ABAP Select data from SAP table RFC_WCD_HDRWA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFC_WCD_HDRWA
*  INTO TABLE @DATA(IT_RFC_WCD_HDRWA2).
*--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_RFC_WCD_HDRWA INDEX 1 INTO DATA(WA_RFC_WCD_HDRWA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFC_WCD_HDRWA>-WCNR = 1.
<RFC_WCD_HDRWA>-STXT = 1.
<RFC_WCD_HDRWA>-OBJNR = 1.
<RFC_WCD_HDRWA>-SYSST = 1.
<RFC_WCD_HDRWA>-USRST = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFC_WCD_HDRWA-WCTYP, sy-vline,
  WA_RFC_WCD_HDRWA-WCTYPX, sy-vline,
  WA_RFC_WCD_HDRWA-WCUSE, sy-vline,
  WA_RFC_WCD_HDRWA-WCUSEX, sy-vline,
  WA_RFC_WCD_HDRWA-INGRP, sy-vline,
  WA_RFC_WCD_HDRWA-INGRPNAM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFC_WCD_HDRWA 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_RFC_WCD_HDRWA 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_RFC_WCD_HDRWA INTO WA_RFC_WCD_HDRWA.


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

*Conversion exit CUNIT, internal->external for field RCUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RFC_WCD_HDRWA-RCUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFC_WCD_HDRWA-RCUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TPLNR, internal->external for field TPLNR
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_RFC_WCD_HDRWA-TPLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFC_WCD_HDRWA-TPLNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ABPSP, internal->external for field PSPEL
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_RFC_WCD_HDRWA-PSPEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFC_WCD_HDRWA-PSPEL.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_RFC_WCD_HDRWA-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFC_WCD_HDRWA-VORNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REFKEY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFC_WCD_HDRWA-REFKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFC_WCD_HDRWA-REFKEY.
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_RFC_WCD_HDRWA_STR, 
WCNR TYPE STRING,
STXT TYPE STRING,
OBJNR TYPE STRING,
SYSST TYPE STRING,
USRST TYPE STRING,
WCTYP TYPE STRING,
WCTYPX TYPE STRING,
WCUSE TYPE STRING,
WCUSEX TYPE STRING,
INGRP TYPE STRING,
INGRPNAM TYPE STRING,
IWERK TYPE STRING,
IWERKTXT TYPE STRING,
WKCR TYPE STRING,
WKCRTXT TYPE STRING,
PLANT TYPE STRING,
BEGRU TYPE STRING,
BEGTX TYPE STRING,
