ABAP Select data from SAP table CVS_WU into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CVS_WU
*  INTO TABLE @DATA(IT_CVS_WU2).
*--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_CVS_WU INDEX 1 INTO DATA(WA_CVS_WU2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CVS_WU>-TYPE = 1.
<CVS_WU>-NAME = 1.
<CVS_WU>-CLASS = 1.
<CVS_WU>-PB_CNT_CUM = 1.
<CVS_WU>-PB_RBX_CUM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CVS_WU-PB_CNT_CUR, sy-vline,
  WA_CVS_WU-PB_RBX_CUR, sy-vline,
  WA_CVS_WU-CHANGE_COUNT, sy-vline,
  WA_CVS_WU-STATEMENT_COUNT, sy-vline,
  WA_CVS_WU-BRANCH_COUNT, sy-vline,
  WA_CVS_WU-TESTED_ST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CVS_WU 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_CVS_WU 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_CVS_WU INTO WA_CVS_WU.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_CVS_WU_STR, 
TYPE TYPE STRING,
NAME TYPE STRING,
CLASS TYPE STRING,
PB_CNT_CUM TYPE STRING,
PB_RBX_CUM TYPE STRING,
PB_CNT_CUR TYPE STRING,
PB_RBX_CUR TYPE STRING,
CHANGE_COUNT TYPE STRING,
STATEMENT_COUNT TYPE STRING,
BRANCH_COUNT TYPE STRING,
TESTED_ST TYPE STRING,
TESTED_ST_CUM TYPE STRING,
TESTED_BRCH TYPE STRING,
TESTED_BRCH_CUM TYPE STRING,
PB_CNT_CUM_NOT_NULL TYPE STRING,
PB_RBX_CUM_NOT_NULL TYPE STRING,
PB_CNT_CUR_NOT_NULL TYPE STRING,
PB_RBX_CUR_NOT_NULL TYPE STRING,
COVRESET1_NOT_NULL TYPE STRING,
UNICODE TYPE STRING,
TESTED TYPE STRING,
LED TYPE STRING,
ICON TYPE STRING,
SRC_KEY TYPE STRING,
COVRESET1 TYPE STRING,
COVRESET2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CVS_WU_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_CVS_WU_STR-TYPE sy-vline 
WA_CVS_WU_STR-NAME sy-vline 
WA_CVS_WU_STR-CLASS sy-vline 
WA_CVS_WU_STR-PB_CNT_CUM sy-vline 
WA_CVS_WU_STR-PB_RBX_CUM sy-vline 
WA_CVS_WU_STR-PB_CNT_CUR sy-vline 
WA_CVS_WU_STR-PB_RBX_CUR sy-vline 
WA_CVS_WU_STR-CHANGE_COUNT sy-vline 
WA_CVS_WU_STR-STATEMENT_COUNT sy-vline 
WA_CVS_WU_STR-BRANCH_COUNT sy-vline 
WA_CVS_WU_STR-TESTED_ST sy-vline 
WA_CVS_WU_STR-TESTED_ST_CUM sy-vline 
WA_CVS_WU_STR-TESTED_BRCH sy-vline 
WA_CVS_WU_STR-TESTED_BRCH_CUM sy-vline 
WA_CVS_WU_STR-PB_CNT_CUM_NOT_NULL sy-vline 
WA_CVS_WU_STR-PB_RBX_CUM_NOT_NULL sy-vline 
WA_CVS_WU_STR-PB_CNT_CUR_NOT_NULL sy-vline 
WA_CVS_WU_STR-PB_RBX_CUR_NOT_NULL sy-vline 
WA_CVS_WU_STR-COVRESET1_NOT_NULL sy-vline 
WA_CVS_WU_STR-UNICODE sy-vline 
WA_CVS_WU_STR-TESTED sy-vline 
WA_CVS_WU_STR-LED sy-vline 
WA_CVS_WU_STR-ICON sy-vline 
WA_CVS_WU_STR-SRC_KEY sy-vline 
WA_CVS_WU_STR-COVRESET1 sy-vline 
WA_CVS_WU_STR-COVRESET2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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