ABAP Select data from SAP table V_TQ79 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_TQ79 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_TQ79. 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_TQ79 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_TQ79 TYPE STANDARD TABLE OF V_TQ79,
      WA_V_TQ79 TYPE V_TQ79,
      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_TQ79> TYPE V_TQ79.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_TQ79.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_TQ79
  INTO TABLE IT_V_TQ79.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_TQ79
*  INTO TABLE @DATA(IT_V_TQ792).
*--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_TQ79 INDEX 1 INTO DATA(WA_V_TQ792).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_TQ79 ASSIGNING <V_TQ79>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_TQ79>-MANDT = 1.
<V_TQ79>-SLWBEZ = 1.
<V_TQ79>-PPKTTYP = 1.
<V_TQ79>-KURZTEXT = 1.
<V_TQ79>-EQUNRAKT = 1.

ENDLOOP.

LOOP AT IT_V_TQ79 INTO WA_V_TQ79.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_TQ79-EQUNRSLW, sy-vline,
  WA_V_TQ79-TPLNRAKT, sy-vline,
  WA_V_TQ79-TPLNRSLW, sy-vline,
  WA_V_TQ79-PHYNRAKT, sy-vline,
  WA_V_TQ79-PHYNRSLW, sy-vline,
  WA_V_TQ79-SFI_AKT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_TQ79 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_TQ79 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_TQ79 INTO WA_V_TQ79.


*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_TQ79_STR, 
MANDT TYPE STRING,
SLWBEZ TYPE STRING,
PPKTTYP TYPE STRING,
KURZTEXT TYPE STRING,
EQUNRAKT TYPE STRING,
EQUNRSLW TYPE STRING,
TPLNRAKT TYPE STRING,
TPLNRSLW TYPE STRING,
PHYNRAKT TYPE STRING,
PHYNRSLW TYPE STRING,
SFI_AKT TYPE STRING,
SFI_ID_SLW TYPE STRING,
USERC1AKT TYPE STRING,
USERC1SLW TYPE STRING,
USERC2AKT TYPE STRING,
USERC2SLW TYPE STRING,
USERN1AKT TYPE STRING,
USERN1SLW TYPE STRING,
USERN2AKT TYPE STRING,
USERN2SLW TYPE STRING,
USERD1AKT TYPE STRING,
USERD1SLW TYPE STRING,
USERT1AKT TYPE STRING,
USERT1SLW TYPE STRING,
PPVEMENGE TYPE STRING,
PPVEWERK TYPE STRING,
PPVECODGRA TYPE STRING,
PPVECODEA TYPE STRING,
PPVECODGRR TYPE STRING,
PPVECODER TYPE STRING,
PROBEANZ TYPE STRING,
LAST_VALID TYPE STRING,
FUNCTION1 TYPE STRING,
FUNCTION1_ACT TYPE STRING,
FUNCTION2 TYPE STRING,
FUNCTION2_ACT TYPE STRING,
FUNCTION3 TYPE STRING,
FUNCTION3_ACT TYPE STRING,
FUNCTION4 TYPE STRING,
FUNCTION4_ACT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_TQ79_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_TQ79_STR-MANDT sy-vline 
WA_V_TQ79_STR-SLWBEZ sy-vline 
WA_V_TQ79_STR-PPKTTYP sy-vline 
WA_V_TQ79_STR-KURZTEXT sy-vline 
WA_V_TQ79_STR-EQUNRAKT sy-vline 
WA_V_TQ79_STR-EQUNRSLW sy-vline 
WA_V_TQ79_STR-TPLNRAKT sy-vline 
WA_V_TQ79_STR-TPLNRSLW sy-vline 
WA_V_TQ79_STR-PHYNRAKT sy-vline 
WA_V_TQ79_STR-PHYNRSLW sy-vline 
WA_V_TQ79_STR-SFI_AKT sy-vline 
WA_V_TQ79_STR-SFI_ID_SLW sy-vline 
WA_V_TQ79_STR-USERC1AKT sy-vline 
WA_V_TQ79_STR-USERC1SLW sy-vline 
WA_V_TQ79_STR-USERC2AKT sy-vline 
WA_V_TQ79_STR-USERC2SLW sy-vline 
WA_V_TQ79_STR-USERN1AKT sy-vline 
WA_V_TQ79_STR-USERN1SLW sy-vline 
WA_V_TQ79_STR-USERN2AKT sy-vline 
WA_V_TQ79_STR-USERN2SLW sy-vline 
WA_V_TQ79_STR-USERD1AKT sy-vline 
WA_V_TQ79_STR-USERD1SLW sy-vline 
WA_V_TQ79_STR-USERT1AKT sy-vline 
WA_V_TQ79_STR-USERT1SLW sy-vline 
WA_V_TQ79_STR-PPVEMENGE sy-vline 
WA_V_TQ79_STR-PPVEWERK sy-vline 
WA_V_TQ79_STR-PPVECODGRA sy-vline 
WA_V_TQ79_STR-PPVECODEA sy-vline 
WA_V_TQ79_STR-PPVECODGRR sy-vline 
WA_V_TQ79_STR-PPVECODER sy-vline 
WA_V_TQ79_STR-PROBEANZ sy-vline 
WA_V_TQ79_STR-LAST_VALID sy-vline 
WA_V_TQ79_STR-FUNCTION1 sy-vline 
WA_V_TQ79_STR-FUNCTION1_ACT sy-vline 
WA_V_TQ79_STR-FUNCTION2 sy-vline 
WA_V_TQ79_STR-FUNCTION2_ACT sy-vline 
WA_V_TQ79_STR-FUNCTION3 sy-vline 
WA_V_TQ79_STR-FUNCTION3_ACT sy-vline 
WA_V_TQ79_STR-FUNCTION4 sy-vline 
WA_V_TQ79_STR-FUNCTION4_ACT sy-vline      INTO ld_text SEPARATED BY SPACE.

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