ABAP Select data from SAP table V_CPVTYPE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_CPVTYPE
*  INTO TABLE @DATA(IT_V_CPVTYPE2).
*--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_V_CPVTYPE INDEX 1 INTO DATA(WA_V_CPVTYPE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_CPVTYPE>-MANDT = 1.
<V_CPVTYPE>-PVTYPE = 1.
<V_CPVTYPE>-APPLOBJ_TYPE = 1.
<V_CPVTYPE>-PVSLAYER = 1.
<V_CPVTYPE>-NODE_MIN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_CPVTYPE-NODE_MAX, sy-vline,
  WA_V_CPVTYPE-CONF_FLG, sy-vline,
  WA_V_CPVTYPE-HISTREQ_FLG, sy-vline,
  WA_V_CPVTYPE-CLINT, sy-vline,
  WA_V_CPVTYPE-REF_PVTYPE, sy-vline,
  WA_V_CPVTYPE-HIDE_FLG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_CPVTYPE 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_V_CPVTYPE 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_V_CPVTYPE INTO WA_V_CPVTYPE.


*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 LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_CPVTYPE-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_CPVTYPE-LOGSYS.
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_V_CPVTYPE_STR, 
MANDT TYPE STRING,
PVTYPE TYPE STRING,
APPLOBJ_TYPE TYPE STRING,
PVSLAYER TYPE STRING,
NODE_MIN TYPE STRING,
NODE_MAX TYPE STRING,
CONF_FLG TYPE STRING,
HISTREQ_FLG TYPE STRING,
CLINT TYPE STRING,
REF_PVTYPE TYPE STRING,
HIDE_FLG TYPE STRING,
ICON TYPE STRING,
PDESC TYPE STRING,
CONTEXTENV TYPE STRING,
CLASS TYPE STRING,
KLART TYPE STRING,
CREADAT TYPE STRING,
CREABY TYPE STRING,
CHNGDAT TYPE STRING,
CHNGBY TYPE STRING,
LOGSYS TYPE STRING,
ICON_SHOW TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_CPVTYPE_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_V_CPVTYPE_STR-MANDT sy-vline 
WA_V_CPVTYPE_STR-PVTYPE sy-vline 
WA_V_CPVTYPE_STR-APPLOBJ_TYPE sy-vline 
WA_V_CPVTYPE_STR-PVSLAYER sy-vline 
WA_V_CPVTYPE_STR-NODE_MIN sy-vline 
WA_V_CPVTYPE_STR-NODE_MAX sy-vline 
WA_V_CPVTYPE_STR-CONF_FLG sy-vline 
WA_V_CPVTYPE_STR-HISTREQ_FLG sy-vline 
WA_V_CPVTYPE_STR-CLINT sy-vline 
WA_V_CPVTYPE_STR-REF_PVTYPE sy-vline 
WA_V_CPVTYPE_STR-HIDE_FLG sy-vline 
WA_V_CPVTYPE_STR-ICON sy-vline 
WA_V_CPVTYPE_STR-PDESC sy-vline 
WA_V_CPVTYPE_STR-CONTEXTENV sy-vline 
WA_V_CPVTYPE_STR-CLASS sy-vline 
WA_V_CPVTYPE_STR-KLART sy-vline 
WA_V_CPVTYPE_STR-CREADAT sy-vline 
WA_V_CPVTYPE_STR-CREABY sy-vline 
WA_V_CPVTYPE_STR-CHNGDAT sy-vline 
WA_V_CPVTYPE_STR-CHNGBY sy-vline 
WA_V_CPVTYPE_STR-LOGSYS sy-vline 
WA_V_CPVTYPE_STR-ICON_SHOW sy-vline      INTO ld_text SEPARATED BY SPACE.

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