ABAP Select data from SAP table TXW_VDF into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TXW_VDF 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_VDF. 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_VDF 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_VDF TYPE STANDARD TABLE OF TXW_VDF,
      WA_TXW_VDF TYPE TXW_VDF,
      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_VDF> TYPE TXW_VDF.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TXW_VDF
*  INTO TABLE @DATA(IT_TXW_VDF2).
*--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_VDF INDEX 1 INTO DATA(WA_TXW_VDF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TXW_VDF>-TAX_VIEW = 1.
<TXW_VDF>-TEXT = 1.
<TXW_VDF>-TEXT1 = 1.
<TXW_VDF>-TEXT2 = 1.
<TXW_VDF>-TEXT3 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TXW_VDF-TEXT4, sy-vline,
  WA_TXW_VDF-TEXT5, sy-vline,
  WA_TXW_VDF-TEXT6, sy-vline,
  WA_TXW_VDF-TEXT7, sy-vline,
  WA_TXW_VDF-TEXT8, sy-vline,
  WA_TXW_VDF-TEXT9, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TXW_VDF 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_VDF 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_VDF INTO WA_TXW_VDF.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_TXW_VDF_STR, 
TAX_VIEW TYPE STRING,
TEXT TYPE STRING,
TEXT1 TYPE STRING,
TEXT2 TYPE STRING,
TEXT3 TYPE STRING,
TEXT4 TYPE STRING,
TEXT5 TYPE STRING,
TEXT6 TYPE STRING,
TEXT7 TYPE STRING,
TEXT8 TYPE STRING,
TEXT9 TYPE STRING,
TEXT10 TYPE STRING,
TEXT11 TYPE STRING,
TEXT12 TYPE STRING,
TEXT13 TYPE STRING,
SEQNR TYPE STRING,
SEGMENT TYPE STRING,
X_VDEF TYPE STRING,
X_FLDS TYPE STRING,
X_ATTR TYPE STRING,
EQ_OPER TYPE STRING,
X_TRANS TYPE STRING,
X_MASTR TYPE STRING,
SRC_TAB1 TYPE STRING,
SRC_TAB2 TYPE STRING,
SRC_TAB3 TYPE STRING,
SRC_TAB4 TYPE STRING,
CAPACITY TYPE STRING,
X_I_JOIN TYPE STRING,
X_O_JOIN TYPE STRING,
X_IDXTAB TYPE STRING,
X_NO_DUPS TYPE STRING,
X_EXIT1 TYPE STRING,
MAX_HITS TYPE STRING,
X_FORMAT1 TYPE STRING,
X_FORMAT2 TYPE STRING,
X_FORMAT3 TYPE STRING,
X_FORMAT4 TYPE STRING,
X_OVERWR TYPE STRING,
X_APPEND TYPE STRING,
X_HEADER TYPE STRING,
WRITESEG TYPE STRING,
X_TOTONLY TYPE STRING,
DISKSPACE TYPE STRING,
X_DIVIDE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TXW_VDF_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_VDF_STR-TAX_VIEW sy-vline 
WA_TXW_VDF_STR-TEXT sy-vline 
WA_TXW_VDF_STR-TEXT1 sy-vline 
WA_TXW_VDF_STR-TEXT2 sy-vline 
WA_TXW_VDF_STR-TEXT3 sy-vline 
WA_TXW_VDF_STR-TEXT4 sy-vline 
WA_TXW_VDF_STR-TEXT5 sy-vline 
WA_TXW_VDF_STR-TEXT6 sy-vline 
WA_TXW_VDF_STR-TEXT7 sy-vline 
WA_TXW_VDF_STR-TEXT8 sy-vline 
WA_TXW_VDF_STR-TEXT9 sy-vline 
WA_TXW_VDF_STR-TEXT10 sy-vline 
WA_TXW_VDF_STR-TEXT11 sy-vline 
WA_TXW_VDF_STR-TEXT12 sy-vline 
WA_TXW_VDF_STR-TEXT13 sy-vline 
WA_TXW_VDF_STR-SEQNR sy-vline 
WA_TXW_VDF_STR-SEGMENT sy-vline 
WA_TXW_VDF_STR-X_VDEF sy-vline 
WA_TXW_VDF_STR-X_FLDS sy-vline 
WA_TXW_VDF_STR-X_ATTR sy-vline 
WA_TXW_VDF_STR-EQ_OPER sy-vline 
WA_TXW_VDF_STR-X_TRANS sy-vline 
WA_TXW_VDF_STR-X_MASTR sy-vline 
WA_TXW_VDF_STR-SRC_TAB1 sy-vline 
WA_TXW_VDF_STR-SRC_TAB2 sy-vline 
WA_TXW_VDF_STR-SRC_TAB3 sy-vline 
WA_TXW_VDF_STR-SRC_TAB4 sy-vline 
WA_TXW_VDF_STR-CAPACITY sy-vline 
WA_TXW_VDF_STR-X_I_JOIN sy-vline 
WA_TXW_VDF_STR-X_O_JOIN sy-vline 
WA_TXW_VDF_STR-X_IDXTAB sy-vline 
WA_TXW_VDF_STR-X_NO_DUPS sy-vline 
WA_TXW_VDF_STR-X_EXIT1 sy-vline 
WA_TXW_VDF_STR-MAX_HITS sy-vline 
WA_TXW_VDF_STR-X_FORMAT1 sy-vline 
WA_TXW_VDF_STR-X_FORMAT2 sy-vline 
WA_TXW_VDF_STR-X_FORMAT3 sy-vline 
WA_TXW_VDF_STR-X_FORMAT4 sy-vline 
WA_TXW_VDF_STR-X_OVERWR sy-vline 
WA_TXW_VDF_STR-X_APPEND sy-vline 
WA_TXW_VDF_STR-X_HEADER sy-vline 
WA_TXW_VDF_STR-WRITESEG sy-vline 
WA_TXW_VDF_STR-X_TOTONLY sy-vline 
WA_TXW_VDF_STR-DISKSPACE sy-vline 
WA_TXW_VDF_STR-X_DIVIDE sy-vline      INTO ld_text SEPARATED BY SPACE.

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