ABAP Select data from SAP table WCVW 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 WCVW 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 WCVW. 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 WCVW 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_WCVW TYPE STANDARD TABLE OF WCVW,
      WA_WCVW TYPE WCVW,
      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: <WCVW> TYPE WCVW.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WCVW
*  INTO TABLE @DATA(IT_WCVW2).
*--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_WCVW INDEX 1 INTO DATA(WA_WCVW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WCVW>-MANDT = 1.
<WCVW>-WAPNR = 1.
<WCVW>-OBJNR = 1.
<WCVW>-WAPUSE = 1.
<WCVW>-STXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WCVW-LFLG, sy-vline,
  WA_WCVW-DELFLG, sy-vline,
  WA_WCVW-REQUALFLG, sy-vline,
  WA_WCVW-CATFLG1, sy-vline,
  WA_WCVW-CATFLG2, sy-vline,
  WA_WCVW-INGRP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WCVW 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_WCVW 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_WCVW INTO WA_WCVW.


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

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

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

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

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

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

*Conversion exit TPLNR, internal->external for field TPLNR_INT
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_WCVW-TPLNR_INT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCVW-TPLNR_INT.
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_WCVW_STR, 
MANDT TYPE STRING,
WAPNR TYPE STRING,
OBJNR TYPE STRING,
WAPUSE TYPE STRING,
STXT TYPE STRING,
LFLG TYPE STRING,
DELFLG TYPE STRING,
REQUALFLG TYPE STRING,
CATFLG1 TYPE STRING,
CATFLG2 TYPE STRING,
INGRP TYPE STRING,
IWERK TYPE STRING,
WKCRTYP TYPE STRING,
WKCRID TYPE STRING,
BEGRU TYPE STRING,
DATEFR TYPE STRING,
TIMEFR TYPE STRING,
DATETO TYPE STRING,
TIMETO TYPE STRING,
ANLZU TYPE STRING,
RCTIME TYPE STRING,
RCUNIT TYPE STRING,
PRIOK TYPE STRING,
EQUNR TYPE STRING,
LNKFLG TYPE STRING,
TRAIN 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,
ETAPE TYPE STRING,
DOCFLG TYPE STRING,
WAPSTSMA TYPE STRING,
REFOBJ TYPE STRING,
REMARKFLG1 TYPE STRING,
REMARKFLG2 TYPE STRING,
TPLNR TYPE STRING,
TPLNR_INT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WCVW_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_WCVW_STR-MANDT sy-vline 
WA_WCVW_STR-WAPNR sy-vline 
WA_WCVW_STR-OBJNR sy-vline 
WA_WCVW_STR-WAPUSE sy-vline 
WA_WCVW_STR-STXT sy-vline 
WA_WCVW_STR-LFLG sy-vline 
WA_WCVW_STR-DELFLG sy-vline 
WA_WCVW_STR-REQUALFLG sy-vline 
WA_WCVW_STR-CATFLG1 sy-vline 
WA_WCVW_STR-CATFLG2 sy-vline 
WA_WCVW_STR-INGRP sy-vline 
WA_WCVW_STR-IWERK sy-vline 
WA_WCVW_STR-WKCRTYP sy-vline 
WA_WCVW_STR-WKCRID sy-vline 
WA_WCVW_STR-BEGRU sy-vline 
WA_WCVW_STR-DATEFR sy-vline 
WA_WCVW_STR-TIMEFR sy-vline 
WA_WCVW_STR-DATETO sy-vline 
WA_WCVW_STR-TIMETO sy-vline 
WA_WCVW_STR-ANLZU sy-vline 
WA_WCVW_STR-RCTIME sy-vline 
WA_WCVW_STR-RCUNIT sy-vline 
WA_WCVW_STR-PRIOK sy-vline 
WA_WCVW_STR-EQUNR sy-vline 
WA_WCVW_STR-LNKFLG sy-vline 
WA_WCVW_STR-TRAIN sy-vline 
WA_WCVW_STR-CRNAME sy-vline 
WA_WCVW_STR-CRDATE sy-vline 
WA_WCVW_STR-CRTIME sy-vline 
WA_WCVW_STR-CHNAME sy-vline 
WA_WCVW_STR-CHDATE sy-vline 
WA_WCVW_STR-CHTIME sy-vline 
WA_WCVW_STR-PSPEL sy-vline 
WA_WCVW_STR-AUFNT sy-vline 
WA_WCVW_STR-VORNR sy-vline 
WA_WCVW_STR-BDATE sy-vline 
WA_WCVW_STR-BTIME sy-vline 
WA_WCVW_STR-EDATE sy-vline 
WA_WCVW_STR-ETIME sy-vline 
WA_WCVW_STR-TSDATE sy-vline 
WA_WCVW_STR-TSTIME sy-vline 
WA_WCVW_STR-TFDATE sy-vline 
WA_WCVW_STR-TFTIME sy-vline 
WA_WCVW_STR-ESDATE sy-vline 
WA_WCVW_STR-ESTIME sy-vline 
WA_WCVW_STR-EFDATE sy-vline 
WA_WCVW_STR-EFTIME sy-vline 
WA_WCVW_STR-LSDATE sy-vline 
WA_WCVW_STR-LSTIME sy-vline 
WA_WCVW_STR-LFDATE sy-vline 
WA_WCVW_STR-LFTIME sy-vline 
WA_WCVW_STR-PSDATE sy-vline 
WA_WCVW_STR-PSTIME sy-vline 
WA_WCVW_STR-PFDATE sy-vline 
WA_WCVW_STR-PFTIME sy-vline 
WA_WCVW_STR-ASDATE sy-vline 
WA_WCVW_STR-ASTIME sy-vline 
WA_WCVW_STR-AFDATE sy-vline 
WA_WCVW_STR-AFTIME sy-vline 
WA_WCVW_STR-ETAPE sy-vline 
WA_WCVW_STR-DOCFLG sy-vline 
WA_WCVW_STR-WAPSTSMA sy-vline 
WA_WCVW_STR-REFOBJ sy-vline 
WA_WCVW_STR-REMARKFLG1 sy-vline 
WA_WCVW_STR-REMARKFLG2 sy-vline 
WA_WCVW_STR-TPLNR sy-vline 
WA_WCVW_STR-TPLNR_INT sy-vline      INTO ld_text SEPARATED BY SPACE.

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