ABAP Select data from SAP table V_TWICOSTORE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_TWICOSTORE 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_TWICOSTORE. 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_TWICOSTORE 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_TWICOSTORE TYPE STANDARD TABLE OF V_TWICOSTORE,
      WA_V_TWICOSTORE TYPE V_TWICOSTORE,
      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_TWICOSTORE> TYPE V_TWICOSTORE.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_TWICOSTORE
*  INTO TABLE @DATA(IT_V_TWICOSTORE2).
*--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_TWICOSTORE INDEX 1 INTO DATA(WA_V_TWICOSTORE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_TWICOSTORE>-MANDT = 1.
<V_TWICOSTORE>-OSTOR = 1.
<V_TWICOSTORE>-BEZEI = 1.
<V_TWICOSTORE>-BEGRU = 1.
<V_TWICOSTORE>-PCTLG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_TWICOSTORE-PCVAR, sy-vline,
  WA_V_TWICOSTORE-PCDES, sy-vline,
  WA_V_TWICOSTORE-PCOLY, sy-vline,
  WA_V_TWICOSTORE-PPSCM, sy-vline,
  WA_V_TWICOSTORE-CMSCM, sy-vline,
  WA_V_TWICOSTORE-ORSCM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_TWICOSTORE 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_TWICOSTORE 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_TWICOSTORE INTO WA_V_TWICOSTORE.


*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 KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_TWICOSTORE-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_TWICOSTORE-KUNNR.
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_TWICOSTORE_STR, 
MANDT TYPE STRING,
OSTOR TYPE STRING,
BEZEI TYPE STRING,
BEGRU TYPE STRING,
PCTLG TYPE STRING,
PCVAR TYPE STRING,
PCDES TYPE STRING,
PCOLY TYPE STRING,
PPSCM TYPE STRING,
CMSCM TYPE STRING,
ORSCM TYPE STRING,
SODES TYPE STRING,
VKBUR TYPE STRING,
KUNNR TYPE STRING,
URLIPC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_TWICOSTORE_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_TWICOSTORE_STR-MANDT sy-vline 
WA_V_TWICOSTORE_STR-OSTOR sy-vline 
WA_V_TWICOSTORE_STR-BEZEI sy-vline 
WA_V_TWICOSTORE_STR-BEGRU sy-vline 
WA_V_TWICOSTORE_STR-PCTLG sy-vline 
WA_V_TWICOSTORE_STR-PCVAR sy-vline 
WA_V_TWICOSTORE_STR-PCDES sy-vline 
WA_V_TWICOSTORE_STR-PCOLY sy-vline 
WA_V_TWICOSTORE_STR-PPSCM sy-vline 
WA_V_TWICOSTORE_STR-CMSCM sy-vline 
WA_V_TWICOSTORE_STR-ORSCM sy-vline 
WA_V_TWICOSTORE_STR-SODES sy-vline 
WA_V_TWICOSTORE_STR-VKBUR sy-vline 
WA_V_TWICOSTORE_STR-KUNNR sy-vline 
WA_V_TWICOSTORE_STR-URLIPC sy-vline      INTO ld_text SEPARATED BY SPACE.

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