ABAP Select data from SAP table RFC_WCD_ITMWA 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_ITMWA 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_ITMWA. 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_ITMWA 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_ITMWA TYPE STANDARD TABLE OF RFC_WCD_ITMWA,
      WA_RFC_WCD_ITMWA TYPE RFC_WCD_ITMWA,
      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_ITMWA> TYPE RFC_WCD_ITMWA.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFC_WCD_ITMWA
*  INTO TABLE @DATA(IT_RFC_WCD_ITMWA2).
*--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_ITMWA INDEX 1 INTO DATA(WA_RFC_WCD_ITMWA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFC_WCD_ITMWA>-OBJNR = 1.
<RFC_WCD_ITMWA>-SEQ = 1.
<RFC_WCD_ITMWA>-CCTYP = 1.
<RFC_WCD_ITMWA>-CCOBJ = 1.
<RFC_WCD_ITMWA>-CCOBJNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFC_WCD_ITMWA-STXT, sy-vline,
  WA_RFC_WCD_ITMWA-TGGRP, sy-vline,
  WA_RFC_WCD_ITMWA-TGSTEP, sy-vline,
  WA_RFC_WCD_ITMWA-TGPROC, sy-vline,
  WA_RFC_WCD_ITMWA-TGTYP, sy-vline,
  WA_RFC_WCD_ITMWA-TGSEQ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFC_WCD_ITMWA 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_ITMWA 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_ITMWA INTO WA_RFC_WCD_ITMWA.


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

*Conversion exit ALPHA, internal->external for field UNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFC_WCD_ITMWA-UNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFC_WCD_ITMWA-UNNR.
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_ITMWA_STR, 
OBJNR TYPE STRING,
SEQ TYPE STRING,
CCTYP TYPE STRING,
CCOBJ TYPE STRING,
CCOBJNR TYPE STRING,
STXT TYPE STRING,
TGGRP TYPE STRING,
TGSTEP TYPE STRING,
TGPROC TYPE STRING,
TGTYP TYPE STRING,
TGSEQ TYPE STRING,
TGTXT TYPE STRING,
UNSTEP TYPE STRING,
UNPROC TYPE STRING,
UNTYP TYPE STRING,
UNSEQ TYPE STRING,
UNTXT TYPE STRING,
PHBLFLG TYPE STRING,
PHBLTYP TYPE STRING,
PHBLNR TYPE STRING,
TGFLG TYPE STRING,
TGFORM TYPE STRING,
TGNR TYPE STRING,
UNFORM TYPE STRING,
UNNR TYPE STRING,
LOCATION TYPE STRING,
CONTROL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFC_WCD_ITMWA_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_ITMWA_STR-OBJNR sy-vline 
WA_RFC_WCD_ITMWA_STR-SEQ sy-vline 
WA_RFC_WCD_ITMWA_STR-CCTYP sy-vline 
WA_RFC_WCD_ITMWA_STR-CCOBJ sy-vline 
WA_RFC_WCD_ITMWA_STR-CCOBJNR sy-vline 
WA_RFC_WCD_ITMWA_STR-STXT sy-vline 
WA_RFC_WCD_ITMWA_STR-TGGRP sy-vline 
WA_RFC_WCD_ITMWA_STR-TGSTEP sy-vline 
WA_RFC_WCD_ITMWA_STR-TGPROC sy-vline 
WA_RFC_WCD_ITMWA_STR-TGTYP sy-vline 
WA_RFC_WCD_ITMWA_STR-TGSEQ sy-vline 
WA_RFC_WCD_ITMWA_STR-TGTXT sy-vline 
WA_RFC_WCD_ITMWA_STR-UNSTEP sy-vline 
WA_RFC_WCD_ITMWA_STR-UNPROC sy-vline 
WA_RFC_WCD_ITMWA_STR-UNTYP sy-vline 
WA_RFC_WCD_ITMWA_STR-UNSEQ sy-vline 
WA_RFC_WCD_ITMWA_STR-UNTXT sy-vline 
WA_RFC_WCD_ITMWA_STR-PHBLFLG sy-vline 
WA_RFC_WCD_ITMWA_STR-PHBLTYP sy-vline 
WA_RFC_WCD_ITMWA_STR-PHBLNR sy-vline 
WA_RFC_WCD_ITMWA_STR-TGFLG sy-vline 
WA_RFC_WCD_ITMWA_STR-TGFORM sy-vline 
WA_RFC_WCD_ITMWA_STR-TGNR sy-vline 
WA_RFC_WCD_ITMWA_STR-UNFORM sy-vline 
WA_RFC_WCD_ITMWA_STR-UNNR sy-vline 
WA_RFC_WCD_ITMWA_STR-LOCATION sy-vline 
WA_RFC_WCD_ITMWA_STR-CONTROL sy-vline      INTO ld_text SEPARATED BY SPACE.

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