ABAP Select data from SAP table V_T51RS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_T51RS 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_T51RS. 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_T51RS 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_T51RS TYPE STANDARD TABLE OF V_T51RS,
      WA_V_T51RS TYPE V_T51RS,
      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_T51RS> TYPE V_T51RS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_T51RS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_T51RS
  INTO TABLE IT_V_T51RS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_T51RS
*  INTO TABLE @DATA(IT_V_T51RS2).
*--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_T51RS INDEX 1 INTO DATA(WA_V_T51RS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_T51RS ASSIGNING <V_T51RS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_T51RS>-MANDT = 1.
<V_T51RS>-CRETY = 1.
<V_T51RS>-CRENR = 1.
<V_T51RS>-ENDDA = 1.
<V_T51RS>-BEGDA = 1.

ENDLOOP.

LOOP AT IT_V_T51RS INTO WA_V_T51RS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_T51RS-RULTX, sy-vline,
  WA_V_T51RS-RULNR, sy-vline,
  WA_V_T51RS-CRETX, sy-vline,
  WA_V_T51RS-DEPOS, sy-vline,
  WA_V_T51RS-DEPLT, sy-vline,
  WA_V_T51RS-LAND1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_T51RS 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_T51RS 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_T51RS INTO WA_V_T51RS.


*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_T51RS_STR, 
MANDT TYPE STRING,
CRETY TYPE STRING,
CRENR TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
RULTX TYPE STRING,
RULNR TYPE STRING,
CRETX TYPE STRING,
DEPOS TYPE STRING,
DEPLT TYPE STRING,
LAND1 TYPE STRING,
ZLSCH TYPE STRING,
GRANR TYPE STRING,
GRATY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_T51RS_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_T51RS_STR-MANDT sy-vline 
WA_V_T51RS_STR-CRETY sy-vline 
WA_V_T51RS_STR-CRENR sy-vline 
WA_V_T51RS_STR-ENDDA sy-vline 
WA_V_T51RS_STR-BEGDA sy-vline 
WA_V_T51RS_STR-RULTX sy-vline 
WA_V_T51RS_STR-RULNR sy-vline 
WA_V_T51RS_STR-CRETX sy-vline 
WA_V_T51RS_STR-DEPOS sy-vline 
WA_V_T51RS_STR-DEPLT sy-vline 
WA_V_T51RS_STR-LAND1 sy-vline 
WA_V_T51RS_STR-ZLSCH sy-vline 
WA_V_T51RS_STR-GRANR sy-vline 
WA_V_T51RS_STR-GRATY sy-vline      INTO ld_text SEPARATED BY SPACE.

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