ABAP Select data from SAP table V_T301 into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_T301 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_T301. 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_T301 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_T301 TYPE STANDARD TABLE OF V_T301,
      WA_V_T301 TYPE V_T301,
      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_T301> TYPE V_T301.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_T301.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_T301
  INTO TABLE IT_V_T301.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_T301
*  INTO TABLE @DATA(IT_V_T3012).
*--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_T301 INDEX 1 INTO DATA(WA_V_T3012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_T301 ASSIGNING <V_T301>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_T301>-MANDT = 1.
<V_T301>-LGNUM = 1.
<V_T301>-LGTYP = 1.
<V_T301>-LTYPT = 1.
<V_T301>-KZNKO = 1.

ENDLOOP.

LOOP AT IT_V_T301 INTO WA_V_T301.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_T301-KAPAP, sy-vline,
  WA_V_T301-QUEIN, sy-vline,
  WA_V_T301-QUAUS, sy-vline,
  WA_V_T301-VOLLE, sy-vline,
  WA_V_T301-MISCH, sy-vline,
  WA_V_T301-ZULAG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_T301 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_T301 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_T301 INTO WA_V_T301.


*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 SPDEV, internal->external for field LDEST
CALL FUNCTION 'CONVERSION_EXIT_SPDEV_OUTPUT'
  EXPORTING
    input =                      WA_V_T301-LDEST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_T301-LDEST.
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_V_T301_STR, 
MANDT TYPE STRING,
LGNUM TYPE STRING,
LGTYP TYPE STRING,
LTYPT TYPE STRING,
KZNKO TYPE STRING,
KAPAP TYPE STRING,
QUEIN TYPE STRING,
QUAUS TYPE STRING,
VOLLE TYPE STRING,
MISCH TYPE STRING,
ZULAG TYPE STRING,
NEGAT TYPE STRING,
VRUCK TYPE STRING,
UEBER TYPE STRING,
RLTYP TYPE STRING,
STAUS TYPE STRING,
STEIN TYPE STRING,
KZINV TYPE STRING,
SKZEI TYPE STRING,
SKZAU TYPE STRING,
LDEST TYPE STRING,
SFIFO TYPE STRING,
SPEIN TYPE STRING,
SPAUS TYPE STRING,
SPGRU TYPE STRING,
PRLET TYPE STRING,
PRBER TYPE STRING,
WGFKL TYPE STRING,
GEFAL TYPE STRING,
KZUAP TYPE STRING,
INVPE TYPE STRING,
INVPN TYPE STRING,
LNUMT TYPE STRING,
SPGTX TYPE STRING,
LENVW TYPE STRING,
IPUNK TYPE STRING,
IPTYP TYPE STRING,
KPUNK TYPE STRING,
KPTYP TYPE STRING,
BWWMP TYPE STRING,
USEIN TYPE STRING,
USAUS TYPE STRING,
MAILK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_T301_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_T301_STR-MANDT sy-vline 
WA_V_T301_STR-LGNUM sy-vline 
WA_V_T301_STR-LGTYP sy-vline 
WA_V_T301_STR-LTYPT sy-vline 
WA_V_T301_STR-KZNKO sy-vline 
WA_V_T301_STR-KAPAP sy-vline 
WA_V_T301_STR-QUEIN sy-vline 
WA_V_T301_STR-QUAUS sy-vline 
WA_V_T301_STR-VOLLE sy-vline 
WA_V_T301_STR-MISCH sy-vline 
WA_V_T301_STR-ZULAG sy-vline 
WA_V_T301_STR-NEGAT sy-vline 
WA_V_T301_STR-VRUCK sy-vline 
WA_V_T301_STR-UEBER sy-vline 
WA_V_T301_STR-RLTYP sy-vline 
WA_V_T301_STR-STAUS sy-vline 
WA_V_T301_STR-STEIN sy-vline 
WA_V_T301_STR-KZINV sy-vline 
WA_V_T301_STR-SKZEI sy-vline 
WA_V_T301_STR-SKZAU sy-vline 
WA_V_T301_STR-LDEST sy-vline 
WA_V_T301_STR-SFIFO sy-vline 
WA_V_T301_STR-SPEIN sy-vline 
WA_V_T301_STR-SPAUS sy-vline 
WA_V_T301_STR-SPGRU sy-vline 
WA_V_T301_STR-PRLET sy-vline 
WA_V_T301_STR-PRBER sy-vline 
WA_V_T301_STR-WGFKL sy-vline 
WA_V_T301_STR-GEFAL sy-vline 
WA_V_T301_STR-KZUAP sy-vline 
WA_V_T301_STR-INVPE sy-vline 
WA_V_T301_STR-INVPN sy-vline 
WA_V_T301_STR-LNUMT sy-vline 
WA_V_T301_STR-SPGTX sy-vline 
WA_V_T301_STR-LENVW sy-vline 
WA_V_T301_STR-IPUNK sy-vline 
WA_V_T301_STR-IPTYP sy-vline 
WA_V_T301_STR-KPUNK sy-vline 
WA_V_T301_STR-KPTYP sy-vline 
WA_V_T301_STR-BWWMP sy-vline 
WA_V_T301_STR-USEIN sy-vline 
WA_V_T301_STR-USAUS sy-vline 
WA_V_T301_STR-MAILK sy-vline      INTO ld_text SEPARATED BY SPACE.

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