ABAP Select data from SAP table RCWKP into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RCWKP 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 RCWKP. 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 RCWKP 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_RCWKP TYPE STANDARD TABLE OF RCWKP,
      WA_RCWKP TYPE RCWKP,
      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: <RCWKP> TYPE RCWKP.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCWKP
*  INTO TABLE @DATA(IT_RCWKP2).
*--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_RCWKP INDEX 1 INTO DATA(WA_RCWKP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCWKP>-DANEBEN = 1.
<RCWKP>-DARUNTER = 1.
<RCWKP>-STUFE_DAN = 1.
<RCWKP>-STUFE_DAR = 1.
<RCWKP>-VORLAGE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCWKP-VORSPSP, sy-vline,
  WA_RCWKP-SUCHEN, sy-vline,
  WA_RCWKP-ERSETZEN, sy-vline,
  WA_RCWKP-INCL_ROOT, sy-vline,
  WA_RCWKP-EXCL_ROOT, sy-vline,
  WA_RCWKP-POSIT_RI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCWKP 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_RCWKP 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_RCWKP INTO WA_RCWKP.


*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 ABPSN, internal->external for field DANEBEN
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_RCWKP-DANEBEN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCWKP-DANEBEN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field DARUNTER
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_RCWKP-DARUNTER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCWKP-DARUNTER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field VORLAGE
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_RCWKP-VORLAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCWKP-VORLAGE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field VORSPSP
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_RCWKP-VORSPSP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCWKP-VORSPSP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field VORBELEGEN
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_RCWKP-VORBELEGEN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCWKP-VORBELEGEN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field VSPSPID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_RCWKP-VSPSPID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCWKP-VSPSPID.
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_RCWKP_STR, 
DANEBEN TYPE STRING,
DARUNTER TYPE STRING,
STUFE_DAN TYPE STRING,
STUFE_DAR TYPE STRING,
VORLAGE TYPE STRING,
VORSPSP TYPE STRING,
SUCHEN TYPE STRING,
ERSETZEN TYPE STRING,
INCL_ROOT TYPE STRING,
EXCL_ROOT TYPE STRING,
POSIT_RI TYPE STRING,
POSIT_LE TYPE STRING,
VORBELEGEN TYPE STRING,
PROJ_GEN TYPE STRING,
AUS_DEF TYPE STRING,
ANZAHL TYPE STRING,
VSNMR TYPE STRING,
CP_VSNMR TYPE STRING,
VSPSPID TYPE STRING,
EXCL_MLST TYPE STRING,
EXCL_PSTX TYPE STRING,
COPY_PSP_DOC TYPE STRING,
PROFILE_OF_TEMPLATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCWKP_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_RCWKP_STR-DANEBEN sy-vline 
WA_RCWKP_STR-DARUNTER sy-vline 
WA_RCWKP_STR-STUFE_DAN sy-vline 
WA_RCWKP_STR-STUFE_DAR sy-vline 
WA_RCWKP_STR-VORLAGE sy-vline 
WA_RCWKP_STR-VORSPSP sy-vline 
WA_RCWKP_STR-SUCHEN sy-vline 
WA_RCWKP_STR-ERSETZEN sy-vline 
WA_RCWKP_STR-INCL_ROOT sy-vline 
WA_RCWKP_STR-EXCL_ROOT sy-vline 
WA_RCWKP_STR-POSIT_RI sy-vline 
WA_RCWKP_STR-POSIT_LE sy-vline 
WA_RCWKP_STR-VORBELEGEN sy-vline 
WA_RCWKP_STR-PROJ_GEN sy-vline 
WA_RCWKP_STR-AUS_DEF sy-vline 
WA_RCWKP_STR-ANZAHL sy-vline 
WA_RCWKP_STR-VSNMR sy-vline 
WA_RCWKP_STR-CP_VSNMR sy-vline 
WA_RCWKP_STR-VSPSPID sy-vline 
WA_RCWKP_STR-EXCL_MLST sy-vline 
WA_RCWKP_STR-EXCL_PSTX sy-vline 
WA_RCWKP_STR-COPY_PSP_DOC sy-vline 
WA_RCWKP_STR-PROFILE_OF_TEMPLATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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