ABAP Select data from SAP table TXI_TVKN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TXI_TVKN
*  INTO TABLE @DATA(IT_TXI_TVKN2).
*--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_TXI_TVKN INDEX 1 INTO DATA(WA_TXI_TVKN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TXI_TVKN>-MANDT = 1.
<TXI_TVKN>-KNOTE = 1.
<TXI_TVKN>-ADRNR = 1.
<TXI_TVKN>-GRENZ = 1.
<TXI_TVKN>-UMSCH = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TXI_TVKN-FLUGH, sy-vline,
  WA_TXI_TVKN-SEEHF, sy-vline,
  WA_TXI_TVKN-BINHF, sy-vline,
  WA_TXI_TVKN-BAHNH, sy-vline,
  WA_TXI_TVKN-BAHNR, sy-vline,
  WA_TXI_TVKN-STBNH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TXI_TVKN 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_TXI_TVKN 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_TXI_TVKN INTO WA_TXI_TVKN.


*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_TXI_TVKN-ADRNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXI_TVKN-ADRNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit TSTRG, internal->external for field AUFZTD
CALL FUNCTION 'CONVERSION_EXIT_TSTRG_OUTPUT'
  EXPORTING
    input =                      WA_TXI_TVKN-AUFZTD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXI_TVKN-AUFZTD.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXI_TVKN-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXI_TVKN-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_TXI_TVKN_STR, 
MANDT TYPE STRING,
KNOTE TYPE STRING,
ADRNR TYPE STRING,
GRENZ TYPE STRING,
UMSCH TYPE STRING,
FLUGH TYPE STRING,
SEEHF TYPE STRING,
BINHF TYPE STRING,
BAHNH TYPE STRING,
BAHNR TYPE STRING,
STBNH TYPE STRING,
EXBNH TYPE STRING,
PABNH TYPE STRING,
LABNH TYPE STRING,
BAHNG TYPE STRING,
STREKL TYPE STRING,
ZOLLS TYPE STRING,
SPFBK TYPE STRING,
AUFZTD TYPE STRING,
KUNNR TYPE STRING,
KUNABL TYPE STRING,
LIFNR TYPE STRING,
VSTEL TYPE STRING,
LSTEL TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
LGNUM TYPE STRING,
TOR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TXI_TVKN_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_TXI_TVKN_STR-MANDT sy-vline 
WA_TXI_TVKN_STR-KNOTE sy-vline 
WA_TXI_TVKN_STR-ADRNR sy-vline 
WA_TXI_TVKN_STR-GRENZ sy-vline 
WA_TXI_TVKN_STR-UMSCH sy-vline 
WA_TXI_TVKN_STR-FLUGH sy-vline 
WA_TXI_TVKN_STR-SEEHF sy-vline 
WA_TXI_TVKN_STR-BINHF sy-vline 
WA_TXI_TVKN_STR-BAHNH sy-vline 
WA_TXI_TVKN_STR-BAHNR sy-vline 
WA_TXI_TVKN_STR-STBNH sy-vline 
WA_TXI_TVKN_STR-EXBNH sy-vline 
WA_TXI_TVKN_STR-PABNH sy-vline 
WA_TXI_TVKN_STR-LABNH sy-vline 
WA_TXI_TVKN_STR-BAHNG sy-vline 
WA_TXI_TVKN_STR-STREKL sy-vline 
WA_TXI_TVKN_STR-ZOLLS sy-vline 
WA_TXI_TVKN_STR-SPFBK sy-vline 
WA_TXI_TVKN_STR-AUFZTD sy-vline 
WA_TXI_TVKN_STR-KUNNR sy-vline 
WA_TXI_TVKN_STR-KUNABL sy-vline 
WA_TXI_TVKN_STR-LIFNR sy-vline 
WA_TXI_TVKN_STR-VSTEL sy-vline 
WA_TXI_TVKN_STR-LSTEL sy-vline 
WA_TXI_TVKN_STR-WERKS sy-vline 
WA_TXI_TVKN_STR-LGORT sy-vline 
WA_TXI_TVKN_STR-LGNUM sy-vline 
WA_TXI_TVKN_STR-TOR sy-vline      INTO ld_text SEPARATED BY SPACE.

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