ABAP Select data from SAP table TRSTHV_VP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TRSTHV_VP
*  INTO TABLE @DATA(IT_TRSTHV_VP2).
*--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_TRSTHV_VP INDEX 1 INTO DATA(WA_TRSTHV_VP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TRSTHV_VP>-MANDT = 1.
<TRSTHV_VP>-HIEID = 1.
<TRSTHV_VP>-APPL = 1.
<TRSTHV_VP>-TABNM = 1.
<TRSTHV_VP>-FIENM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TRSTHV_VP-ROLNM, sy-vline,
  WA_TRSTHV_VP-DOMNM, sy-vline,
  WA_TRSTHV_VP-HCLASS, sy-vline,
  WA_TRSTHV_VP-HIENM, sy-vline,
  WA_TRSTHV_VP-TIMESTMP, sy-vline,
  WA_TRSTHV_VP-INFOPROV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TRSTHV_VP 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_TRSTHV_VP 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_TRSTHV_VP INTO WA_TRSTHV_VP.


*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_TRSTHV_VP_STR, 
MANDT TYPE STRING,
HIEID TYPE STRING,
APPL TYPE STRING,
TABNM TYPE STRING,
FIENM TYPE STRING,
ROLNM TYPE STRING,
DOMNM TYPE STRING,
HCLASS TYPE STRING,
HIENM TYPE STRING,
TIMESTMP TYPE STRING,
INFOPROV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TRSTHV_VP_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_TRSTHV_VP_STR-MANDT sy-vline 
WA_TRSTHV_VP_STR-HIEID sy-vline 
WA_TRSTHV_VP_STR-APPL sy-vline 
WA_TRSTHV_VP_STR-TABNM sy-vline 
WA_TRSTHV_VP_STR-FIENM sy-vline 
WA_TRSTHV_VP_STR-ROLNM sy-vline 
WA_TRSTHV_VP_STR-DOMNM sy-vline 
WA_TRSTHV_VP_STR-HCLASS sy-vline 
WA_TRSTHV_VP_STR-HIENM sy-vline 
WA_TRSTHV_VP_STR-TIMESTMP sy-vline 
WA_TRSTHV_VP_STR-INFOPROV sy-vline      INTO ld_text SEPARATED BY SPACE.

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