ABAP Select data from SAP table RN2DSWORKLIST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RN2DSWORKLIST 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 RN2DSWORKLIST. 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 RN2DSWORKLIST 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_RN2DSWORKLIST TYPE STANDARD TABLE OF RN2DSWORKLIST,
      WA_RN2DSWORKLIST TYPE RN2DSWORKLIST,
      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: <RN2DSWORKLIST> TYPE RN2DSWORKLIST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN2DSWORKLIST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN2DSWORKLIST
  INTO TABLE IT_RN2DSWORKLIST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN2DSWORKLIST
*  INTO TABLE @DATA(IT_RN2DSWORKLIST2).
*--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_RN2DSWORKLIST INDEX 1 INTO DATA(WA_RN2DSWORKLIST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN2DSWORKLIST ASSIGNING <RN2DSWORKLIST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN2DSWORKLIST>-DATUM = 1.
<RN2DSWORKLIST>-ORGKB = 1.
<RN2DSWORKLIST>-ZEIT = 1.
<RN2DSWORKLIST>-PATNNAME = 1.
<RN2DSWORKLIST>-PATVNAME = 1.

ENDLOOP.

LOOP AT IT_RN2DSWORKLIST INTO WA_RN2DSWORKLIST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN2DSWORKLIST-GEBDATUM, sy-vline,
  WA_RN2DSWORKLIST-GESCHL, sy-vline,
  WA_RN2DSWORKLIST-PATNAME, sy-vline,
  WA_RN2DSWORKLIST-TITEL, sy-vline,
  WA_RN2DSWORKLIST-NAMZU, sy-vline,
  WA_RN2DSWORKLIST-VORSW, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN2DSWORKLIST 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_RN2DSWORKLIST 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_RN2DSWORKLIST INTO WA_RN2DSWORKLIST.


*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 ANFVMA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2DSWORKLIST-ANFVMA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2DSWORKLIST-ANFVMA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EINRI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2DSWORKLIST-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2DSWORKLIST-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PATNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2DSWORKLIST-PATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2DSWORKLIST-PATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PAPID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2DSWORKLIST-PAPID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2DSWORKLIST-PAPID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FALNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2DSWORKLIST-FALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2DSWORKLIST-FALNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LNRLS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2DSWORKLIST-LNRLS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2DSWORKLIST-LNRLS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AKTSTATPAT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2DSWORKLIST-AKTSTATPAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2DSWORKLIST-AKTSTATPAT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ERBOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2DSWORKLIST-ERBOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2DSWORKLIST-ERBOE.
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_RN2DSWORKLIST_STR, 
DATUM TYPE STRING,
ORGKB TYPE STRING,
ZEIT TYPE STRING,
PATNNAME TYPE STRING,
PATVNAME TYPE STRING,
GEBDATUM TYPE STRING,
GESCHL TYPE STRING,
PATNAME TYPE STRING,
TITEL TYPE STRING,
NAMZU TYPE STRING,
VORSW TYPE STRING,
ANFVMA TYPE STRING,
PRIANF TYPE STRING,
PRIANFTX TYPE STRING,
EINRI TYPE STRING,
PATNR TYPE STRING,
PAPID TYPE STRING,
FALNR TYPE STRING,
LFDBW TYPE STRING,
LNRLS TYPE STRING,
LEITX TYPE STRING,
AKTSTATPAT TYPE STRING,
FLG_TERMIN TYPE STRING,
FLG_WTERMIN TYPE STRING,
ANFID TYPE STRING,
VKGID TYPE STRING,
ERBOE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN2DSWORKLIST_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_RN2DSWORKLIST_STR-DATUM sy-vline 
WA_RN2DSWORKLIST_STR-ORGKB sy-vline 
WA_RN2DSWORKLIST_STR-ZEIT sy-vline 
WA_RN2DSWORKLIST_STR-PATNNAME sy-vline 
WA_RN2DSWORKLIST_STR-PATVNAME sy-vline 
WA_RN2DSWORKLIST_STR-GEBDATUM sy-vline 
WA_RN2DSWORKLIST_STR-GESCHL sy-vline 
WA_RN2DSWORKLIST_STR-PATNAME sy-vline 
WA_RN2DSWORKLIST_STR-TITEL sy-vline 
WA_RN2DSWORKLIST_STR-NAMZU sy-vline 
WA_RN2DSWORKLIST_STR-VORSW sy-vline 
WA_RN2DSWORKLIST_STR-ANFVMA sy-vline 
WA_RN2DSWORKLIST_STR-PRIANF sy-vline 
WA_RN2DSWORKLIST_STR-PRIANFTX sy-vline 
WA_RN2DSWORKLIST_STR-EINRI sy-vline 
WA_RN2DSWORKLIST_STR-PATNR sy-vline 
WA_RN2DSWORKLIST_STR-PAPID sy-vline 
WA_RN2DSWORKLIST_STR-FALNR sy-vline 
WA_RN2DSWORKLIST_STR-LFDBW sy-vline 
WA_RN2DSWORKLIST_STR-LNRLS sy-vline 
WA_RN2DSWORKLIST_STR-LEITX sy-vline 
WA_RN2DSWORKLIST_STR-AKTSTATPAT sy-vline 
WA_RN2DSWORKLIST_STR-FLG_TERMIN sy-vline 
WA_RN2DSWORKLIST_STR-FLG_WTERMIN sy-vline 
WA_RN2DSWORKLIST_STR-ANFID sy-vline 
WA_RN2DSWORKLIST_STR-VKGID sy-vline 
WA_RN2DSWORKLIST_STR-ERBOE sy-vline      INTO ld_text SEPARATED BY SPACE.

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