ABAP Select data from SAP table RPCLSTNS_LIST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RPCLSTNS_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 RPCLSTNS_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 RPCLSTNS_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_RPCLSTNS_LIST TYPE STANDARD TABLE OF RPCLSTNS_LIST,
      WA_RPCLSTNS_LIST TYPE RPCLSTNS_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: <RPCLSTNS_LIST> TYPE RPCLSTNS_LIST.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RPCLSTNS_LIST
*  INTO TABLE @DATA(IT_RPCLSTNS_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_RPCLSTNS_LIST INDEX 1 INTO DATA(WA_RPCLSTNS_LIST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RPCLSTNS_LIST>-PERNR = 1.
<RPCLSTNS_LIST>-PABRJ = 1.
<RPCLSTNS_LIST>-PABRP = 1.
<RPCLSTNS_LIST>-ZUDMO = 1.
<RPCLSTNS_LIST>-ZUDJA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RPCLSTNS_LIST-ZUJAR, sy-vline,
  WA_RPCLSTNS_LIST-GFIMO, sy-vline,
  WA_RPCLSTNS_LIST-SRGMO, sy-vline,
  WA_RPCLSTNS_LIST-BIURL, sy-vline,
  WA_RPCLSTNS_LIST-NSVMO, sy-vline,
  WA_RPCLSTNS_LIST-ANZU1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RPCLSTNS_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_RPCLSTNS_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_RPCLSTNS_LIST INTO WA_RPCLSTNS_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 GJAHR, internal->external for field PABRJ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RPCLSTNS_LIST-PABRJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RPCLSTNS_LIST-PABRJ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field URLJJ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RPCLSTNS_LIST-URLJJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RPCLSTNS_LIST-URLJJ.
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_RPCLSTNS_LIST_STR, 
PERNR TYPE STRING,
PABRJ TYPE STRING,
PABRP TYPE STRING,
ZUDMO TYPE STRING,
ZUDJA TYPE STRING,
ZUJAR TYPE STRING,
GFIMO TYPE STRING,
SRGMO TYPE STRING,
BIURL TYPE STRING,
NSVMO TYPE STRING,
ANZU1 TYPE STRING,
ANZUA TYPE STRING,
ANZUB TYPE STRING,
ANZU0 TYPE STRING,
ANNS1 TYPE STRING,
ANNSB TYPE STRING,
KTOV1 TYPE STRING,
KTNSB TYPE STRING,
KTNS1 TYPE STRING,
KTZUB TYPE STRING,
KTOV2 TYPE STRING,
KTOV3 TYPE STRING,
URLJJ TYPE STRING,
NSMON TYPE STRING,
SAPRL TYPE STRING,
NUMBER TYPE STRING,
UNAME TYPE STRING,
DATUM TYPE STRING,
UZEIT TYPE STRING,
PGMID TYPE STRING,
SCHEM TYPE STRING,
PERNR_TXT TYPE STRING,
NACHN TYPE STRING,
VORNA TYPE STRING,
FPPER TYPE STRING,
KTOV0 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RPCLSTNS_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_RPCLSTNS_LIST_STR-PERNR sy-vline 
WA_RPCLSTNS_LIST_STR-PABRJ sy-vline 
WA_RPCLSTNS_LIST_STR-PABRP sy-vline 
WA_RPCLSTNS_LIST_STR-ZUDMO sy-vline 
WA_RPCLSTNS_LIST_STR-ZUDJA sy-vline 
WA_RPCLSTNS_LIST_STR-ZUJAR sy-vline 
WA_RPCLSTNS_LIST_STR-GFIMO sy-vline 
WA_RPCLSTNS_LIST_STR-SRGMO sy-vline 
WA_RPCLSTNS_LIST_STR-BIURL sy-vline 
WA_RPCLSTNS_LIST_STR-NSVMO sy-vline 
WA_RPCLSTNS_LIST_STR-ANZU1 sy-vline 
WA_RPCLSTNS_LIST_STR-ANZUA sy-vline 
WA_RPCLSTNS_LIST_STR-ANZUB sy-vline 
WA_RPCLSTNS_LIST_STR-ANZU0 sy-vline 
WA_RPCLSTNS_LIST_STR-ANNS1 sy-vline 
WA_RPCLSTNS_LIST_STR-ANNSB sy-vline 
WA_RPCLSTNS_LIST_STR-KTOV1 sy-vline 
WA_RPCLSTNS_LIST_STR-KTNSB sy-vline 
WA_RPCLSTNS_LIST_STR-KTNS1 sy-vline 
WA_RPCLSTNS_LIST_STR-KTZUB sy-vline 
WA_RPCLSTNS_LIST_STR-KTOV2 sy-vline 
WA_RPCLSTNS_LIST_STR-KTOV3 sy-vline 
WA_RPCLSTNS_LIST_STR-URLJJ sy-vline 
WA_RPCLSTNS_LIST_STR-NSMON sy-vline 
WA_RPCLSTNS_LIST_STR-SAPRL sy-vline 
WA_RPCLSTNS_LIST_STR-NUMBER sy-vline 
WA_RPCLSTNS_LIST_STR-UNAME sy-vline 
WA_RPCLSTNS_LIST_STR-DATUM sy-vline 
WA_RPCLSTNS_LIST_STR-UZEIT sy-vline 
WA_RPCLSTNS_LIST_STR-PGMID sy-vline 
WA_RPCLSTNS_LIST_STR-SCHEM sy-vline 
WA_RPCLSTNS_LIST_STR-PERNR_TXT sy-vline 
WA_RPCLSTNS_LIST_STR-NACHN sy-vline 
WA_RPCLSTNS_LIST_STR-VORNA sy-vline 
WA_RPCLSTNS_LIST_STR-FPPER sy-vline 
WA_RPCLSTNS_LIST_STR-KTOV0 sy-vline      INTO ld_text SEPARATED BY SPACE.

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