DATEFR TYPE STRING,
TIMEFR TYPE STRING,
DATETO TYPE STRING,
TIMETO TYPE STRING,
ANLZU TYPE STRING,
ANLZUX TYPE STRING,
RCTIME TYPE STRING,
RCUNIT TYPE STRING,
PRIOK TYPE STRING,
PRIOKX TYPE STRING,
TPLNR TYPE STRING,
TPTXT TYPE STRING,
EQUNR TYPE STRING,
EQTXT TYPE STRING,
TRAIN TYPE STRING,
TRAINX TYPE STRING,
CRNAME TYPE STRING,
CRDATE TYPE STRING,
CRTIME TYPE STRING,
CHNAME TYPE STRING,
CHDATE TYPE STRING,
CHTIME TYPE STRING,
PSPEL TYPE STRING,
AUFNT TYPE STRING,
VORNR TYPE STRING,
BDATE TYPE STRING,
BTIME TYPE STRING,
EDATE TYPE STRING,
ETIME TYPE STRING,
TSDATE TYPE STRING,
TSTIME TYPE STRING,
TFDATE TYPE STRING,
TFTIME TYPE STRING,
ESDATE TYPE STRING,
ESTIME TYPE STRING,
EFDATE TYPE STRING,
EFTIME TYPE STRING,
LSDATE TYPE STRING,
LSTIME TYPE STRING,
LFDATE TYPE STRING,
LFTIME TYPE STRING,
PSDATE TYPE STRING,
PSTIME TYPE STRING,
PFDATE TYPE STRING,
PFTIME TYPE STRING,
ASDATE TYPE STRING,
ASTIME TYPE STRING,
AFDATE TYPE STRING,
AFTIME TYPE STRING,
SWERK TYPE STRING,
STORT TYPE STRING,
SRAUM TYPE STRING,
BEBER TYPE STRING,
SWERKTXT TYPE STRING,
STORTTXT TYPE STRING,
FINGTXT TYPE STRING,
TELETXT TYPE STRING,
ETAPE TYPE STRING,
ETAPEX TYPE STRING,
REFKEY TYPE STRING,
REFOBJ TYPE STRING,
LFLG TYPE STRING,
UNTGFLG TYPE STRING,
TGFLG TYPE STRING,
DOCFLG TYPE STRING,
PARFLG TYPE STRING,
CATFLG1 TYPE STRING,
CATFLG2 TYPE STRING,
LNKFLG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFC_WCD_HDRWA_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_RFC_WCD_HDRWA_STR-WCNR sy-vline 
WA_RFC_WCD_HDRWA_STR-STXT sy-vline 
WA_RFC_WCD_HDRWA_STR-OBJNR sy-vline 
WA_RFC_WCD_HDRWA_STR-SYSST sy-vline 
WA_RFC_WCD_HDRWA_STR-USRST sy-vline 
WA_RFC_WCD_HDRWA_STR-WCTYP sy-vline 
WA_RFC_WCD_HDRWA_STR-WCTYPX sy-vline 
WA_RFC_WCD_HDRWA_STR-WCUSE sy-vline 
WA_RFC_WCD_HDRWA_STR-WCUSEX sy-vline 
WA_RFC_WCD_HDRWA_STR-INGRP sy-vline 
WA_RFC_WCD_HDRWA_STR-INGRPNAM sy-vline 
WA_RFC_WCD_HDRWA_STR-IWERK sy-vline 
WA_RFC_WCD_HDRWA_STR-IWERKTXT sy-vline 
WA_RFC_WCD_HDRWA_STR-WKCR sy-vline 
WA_RFC_WCD_HDRWA_STR-WKCRTXT sy-vline 
WA_RFC_WCD_HDRWA_STR-PLANT sy-vline 
WA_RFC_WCD_HDRWA_STR-BEGRU sy-vline 
WA_RFC_WCD_HDRWA_STR-BEGTX sy-vline 
WA_RFC_WCD_HDRWA_STR-DATEFR sy-vline 
WA_RFC_WCD_HDRWA_STR-TIMEFR sy-vline 
WA_RFC_WCD_HDRWA_STR-DATETO sy-vline 
WA_RFC_WCD_HDRWA_STR-TIMETO sy-vline 
WA_RFC_WCD_HDRWA_STR-ANLZU sy-vline 
WA_RFC_WCD_HDRWA_STR-ANLZUX sy-vline 
WA_RFC_WCD_HDRWA_STR-RCTIME sy-vline 
