ABAP Select data from SAP table V_TNHCO into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_TNHCO 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_TNHCO. 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_TNHCO 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_TNHCO TYPE STANDARD TABLE OF V_TNHCO,
      WA_V_TNHCO TYPE V_TNHCO,
      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_TNHCO> TYPE V_TNHCO.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_TNHCO
*  INTO TABLE @DATA(IT_V_TNHCO2).
*--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_TNHCO INDEX 1 INTO DATA(WA_V_TNHCO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_TNHCO>-MANDT = 1.
<V_TNHCO>-EINRI = 1.
<V_TNHCO>-LVKOS = 1.
<V_TNHCO>-LVAUF = 1.
<V_TNHCO>-LVAKS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_TNHCO-LVKAS, sy-vline,
  WA_V_TNHCO-SAAUF, sy-vline,
  WA_V_TNHCO-FAAUF, sy-vline,
  WA_V_TNHCO-KTAUF, sy-vline,
  WA_V_TNHCO-SAART, sy-vline,
  WA_V_TNHCO-FAART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_TNHCO 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_TNHCO 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_TNHCO INTO WA_V_TNHCO.


*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 EINRI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_TNHCO-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_TNHCO-EINRI.
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_TNHCO_STR, 
MANDT TYPE STRING,
EINRI TYPE STRING,
LVKOS TYPE STRING,
LVAUF TYPE STRING,
LVAKS TYPE STRING,
LVKAS TYPE STRING,
SAAUF TYPE STRING,
FAAUF TYPE STRING,
KTAUF TYPE STRING,
SAART TYPE STRING,
FAART TYPE STRING,
KTART TYPE STRING,
VARKO TYPE STRING,
VARFA TYPE STRING,
VARKT TYPE STRING,
NOILV TYPE STRING,
KLVAR TYPE STRING,
AUFIM TYPE STRING,
VARST TYPE STRING,
SDUMK TYPE STRING,
RDUMK TYPE STRING,
NOILVA TYPE STRING,
LVKOSA TYPE STRING,
SGFORM TYPE STRING,
SGPROG TYPE STRING,
MULTF TYPE STRING,
EINKB TYPE STRING,
PRODKZ TYPE STRING,
UEBZP TYPE STRING,
NOBUF TYPE STRING,
VARSF TYPE STRING,
FAAUFA TYPE STRING,
FAARTA TYPE STRING,
LVAUFA TYPE STRING,
LVAKSA TYPE STRING,
AUFTA TYPE STRING,
STLRV TYPE STRING,
DBCACT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_TNHCO_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_TNHCO_STR-MANDT sy-vline 
WA_V_TNHCO_STR-EINRI sy-vline 
WA_V_TNHCO_STR-LVKOS sy-vline 
WA_V_TNHCO_STR-LVAUF sy-vline 
WA_V_TNHCO_STR-LVAKS sy-vline 
WA_V_TNHCO_STR-LVKAS sy-vline 
WA_V_TNHCO_STR-SAAUF sy-vline 
WA_V_TNHCO_STR-FAAUF sy-vline 
WA_V_TNHCO_STR-KTAUF sy-vline 
WA_V_TNHCO_STR-SAART sy-vline 
WA_V_TNHCO_STR-FAART sy-vline 
WA_V_TNHCO_STR-KTART sy-vline 
WA_V_TNHCO_STR-VARKO sy-vline 
WA_V_TNHCO_STR-VARFA sy-vline 
WA_V_TNHCO_STR-VARKT sy-vline 
WA_V_TNHCO_STR-NOILV sy-vline 
WA_V_TNHCO_STR-KLVAR sy-vline 
WA_V_TNHCO_STR-AUFIM sy-vline 
WA_V_TNHCO_STR-VARST sy-vline 
WA_V_TNHCO_STR-SDUMK sy-vline 
WA_V_TNHCO_STR-RDUMK sy-vline 
WA_V_TNHCO_STR-NOILVA sy-vline 
WA_V_TNHCO_STR-LVKOSA sy-vline 
WA_V_TNHCO_STR-SGFORM sy-vline 
WA_V_TNHCO_STR-SGPROG sy-vline 
WA_V_TNHCO_STR-MULTF sy-vline 
WA_V_TNHCO_STR-EINKB sy-vline 
WA_V_TNHCO_STR-PRODKZ sy-vline 
WA_V_TNHCO_STR-UEBZP sy-vline 
WA_V_TNHCO_STR-NOBUF sy-vline 
WA_V_TNHCO_STR-VARSF sy-vline 
WA_V_TNHCO_STR-FAAUFA sy-vline 
WA_V_TNHCO_STR-FAARTA sy-vline 
WA_V_TNHCO_STR-LVAUFA sy-vline 
WA_V_TNHCO_STR-LVAKSA sy-vline 
WA_V_TNHCO_STR-AUFTA sy-vline 
WA_V_TNHCO_STR-STLRV sy-vline 
WA_V_TNHCO_STR-DBCACT sy-vline      INTO ld_text SEPARATED BY SPACE.

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