ABAP Select data from SAP table P_TVKO into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P_TVKO 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 P_TVKO. 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 P_TVKO 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_P_TVKO TYPE STANDARD TABLE OF P_TVKO,
      WA_P_TVKO TYPE P_TVKO,
      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: <P_TVKO> TYPE P_TVKO.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P_TVKO
*  INTO TABLE @DATA(IT_P_TVKO2).
*--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_P_TVKO INDEX 1 INTO DATA(WA_P_TVKO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P_TVKO>-MANDT = 1.
<P_TVKO>-VKORG = 1.
<P_TVKO>-WAERS = 1.
<P_TVKO>-BUKRS = 1.
<P_TVKO>-ADRNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P_TVKO-TXNAM_ADR, sy-vline,
  WA_P_TVKO-TXNAM_KOP, sy-vline,
  WA_P_TVKO-TXNAM_FUS, sy-vline,
  WA_P_TVKO-TXNAM_GRU, sy-vline,
  WA_P_TVKO-VKOAU, sy-vline,
  WA_P_TVKO-KUNNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P_TVKO 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_P_TVKO 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_P_TVKO INTO WA_P_TVKO.


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

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

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P_TVKO-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P_TVKO-LIFNR.
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_P_TVKO_STR, 
MANDT TYPE STRING,
VKORG TYPE STRING,
WAERS TYPE STRING,
BUKRS TYPE STRING,
ADRNR TYPE STRING,
TXNAM_ADR TYPE STRING,
TXNAM_KOP TYPE STRING,
TXNAM_FUS TYPE STRING,
TXNAM_GRU TYPE STRING,
VKOAU TYPE STRING,
KUNNR TYPE STRING,
BOAVO TYPE STRING,
VKOKL TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
LIFNR TYPE STRING,
WERKS TYPE STRING,
BSART TYPE STRING,
BSTYP TYPE STRING,
BWART TYPE STRING,
LGORT TYPE STRING,
TXNAM_SDB TYPE STRING,
MWSKZ TYPE STRING,
XSTCEG TYPE STRING,
J_1ANUTIME TYPE STRING,
MAXBI TYPE STRING,
HIDE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P_TVKO_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_P_TVKO_STR-MANDT sy-vline 
WA_P_TVKO_STR-VKORG sy-vline 
WA_P_TVKO_STR-WAERS sy-vline 
WA_P_TVKO_STR-BUKRS sy-vline 
WA_P_TVKO_STR-ADRNR sy-vline 
WA_P_TVKO_STR-TXNAM_ADR sy-vline 
WA_P_TVKO_STR-TXNAM_KOP sy-vline 
WA_P_TVKO_STR-TXNAM_FUS sy-vline 
WA_P_TVKO_STR-TXNAM_GRU sy-vline 
WA_P_TVKO_STR-VKOAU sy-vline 
WA_P_TVKO_STR-KUNNR sy-vline 
WA_P_TVKO_STR-BOAVO sy-vline 
WA_P_TVKO_STR-VKOKL sy-vline 
WA_P_TVKO_STR-EKORG sy-vline 
WA_P_TVKO_STR-EKGRP sy-vline 
WA_P_TVKO_STR-LIFNR sy-vline 
WA_P_TVKO_STR-WERKS sy-vline 
WA_P_TVKO_STR-BSART sy-vline 
WA_P_TVKO_STR-BSTYP sy-vline 
WA_P_TVKO_STR-BWART sy-vline 
WA_P_TVKO_STR-LGORT sy-vline 
WA_P_TVKO_STR-TXNAM_SDB sy-vline 
WA_P_TVKO_STR-MWSKZ sy-vline 
WA_P_TVKO_STR-XSTCEG sy-vline 
WA_P_TVKO_STR-J_1ANUTIME sy-vline 
WA_P_TVKO_STR-MAXBI sy-vline 
WA_P_TVKO_STR-HIDE sy-vline      INTO ld_text SEPARATED BY SPACE.

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