ABAP Select data from SAP table V_TWPIR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_TWPIR 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_TWPIR. 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_TWPIR 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_TWPIR TYPE STANDARD TABLE OF V_TWPIR,
      WA_V_TWPIR TYPE V_TWPIR,
      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_TWPIR> TYPE V_TWPIR.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_TWPIR
*  INTO TABLE @DATA(IT_V_TWPIR2).
*--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_TWPIR INDEX 1 INTO DATA(WA_V_TWPIR2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_TWPIR-FSTAT, sy-vline,
  WA_V_TWPIR-ANDEB, sy-vline,
  WA_V_TWPIR-LGORT, sy-vline,
  WA_V_TWPIR-BWAVK, sy-vline,
  WA_V_TWPIR-BWART, sy-vline,
  WA_V_TWPIR-AUART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_TWPIR 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_TWPIR 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_TWPIR INTO WA_V_TWPIR.


*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_TWPIR-ANDEB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_TWPIR-ANDEB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AUART, internal->external for field AUART
CALL FUNCTION 'CONVERSION_EXIT_AUART_OUTPUT'
  EXPORTING
    input =                      WA_V_TWPIR-AUART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_TWPIR-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_TWPIR_STR, 
MANDT TYPE STRING,
INPRO TYPE STRING,
FINVM TYPE STRING,
FBILL TYPE STRING,
FREPL TYPE STRING,
FSTAT 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,
NUMTR TYPE STRING,
FXSTR TYPE STRING,
FSTATBW TYPE STRING,
FSTATRISBW TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_TWPIR_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_TWPIR_STR-MANDT sy-vline 
WA_V_TWPIR_STR-INPRO sy-vline 
WA_V_TWPIR_STR-FINVM sy-vline 
WA_V_TWPIR_STR-FBILL sy-vline 
WA_V_TWPIR_STR-FREPL sy-vline 
WA_V_TWPIR_STR-FSTAT sy-vline 
WA_V_TWPIR_STR-ANDEB sy-vline 
WA_V_TWPIR_STR-LGORT sy-vline 
WA_V_TWPIR_STR-BWAVK sy-vline 
WA_V_TWPIR_STR-BWART sy-vline 
WA_V_TWPIR_STR-AUART sy-vline 
WA_V_TWPIR_STR-PSTYV sy-vline 
WA_V_TWPIR_STR-FKARA sy-vline 
WA_V_TWPIR_STR-KALSM sy-vline 
WA_V_TWPIR_STR-KSCHL sy-vline 
WA_V_TWPIR_STR-KKSCH sy-vline 
WA_V_TWPIR_STR-KPSTY sy-vline 
WA_V_TWPIR_STR-NUMTR sy-vline 
WA_V_TWPIR_STR-FXSTR sy-vline 
WA_V_TWPIR_STR-FSTATBW sy-vline 
WA_V_TWPIR_STR-FSTATRISBW sy-vline      INTO ld_text SEPARATED BY SPACE.

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