ABAP Select data from SAP table V_CPNTYPE 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 V_CPNTYPE 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_CPNTYPE. 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_CPNTYPE 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_CPNTYPE TYPE STANDARD TABLE OF V_CPNTYPE,
      WA_V_CPNTYPE TYPE V_CPNTYPE,
      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_CPNTYPE> TYPE V_CPNTYPE.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_CPNTYPE
*  INTO TABLE @DATA(IT_V_CPNTYPE2).
*--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_CPNTYPE INDEX 1 INTO DATA(WA_V_CPNTYPE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_CPNTYPE>-MANDT = 1.
<V_CPNTYPE>-PNTYPE = 1.
<V_CPNTYPE>-APPLOBJ_TYPE = 1.
<V_CPNTYPE>-PVSLAYER = 1.
<V_CPNTYPE>-CLASS_MIN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_CPNTYPE-CLASS_MAX, sy-vline,
  WA_V_CPNTYPE-CONF_FLG, sy-vline,
  WA_V_CPNTYPE-KONS_FLG, sy-vline,
  WA_V_CPNTYPE-VAR_SCHEMA, sy-vline,
  WA_V_CPNTYPE-ACTTYPE, sy-vline,
  WA_V_CPNTYPE-FLOTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_CPNTYPE 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_CPNTYPE 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_CPNTYPE INTO WA_V_CPNTYPE.


*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_CPNTYPE-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_CPNTYPE-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_CPNTYPE_STR, 
MANDT TYPE STRING,
PNTYPE TYPE STRING,
APPLOBJ_TYPE TYPE STRING,
PVSLAYER TYPE STRING,
CLASS_MIN TYPE STRING,
CLASS_MAX TYPE STRING,
CONF_FLG TYPE STRING,
KONS_FLG TYPE STRING,
VAR_SCHEMA TYPE STRING,
ACTTYPE TYPE STRING,
FLOTYPE TYPE STRING,
CLINT TYPE STRING,
REF_PNTYPE TYPE STRING,
HIST_MODE 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,
PNAME_LEN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_CPNTYPE_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_CPNTYPE_STR-MANDT sy-vline 
WA_V_CPNTYPE_STR-PNTYPE sy-vline 
WA_V_CPNTYPE_STR-APPLOBJ_TYPE sy-vline 
WA_V_CPNTYPE_STR-PVSLAYER sy-vline 
WA_V_CPNTYPE_STR-CLASS_MIN sy-vline 
WA_V_CPNTYPE_STR-CLASS_MAX sy-vline 
WA_V_CPNTYPE_STR-CONF_FLG sy-vline 
WA_V_CPNTYPE_STR-KONS_FLG sy-vline 
WA_V_CPNTYPE_STR-VAR_SCHEMA sy-vline 
WA_V_CPNTYPE_STR-ACTTYPE sy-vline 
WA_V_CPNTYPE_STR-FLOTYPE sy-vline 
WA_V_CPNTYPE_STR-CLINT sy-vline 
WA_V_CPNTYPE_STR-REF_PNTYPE sy-vline 
WA_V_CPNTYPE_STR-HIST_MODE sy-vline 
WA_V_CPNTYPE_STR-HIDE_FLG sy-vline 
WA_V_CPNTYPE_STR-ICON sy-vline 
WA_V_CPNTYPE_STR-PDESC sy-vline 
WA_V_CPNTYPE_STR-CONTEXTENV sy-vline 
WA_V_CPNTYPE_STR-CLASS sy-vline 
WA_V_CPNTYPE_STR-KLART sy-vline 
WA_V_CPNTYPE_STR-CREADAT sy-vline 
WA_V_CPNTYPE_STR-CREABY sy-vline 
WA_V_CPNTYPE_STR-CHNGDAT sy-vline 
WA_V_CPNTYPE_STR-CHNGBY sy-vline 
WA_V_CPNTYPE_STR-LOGSYS sy-vline 
WA_V_CPNTYPE_STR-ICON_SHOW sy-vline 
WA_V_CPNTYPE_STR-PNAME_LEN sy-vline      INTO ld_text SEPARATED BY SPACE.

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