ABAP Select data from SAP table WCVY1 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 WCVY1 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 WCVY1. 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 WCVY1 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_WCVY1 TYPE STANDARD TABLE OF WCVY1,
      WA_WCVY1 TYPE WCVY1,
      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: <WCVY1> TYPE WCVY1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_WCVY1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM WCVY1
  INTO TABLE IT_WCVY1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WCVY1
*  INTO TABLE @DATA(IT_WCVY12).
*--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_WCVY1 INDEX 1 INTO DATA(WA_WCVY12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_WCVY1 ASSIGNING <WCVY1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WCVY1>-MANDT = 1.
<WCVY1>-IWERK = 1.
<WCVY1>-WAPIUSE = 1.
<WCVY1>-NAME1 = 1.
<WCVY1>-WAPIUSEX = 1.

ENDLOOP.

LOOP AT IT_WCVY1 INTO WA_WCVY1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WCVY1-DATEFROFFSET, sy-vline,
  WA_WCVY1-TIMEFR, sy-vline,
  WA_WCVY1-PERIOD, sy-vline,
  WA_WCVY1-EXTPERIOD, sy-vline,
  WA_WCVY1-EXTMAXPERIOD, sy-vline,
  WA_WCVY1-STXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WCVY1 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_WCVY1 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_WCVY1 INTO WA_WCVY1.


*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_WCVY1_STR, 
MANDT TYPE STRING,
IWERK TYPE STRING,
WAPIUSE TYPE STRING,
NAME1 TYPE STRING,
WAPIUSEX TYPE STRING,
DATEFROFFSET TYPE STRING,
TIMEFR TYPE STRING,
PERIOD TYPE STRING,
EXTPERIOD TYPE STRING,
EXTMAXPERIOD TYPE STRING,
STXT TYPE STRING,
PTXT TYPE STRING,
USECTRL TYPE STRING,
INT_RANGE TYPE STRING,
EXT_RANGE TYPE STRING,
VIEWPROFILE TYPE STRING,
USE4GEN TYPE STRING,
MOBIFLG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WCVY1_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_WCVY1_STR-MANDT sy-vline 
WA_WCVY1_STR-IWERK sy-vline 
WA_WCVY1_STR-WAPIUSE sy-vline 
WA_WCVY1_STR-NAME1 sy-vline 
WA_WCVY1_STR-WAPIUSEX sy-vline 
WA_WCVY1_STR-DATEFROFFSET sy-vline 
WA_WCVY1_STR-TIMEFR sy-vline 
WA_WCVY1_STR-PERIOD sy-vline 
WA_WCVY1_STR-EXTPERIOD sy-vline 
WA_WCVY1_STR-EXTMAXPERIOD sy-vline 
WA_WCVY1_STR-STXT sy-vline 
WA_WCVY1_STR-PTXT sy-vline 
WA_WCVY1_STR-USECTRL sy-vline 
WA_WCVY1_STR-INT_RANGE sy-vline 
WA_WCVY1_STR-EXT_RANGE sy-vline 
WA_WCVY1_STR-VIEWPROFILE sy-vline 
WA_WCVY1_STR-USE4GEN sy-vline 
WA_WCVY1_STR-MOBIFLG sy-vline      INTO ld_text SEPARATED BY SPACE.

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