ABAP Select data from SAP table TXW_TVST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TXW_TVST
*  INTO TABLE @DATA(IT_TXW_TVST2).
*--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_TXW_TVST INDEX 1 INTO DATA(WA_TXW_TVST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TXW_TVST>-MANDT = 1.
<TXW_TVST>-VSTEL = 1.
<TXW_TVST>-FABKL = 1.
<TXW_TVST>-VTRZT = 1.
<TXW_TVST>-ADRNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TXW_TVST-ALAND, sy-vline,
  WA_TXW_TVST-AZONE, sy-vline,
  WA_TXW_TVST-TXNAM_ADR, sy-vline,
  WA_TXW_TVST-TXNAM_KOP, sy-vline,
  WA_TXW_TVST-TXNAM_FUS, sy-vline,
  WA_TXW_TVST-TXNAM_GRU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TXW_TVST 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_TXW_TVST 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_TXW_TVST INTO WA_TXW_TVST.


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

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_TVST-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_TVST-SPRAS.
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_TXW_TVST_STR, 
MANDT TYPE STRING,
VSTEL TYPE STRING,
FABKL TYPE STRING,
VTRZT TYPE STRING,
ADRNR TYPE STRING,
ALAND TYPE STRING,
AZONE TYPE STRING,
TXNAM_ADR TYPE STRING,
TXNAM_KOP TYPE STRING,
TXNAM_FUS TYPE STRING,
TXNAM_GRU TYPE STRING,
KSCHL TYPE STRING,
SPRAS TYPE STRING,
ANZAL TYPE STRING,
VSZTP TYPE STRING,
NACHA TYPE STRING,
LAZBS TYPE STRING,
RIZBS TYPE STRING,
LAZZT TYPE STRING,
RIZZT TYPE STRING,
KOQUI TYPE STRING,
KOMSU TYPE STRING,
IMESS TYPE STRING,
TXNAM_SDB TYPE STRING,
ALW_SW TYPE STRING,
LOADTG TYPE STRING,
LOADTN TYPE STRING,
PIPATG TYPE STRING,
PIPATN TYPE STRING,
TSTRID TYPE STRING,
ROUNDG TYPE STRING,
ROUNDN TYPE STRING,
VTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TXW_TVST_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_TXW_TVST_STR-MANDT sy-vline 
WA_TXW_TVST_STR-VSTEL sy-vline 
WA_TXW_TVST_STR-FABKL sy-vline 
WA_TXW_TVST_STR-VTRZT sy-vline 
WA_TXW_TVST_STR-ADRNR sy-vline 
WA_TXW_TVST_STR-ALAND sy-vline 
WA_TXW_TVST_STR-AZONE sy-vline 
WA_TXW_TVST_STR-TXNAM_ADR sy-vline 
WA_TXW_TVST_STR-TXNAM_KOP sy-vline 
WA_TXW_TVST_STR-TXNAM_FUS sy-vline 
WA_TXW_TVST_STR-TXNAM_GRU sy-vline 
WA_TXW_TVST_STR-KSCHL sy-vline 
WA_TXW_TVST_STR-SPRAS sy-vline 
WA_TXW_TVST_STR-ANZAL sy-vline 
WA_TXW_TVST_STR-VSZTP sy-vline 
WA_TXW_TVST_STR-NACHA sy-vline 
WA_TXW_TVST_STR-LAZBS sy-vline 
WA_TXW_TVST_STR-RIZBS sy-vline 
WA_TXW_TVST_STR-LAZZT sy-vline 
WA_TXW_TVST_STR-RIZZT sy-vline 
WA_TXW_TVST_STR-KOQUI sy-vline 
WA_TXW_TVST_STR-KOMSU sy-vline 
WA_TXW_TVST_STR-IMESS sy-vline 
WA_TXW_TVST_STR-TXNAM_SDB sy-vline 
WA_TXW_TVST_STR-ALW_SW sy-vline 
WA_TXW_TVST_STR-LOADTG sy-vline 
WA_TXW_TVST_STR-LOADTN sy-vline 
WA_TXW_TVST_STR-PIPATG sy-vline 
WA_TXW_TVST_STR-PIPATN sy-vline 
WA_TXW_TVST_STR-TSTRID sy-vline 
WA_TXW_TVST_STR-ROUNDG sy-vline 
WA_TXW_TVST_STR-ROUNDN sy-vline 
WA_TXW_TVST_STR-VTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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