ABAP Select data from SAP table V_TWUF_EVENT_TO_ID_QUERY_RO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_TWUF_EVENT_TO_ID_QUERY_RO
*  INTO TABLE @DATA(IT_V_TWUF_EVENT_TO_ID_QUERY_RO2).
*--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_V_TWUF_EVENT_TO_ID_QUERY_RO INDEX 1 INTO DATA(WA_V_TWUF_EVENT_TO_ID_QUERY_RO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_TWUF_EVENT_TO_ID_QUERY_RO>-APPLICATION = 1.
<V_TWUF_EVENT_TO_ID_QUERY_RO>-EVENT = 1.
<V_TWUF_EVENT_TO_ID_QUERY_RO>-SOURCE_STRUCTURE = 1.
<V_TWUF_EVENT_TO_ID_QUERY_RO>-TARGET_STRUCTURE = 1.
<V_TWUF_EVENT_TO_ID_QUERY_RO>-PRED1_STRUCTURE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_TWUF_EVENT_TO_ID_QUERY_RO-PRED2_STRUCTURE, sy-vline,
  WA_V_TWUF_EVENT_TO_ID_QUERY_RO-PRED3_STRUCTURE, sy-vline,
  WA_V_TWUF_EVENT_TO_ID_QUERY_RO-PRED4_STRUCTURE, sy-vline,
  WA_V_TWUF_EVENT_TO_ID_QUERY_RO-ADD1, sy-vline,
  WA_V_TWUF_EVENT_TO_ID_QUERY_RO-ADD2, sy-vline,
  WA_V_TWUF_EVENT_TO_ID_QUERY_RO-ADD3, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_TWUF_EVENT_TO_ID_QUERY_RO 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_V_TWUF_EVENT_TO_ID_QUERY_RO 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_V_TWUF_EVENT_TO_ID_QUERY_RO INTO WA_V_TWUF_EVENT_TO_ID_QUERY_RO.


*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_V_TWUF_EVENT_TO_ID_QUERY_RO_STR, 
APPLICATION TYPE STRING,
EVENT TYPE STRING,
SOURCE_STRUCTURE TYPE STRING,
TARGET_STRUCTURE TYPE STRING,
PRED1_STRUCTURE TYPE STRING,
PRED2_STRUCTURE TYPE STRING,
PRED3_STRUCTURE TYPE STRING,
PRED4_STRUCTURE TYPE STRING,
ADD1 TYPE STRING,
ADD2 TYPE STRING,
ADD3 TYPE STRING,
ADD4 TYPE STRING,
ADD5 TYPE STRING,
ADD6 TYPE STRING,
ADD7 TYPE STRING,
ADD8 TYPE STRING,
ADD9 TYPE STRING,
ADD10 TYPE STRING,
ADD11 TYPE STRING,
ADD12 TYPE STRING,
ADD13 TYPE STRING,
ADD14 TYPE STRING,
ADD15 TYPE STRING,
ADD16 TYPE STRING,
ADD17 TYPE STRING,
ADD18 TYPE STRING,
ADD19 TYPE STRING,
ADD20 TYPE STRING,
CHANGE_STRUCTURE TYPE STRING,
TARGET_KEY_STRUC TYPE STRING,
TEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_TWUF_EVENT_TO_ID_QUERY_RO_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_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-APPLICATION sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-EVENT sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-SOURCE_STRUCTURE sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-TARGET_STRUCTURE sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-PRED1_STRUCTURE sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-PRED2_STRUCTURE sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-PRED3_STRUCTURE sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-PRED4_STRUCTURE sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-ADD1 sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-ADD2 sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-ADD3 sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-ADD4 sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-ADD5 sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-ADD6 sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-ADD7 sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-ADD8 sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-ADD9 sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-ADD10 sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-ADD11 sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-ADD12 sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-ADD13 sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-ADD14 sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-ADD15 sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-ADD16 sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-ADD17 sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-ADD18 sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-ADD19 sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-ADD20 sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-CHANGE_STRUCTURE sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-TARGET_KEY_STRUC sy-vline 
WA_V_TWUF_EVENT_TO_ID_QUERY_RO_STR-TEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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