ABAP Select data from SAP table TXW_VW_INFO into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TXW_VW_INFO 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_VW_INFO. 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_VW_INFO 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_VW_INFO TYPE STANDARD TABLE OF TXW_VW_INFO,
      WA_TXW_VW_INFO TYPE TXW_VW_INFO,
      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_VW_INFO> TYPE TXW_VW_INFO.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TXW_VW_INFO
*  INTO TABLE @DATA(IT_TXW_VW_INFO2).
*--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_VW_INFO INDEX 1 INTO DATA(WA_TXW_VW_INFO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TXW_VW_INFO>-METADATA = 1.
<TXW_VW_INFO>-PARAMS = 1.
<TXW_VW_INFO>-EXPRT_FLG = 1.
<TXW_VW_INFO>-FILENAME = 1.
<TXW_VW_INFO>-VOL_DIR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TXW_VW_INFO-TEXT, sy-vline,
  WA_TXW_VW_INFO-OVERWR, sy-vline,
  WA_TXW_VW_INFO-APPND, sy-vline,
  WA_TXW_VW_INFO-X_NO_DUPS, sy-vline,
  WA_TXW_VW_INFO-VIEWFORMAT, sy-vline,
  WA_TXW_VW_INFO-TAX_VIEW, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TXW_VW_INFO 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_VW_INFO 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_VW_INFO INTO WA_TXW_VW_INFO.


*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 GJAHR, internal->external for field FISC_YEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_TXW_VW_INFO-FISC_YEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_VW_INFO-FISC_YEAR.
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_VW_INFO_STR, 
METADATA TYPE STRING,
PARAMS TYPE STRING,
EXPRT_FLG TYPE STRING,
FILENAME TYPE STRING,
VOL_DIR TYPE STRING,
TEXT TYPE STRING,
OVERWR TYPE STRING,
APPND TYPE STRING,
X_NO_DUPS TYPE STRING,
VIEWFORMAT TYPE STRING,
TAX_VIEW TYPE STRING,
FISC_YEAR TYPE STRING,
XTRCT_UUID TYPE STRING,
HEADERLINES TYPE STRING,
MAXHITS TYPE STRING,
STARTROW TYPE STRING,
SELDATE TYPE STRING,
SELTIME TYPE STRING,
SELUSER TYPE STRING,
REFTAX_VIEW TYPE STRING,
VWLOG_UUID TYPE STRING,
TOTAL_RECORDS TYPE STRING,
USE_DDIC TYPE STRING,
PREFIX TYPE STRING,
SUFFIX TYPE STRING,
USE_DB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TXW_VW_INFO_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_VW_INFO_STR-METADATA sy-vline 
WA_TXW_VW_INFO_STR-PARAMS sy-vline 
WA_TXW_VW_INFO_STR-EXPRT_FLG sy-vline 
WA_TXW_VW_INFO_STR-FILENAME sy-vline 
WA_TXW_VW_INFO_STR-VOL_DIR sy-vline 
WA_TXW_VW_INFO_STR-TEXT sy-vline 
WA_TXW_VW_INFO_STR-OVERWR sy-vline 
WA_TXW_VW_INFO_STR-APPND sy-vline 
WA_TXW_VW_INFO_STR-X_NO_DUPS sy-vline 
WA_TXW_VW_INFO_STR-VIEWFORMAT sy-vline 
WA_TXW_VW_INFO_STR-TAX_VIEW sy-vline 
WA_TXW_VW_INFO_STR-FISC_YEAR sy-vline 
WA_TXW_VW_INFO_STR-XTRCT_UUID sy-vline 
WA_TXW_VW_INFO_STR-HEADERLINES sy-vline 
WA_TXW_VW_INFO_STR-MAXHITS sy-vline 
WA_TXW_VW_INFO_STR-STARTROW sy-vline 
WA_TXW_VW_INFO_STR-SELDATE sy-vline 
WA_TXW_VW_INFO_STR-SELTIME sy-vline 
WA_TXW_VW_INFO_STR-SELUSER sy-vline 
WA_TXW_VW_INFO_STR-REFTAX_VIEW sy-vline 
WA_TXW_VW_INFO_STR-VWLOG_UUID sy-vline 
WA_TXW_VW_INFO_STR-TOTAL_RECORDS sy-vline 
WA_TXW_VW_INFO_STR-USE_DDIC sy-vline 
WA_TXW_VW_INFO_STR-PREFIX sy-vline 
WA_TXW_VW_INFO_STR-SUFFIX sy-vline 
WA_TXW_VW_INFO_STR-USE_DB sy-vline      INTO ld_text SEPARATED BY SPACE.

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