ABAP Select data from SAP table V_TWPIV_SRV into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_TWPIV_SRV 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_TWPIV_SRV. 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_TWPIV_SRV 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_TWPIV_SRV TYPE STANDARD TABLE OF V_TWPIV_SRV,
      WA_V_TWPIV_SRV TYPE V_TWPIV_SRV,
      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_TWPIV_SRV> TYPE V_TWPIV_SRV.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_TWPIV_SRV
*  INTO TABLE @DATA(IT_V_TWPIV_SRV2).
*--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_TWPIV_SRV INDEX 1 INTO DATA(WA_V_TWPIV_SRV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_TWPIV_SRV>-MANDT = 1.
<V_TWPIV_SRV>-INPRO = 1.
<V_TWPIV_SRV>-FINVM = 1.
<V_TWPIV_SRV>-FBILL = 1.
<V_TWPIV_SRV>-ANDEB = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_TWPIV_SRV-LGORT, sy-vline,
  WA_V_TWPIV_SRV-BWAVK, sy-vline,
  WA_V_TWPIV_SRV-BWART, sy-vline,
  WA_V_TWPIV_SRV-AUART, sy-vline,
  WA_V_TWPIV_SRV-PSTYV, sy-vline,
  WA_V_TWPIV_SRV-FKARA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_TWPIV_SRV 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_TWPIV_SRV 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_TWPIV_SRV INTO WA_V_TWPIV_SRV.


*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 ANDEB
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_TWPIV_SRV-ANDEB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_TWPIV_SRV-ANDEB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AUART, internal->external for field AUART
CALL FUNCTION 'CONVERSION_EXIT_AUART_OUTPUT'
  EXPORTING
    input =                      WA_V_TWPIV_SRV-AUART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_TWPIV_SRV-AUART.
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_TWPIV_SRV_STR, 
MANDT TYPE STRING,
INPRO TYPE STRING,
FINVM TYPE STRING,
FBILL TYPE STRING,
ANDEB TYPE STRING,
LGORT TYPE STRING,
BWAVK TYPE STRING,
BWART TYPE STRING,
AUART TYPE STRING,
PSTYV TYPE STRING,
FKARA TYPE STRING,
KALSM TYPE STRING,
KSCHL TYPE STRING,
KKSCH TYPE STRING,
KPSTY TYPE STRING,
NUMLI TYPE STRING,
FXSTR TYPE STRING,
SRESP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_TWPIV_SRV_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_TWPIV_SRV_STR-MANDT sy-vline 
WA_V_TWPIV_SRV_STR-INPRO sy-vline 
WA_V_TWPIV_SRV_STR-FINVM sy-vline 
WA_V_TWPIV_SRV_STR-FBILL sy-vline 
WA_V_TWPIV_SRV_STR-ANDEB sy-vline 
WA_V_TWPIV_SRV_STR-LGORT sy-vline 
WA_V_TWPIV_SRV_STR-BWAVK sy-vline 
WA_V_TWPIV_SRV_STR-BWART sy-vline 
WA_V_TWPIV_SRV_STR-AUART sy-vline 
WA_V_TWPIV_SRV_STR-PSTYV sy-vline 
WA_V_TWPIV_SRV_STR-FKARA sy-vline 
WA_V_TWPIV_SRV_STR-KALSM sy-vline 
WA_V_TWPIV_SRV_STR-KSCHL sy-vline 
WA_V_TWPIV_SRV_STR-KKSCH sy-vline 
WA_V_TWPIV_SRV_STR-KPSTY sy-vline 
WA_V_TWPIV_SRV_STR-NUMLI sy-vline 
WA_V_TWPIV_SRV_STR-FXSTR sy-vline 
WA_V_TWPIV_SRV_STR-SRESP sy-vline      INTO ld_text SEPARATED BY SPACE.

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