,
NAME1 TYPE STRING,
NAM1S TYPE STRING,
NAME2 TYPE STRING,
NAM2S TYPE STRING,
NAME3 TYPE STRING,
KNAME TYPE STRING,
NPKZ TYPE STRING,
SPRAS TYPE STRING,
ANRED TYPE STRING,
TITEL TYPE STRING,
NAMZU TYPE STRING,
VORSW TYPE STRING,
GSCHL TYPE STRING,
LAND TYPE STRING,
REGIO TYPE STRING,
PSTLZ TYPE STRING,
PFACH TYPE STRING,
PLZPF TYPE STRING,
ORT TYPE STRING,
ORTS TYPE STRING,
ORT2 TYPE STRING,
STRAS TYPE STRING,
TELFN TYPE STRING,
TELFX TYPE STRING,
TELEX TYPE STRING,
KZTXT TYPE STRING,
LGTXT TYPE STRING,
LOEKZ TYPE STRING,
LOUSR TYPE STRING,
LODAT TYPE STRING,
SPVON TYPE STRING,
SPBIS TYPE STRING,
ERDAT TYPE STRING,
ERUSR TYPE STRING,
UPDAT TYPE STRING,
UPUSR TYPE STRING,
GPAR TYPE STRING,
PERS TYPE STRING,
KOSTR TYPE STRING,
DEBIT TYPE STRING,
ARBTG TYPE STRING,
KRKHS TYPE STRING,
KNAMS TYPE STRING,
SPTXT TYPE STRING,
SPTKZ TYPE STRING,
ADRNR TYPE STRING,
ADROB TYPE STRING,
STCD1 TYPE STRING,
PNUMB TYPE STRING,
PARTNER_GUID TYPE STRING,
TITEL1 TYPE STRING,
MIG_DONE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN2_COMPARTWS_BP_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_RN2_COMPARTWS_BP_STR-CLNT sy-vline 
WA_RN2_COMPARTWS_BP_STR-COMM_PART sy-vline 
WA_RN2_COMPARTWS_BP_STR-WSCONF_DOC_OUT sy-vline 
WA_RN2_COMPARTWS_BP_STR-WSCONF_REPLY_OUT sy-vline 
WA_RN2_COMPARTWS_BP_STR-INBOUND_EMPLOYEE sy-vline 
WA_RN2_COMPARTWS_BP_STR-INBOUND_OU sy-vline 
WA_RN2_COMPARTWS_BP_STR-PARTNER sy-vline 
WA_RN2_COMPARTWS_BP_STR-MANDT sy-vline 
WA_RN2_COMPARTWS_BP_STR-GPART sy-vline 
WA_RN2_COMPARTWS_BP_STR-INSTN sy-vline 
WA_RN2_COMPARTWS_BP_STR-NAME1 sy-vline 
WA_RN2_COMPARTWS_BP_STR-NAM1S sy-vline 
WA_RN2_COMPARTWS_BP_STR-NAME2 sy-vline 
WA_RN2_COMPARTWS_BP_STR-NAM2S sy-vline 
WA_RN2_COMPARTWS_BP_STR-NAME3 sy-vline 
WA_RN2_COMPARTWS_BP_STR-KNAME sy-vline 
WA_RN2_COMPARTWS_BP_STR-NPKZ sy-vline 
WA_RN2_COMPARTWS_BP_STR-SPRAS sy-vline 
WA_RN2_COMPARTWS_BP_STR-ANRED sy-vline 
WA_RN2_COMPARTWS_BP_STR-TITEL sy-vline 
WA_RN2_COMPARTWS_BP_STR-NAMZU sy-vline 
WA_RN2_COMPARTWS_BP_STR-VORSW sy-vline 
WA_RN2_COMPARTWS_BP_STR-GSCHL sy-vline 
WA_RN2_COMPARTWS_BP_STR-LAND sy-vline 
WA_RN2_COMPARTWS_BP_STR-REGIO sy-vline 
WA_RN2_COMPARTWS_BP_STR-PSTLZ sy-vline 
WA_RN2_COMPARTWS_BP_STR-PFACH sy-vline 
WA_RN2_COMPARTWS_BP_STR-PLZPF sy-vline 
WA_RN2_COMPARTWS_BP_STR-ORT sy-vline 
WA_RN2_COMPARTWS_BP_STR-ORTS sy-vline 
WA_RN2_COMPARTWS_BP_STR-ORT2 sy-vline 
WA_RN2_COMPARTWS_BP_STR-STRAS sy-vline 
WA_RN2_COMPARTWS_BP_STR-TELFN sy-vline 
WA_RN2_COMPARTWS_BP_STR-TELFX sy-vline 
WA_RN2_COMPARTWS_BP_STR-TELEX sy-vline 
WA_RN2_COMPARTWS_BP_STR-KZTXT sy-vline 
WA_RN2_COMPARTWS_BP_STR-LGTXT sy-vline 
WA_RN2_COMPARTWS_BP_STR-LOEKZ sy-vline 
WA_RN2_COMPARTWS_BP_STR-LOUSR sy-vline 
WA_RN2_COMPARTWS_BP_STR-LODAT sy-vline 
WA_RN2_COMPARTWS_BP_STR-SPVON sy-vline 
WA_RN2_COMPARTWS_BP_STR-SPBIS sy-vline 
WA_RN2_COMPARTWS_BP_STR-ERDAT sy-vline 
WA_RN2_COMPARTWS_BP_STR-ERUSR sy-vline 
WA_RN2_COMPARTWS_BP_STR-UPDAT sy-vline 
WA_RN2_COMPARTWS_BP_STR-UPUSR sy-vline 
WA_RN2_COMPARTWS_BP_STR-GPAR sy-vline 
WA_RN2_COMPARTWS_BP_STR-PERS sy-vline 
WA_RN2_COMPARTWS_BP_STR-KOSTR sy-vline 
WA_RN2_COMPARTWS_BP_STR-DEBIT sy-vline 
WA_RN2_COMPARTWS_BP_STR-ARBTG sy-vline 
WA_RN2_COMPARTWS_BP_STR-KRKHS sy-vline 
WA_RN2_COMPARTWS_BP_STR-KNAMS sy-vline 
WA_RN2_COMPARTWS_BP_STR-SPTXT sy-vline 
WA_RN2_COMPARTWS_BP_STR-SPTKZ sy-vline 
WA_RN2_COMPARTWS_BP_STR-ADRNR sy-vline 
WA_RN2_COMPARTWS_BP_STR-ADROB sy-vline 
WA_RN2_COMPARTWS_BP_STR-STCD1 sy-vline 
WA_RN2_COMPARTWS_BP_STR-PNUMB sy-vline 
WA_RN2_COMPARTWS_BP_STR-PARTNER_GUID sy-vline 
WA_RN2_COMPARTWS_BP_STR-TITEL1 sy-vline 
WA_RN2_COMPARTWS_BP_STR-MIG_DONE sy-vline      INTO ld_text SEPARATED BY SPACE.

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