WA_RFC_WCD_HDRWA_STR-RCUNIT sy-vline 
WA_RFC_WCD_HDRWA_STR-PRIOK sy-vline 
WA_RFC_WCD_HDRWA_STR-PRIOKX sy-vline 
WA_RFC_WCD_HDRWA_STR-TPLNR sy-vline 
WA_RFC_WCD_HDRWA_STR-TPTXT sy-vline 
WA_RFC_WCD_HDRWA_STR-EQUNR sy-vline 
WA_RFC_WCD_HDRWA_STR-EQTXT sy-vline 
WA_RFC_WCD_HDRWA_STR-TRAIN sy-vline 
WA_RFC_WCD_HDRWA_STR-TRAINX sy-vline 
WA_RFC_WCD_HDRWA_STR-CRNAME sy-vline 
WA_RFC_WCD_HDRWA_STR-CRDATE sy-vline 
WA_RFC_WCD_HDRWA_STR-CRTIME sy-vline 
WA_RFC_WCD_HDRWA_STR-CHNAME sy-vline 
WA_RFC_WCD_HDRWA_STR-CHDATE sy-vline 
WA_RFC_WCD_HDRWA_STR-CHTIME sy-vline 
WA_RFC_WCD_HDRWA_STR-PSPEL sy-vline 
WA_RFC_WCD_HDRWA_STR-AUFNT sy-vline 
WA_RFC_WCD_HDRWA_STR-VORNR sy-vline 
WA_RFC_WCD_HDRWA_STR-BDATE sy-vline 
WA_RFC_WCD_HDRWA_STR-BTIME sy-vline 
WA_RFC_WCD_HDRWA_STR-EDATE sy-vline 
WA_RFC_WCD_HDRWA_STR-ETIME sy-vline 
WA_RFC_WCD_HDRWA_STR-TSDATE sy-vline 
WA_RFC_WCD_HDRWA_STR-TSTIME sy-vline 
WA_RFC_WCD_HDRWA_STR-TFDATE sy-vline 
WA_RFC_WCD_HDRWA_STR-TFTIME sy-vline 
WA_RFC_WCD_HDRWA_STR-ESDATE sy-vline 
WA_RFC_WCD_HDRWA_STR-ESTIME sy-vline 
WA_RFC_WCD_HDRWA_STR-EFDATE sy-vline 
WA_RFC_WCD_HDRWA_STR-EFTIME sy-vline 
WA_RFC_WCD_HDRWA_STR-LSDATE sy-vline 
WA_RFC_WCD_HDRWA_STR-LSTIME sy-vline 
WA_RFC_WCD_HDRWA_STR-LFDATE sy-vline 
WA_RFC_WCD_HDRWA_STR-LFTIME sy-vline 
WA_RFC_WCD_HDRWA_STR-PSDATE sy-vline 
WA_RFC_WCD_HDRWA_STR-PSTIME sy-vline 
WA_RFC_WCD_HDRWA_STR-PFDATE sy-vline 
WA_RFC_WCD_HDRWA_STR-PFTIME sy-vline 
WA_RFC_WCD_HDRWA_STR-ASDATE sy-vline 
WA_RFC_WCD_HDRWA_STR-ASTIME sy-vline 
WA_RFC_WCD_HDRWA_STR-AFDATE sy-vline 
WA_RFC_WCD_HDRWA_STR-AFTIME sy-vline 
WA_RFC_WCD_HDRWA_STR-SWERK sy-vline 
WA_RFC_WCD_HDRWA_STR-STORT sy-vline 
WA_RFC_WCD_HDRWA_STR-SRAUM sy-vline 
WA_RFC_WCD_HDRWA_STR-BEBER sy-vline 
WA_RFC_WCD_HDRWA_STR-SWERKTXT sy-vline 
WA_RFC_WCD_HDRWA_STR-STORTTXT sy-vline 
WA_RFC_WCD_HDRWA_STR-FINGTXT sy-vline 
WA_RFC_WCD_HDRWA_STR-TELETXT sy-vline 
WA_RFC_WCD_HDRWA_STR-ETAPE sy-vline 
WA_RFC_WCD_HDRWA_STR-ETAPEX sy-vline 
WA_RFC_WCD_HDRWA_STR-REFKEY sy-vline 
WA_RFC_WCD_HDRWA_STR-REFOBJ sy-vline 
WA_RFC_WCD_HDRWA_STR-LFLG sy-vline 
WA_RFC_WCD_HDRWA_STR-UNTGFLG sy-vline 
WA_RFC_WCD_HDRWA_STR-TGFLG sy-vline 
WA_RFC_WCD_HDRWA_STR-DOCFLG sy-vline 
WA_RFC_WCD_HDRWA_STR-PARFLG sy-vline 
WA_RFC_WCD_HDRWA_STR-CATFLG1 sy-vline 
WA_RFC_WCD_HDRWA_STR-CATFLG2 sy-vline 
WA_RFC_WCD_HDRWA_STR-LNKFLG sy-vline      INTO ld_text SEPARATED BY SPACE.

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