ABAP Select data from SAP table V_TN16P into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_TN16P 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_TN16P. 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_TN16P 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_TN16P TYPE STANDARD TABLE OF V_TN16P,
      WA_V_TN16P TYPE V_TN16P,
      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_TN16P> TYPE V_TN16P.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_TN16P.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_TN16P
  INTO TABLE IT_V_TN16P.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_TN16P
*  INTO TABLE @DATA(IT_V_TN16P2).
*--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_TN16P INDEX 1 INTO DATA(WA_V_TN16P2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_TN16P ASSIGNING <V_TN16P>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_TN16P>-MANDT = 1.
<V_TN16P>-EINRI = 1.
<V_TN16P>-VTRTY = 1.
<V_TN16P>-POSNO = 1.
<V_TN16P>-RANKI = 1.

ENDLOOP.

LOOP AT IT_V_TN16P INTO WA_V_TN16P.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_TN16P-PERCT, sy-vline,
  WA_V_TN16P-MAXAM, sy-vline,
  WA_V_TN16P-MAXAD, sy-vline,
  WA_V_TN16P-EXACT, sy-vline,
  WA_V_TN16P-EXID, sy-vline,
  WA_V_TN16P-INFIL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_TN16P 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_TN16P 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_TN16P INTO WA_V_TN16P.


*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_TN16P-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_TN16P-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VTRTY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_TN16P-VTRTY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_TN16P-VTRTY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RANKI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_TN16P-RANKI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_TN16P-RANKI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TARIF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_TN16P-TARIF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_TN16P-TARIF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SERIN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_TN16P-SERIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_TN16P-SERIN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SEREX
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_TN16P-SEREX
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_TN16P-SEREX.
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_TN16P_STR, 
MANDT TYPE STRING,
EINRI TYPE STRING,
VTRTY TYPE STRING,
POSNO TYPE STRING,
RANKI TYPE STRING,
PERCT TYPE STRING,
MAXAM TYPE STRING,
MAXAD TYPE STRING,
EXACT TYPE STRING,
EXID TYPE STRING,
INFIL TYPE STRING,
EXFIL TYPE STRING,
TARIF TYPE STRING,
BWART TYPE STRING,
PCOND TYPE STRING,
EINKB TYPE STRING,
KTEXT TYPE STRING,
UPDAT TYPE STRING,
UPUSR TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
WAERS TYPE STRING,
PWERT TYPE STRING,
DAYTO TYPE STRING,
MDIND TYPE STRING,
/ISHFR/INT_PERCT TYPE STRING,
FNAME TYPE STRING,
FVALUE TYPE STRING,
SERIN TYPE STRING,
SEREX TYPE STRING,
PLTEXT TYPE STRING,
CALC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_TN16P_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_TN16P_STR-MANDT sy-vline 
WA_V_TN16P_STR-EINRI sy-vline 
WA_V_TN16P_STR-VTRTY sy-vline 
WA_V_TN16P_STR-POSNO sy-vline 
WA_V_TN16P_STR-RANKI sy-vline 
WA_V_TN16P_STR-PERCT sy-vline 
WA_V_TN16P_STR-MAXAM sy-vline 
WA_V_TN16P_STR-MAXAD sy-vline 
WA_V_TN16P_STR-EXACT sy-vline 
WA_V_TN16P_STR-EXID sy-vline 
WA_V_TN16P_STR-INFIL sy-vline 
WA_V_TN16P_STR-EXFIL sy-vline 
WA_V_TN16P_STR-TARIF sy-vline 
WA_V_TN16P_STR-BWART sy-vline 
WA_V_TN16P_STR-PCOND sy-vline 
WA_V_TN16P_STR-EINKB sy-vline 
WA_V_TN16P_STR-KTEXT sy-vline 
WA_V_TN16P_STR-UPDAT sy-vline 
WA_V_TN16P_STR-UPUSR sy-vline 
WA_V_TN16P_STR-ERDAT sy-vline 
WA_V_TN16P_STR-ERNAM sy-vline 
WA_V_TN16P_STR-WAERS sy-vline 
WA_V_TN16P_STR-PWERT sy-vline 
WA_V_TN16P_STR-DAYTO sy-vline 
WA_V_TN16P_STR-MDIND sy-vline 
WA_V_TN16P_STR-/ISHFR/INT_PERCT sy-vline 
WA_V_TN16P_STR-FNAME sy-vline 
WA_V_TN16P_STR-FVALUE sy-vline 
WA_V_TN16P_STR-SERIN sy-vline 
WA_V_TN16P_STR-SEREX sy-vline 
WA_V_TN16P_STR-PLTEXT sy-vline 
WA_V_TN16P_STR-CALC sy-vline      INTO ld_text SEPARATED BY SPACE.

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