ABAP Select data from SAP table V_N1PRECOBJTYPE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_N1PRECOBJTYPE 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_N1PRECOBJTYPE. 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_N1PRECOBJTYPE 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_N1PRECOBJTYPE TYPE STANDARD TABLE OF V_N1PRECOBJTYPE,
      WA_V_N1PRECOBJTYPE TYPE V_N1PRECOBJTYPE,
      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_N1PRECOBJTYPE> TYPE V_N1PRECOBJTYPE.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_N1PRECOBJTYPE.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_N1PRECOBJTYPE
  INTO TABLE IT_V_N1PRECOBJTYPE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_N1PRECOBJTYPE
*  INTO TABLE @DATA(IT_V_N1PRECOBJTYPE2).
*--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_N1PRECOBJTYPE INDEX 1 INTO DATA(WA_V_N1PRECOBJTYPE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_N1PRECOBJTYPE ASSIGNING <V_N1PRECOBJTYPE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_N1PRECOBJTYPE>-MANDT = 1.
<V_N1PRECOBJTYPE>-OBJTYPEID = 1.
<V_N1PRECOBJTYPE>-ERDAT = 1.
<V_N1PRECOBJTYPE>-ERTIM = 1.
<V_N1PRECOBJTYPE>-ERUSR = 1.

ENDLOOP.

LOOP AT IT_V_N1PRECOBJTYPE INTO WA_V_N1PRECOBJTYPE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_N1PRECOBJTYPE-UPDAT, sy-vline,
  WA_V_N1PRECOBJTYPE-UPTIM, sy-vline,
  WA_V_N1PRECOBJTYPE-UPUSR, sy-vline,
  WA_V_N1PRECOBJTYPE-NAME, sy-vline,
  WA_V_N1PRECOBJTYPE-DESCR, sy-vline,
  WA_V_N1PRECOBJTYPE-TRANSFORM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_N1PRECOBJTYPE 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_N1PRECOBJTYPE 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_N1PRECOBJTYPE INTO WA_V_N1PRECOBJTYPE.


*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_N1PRECOBJTYPE_STR, 
MANDT TYPE STRING,
OBJTYPEID TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
ERUSR TYPE STRING,
UPDAT TYPE STRING,
UPTIM TYPE STRING,
UPUSR TYPE STRING,
NAME TYPE STRING,
DESCR TYPE STRING,
TRANSFORM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_N1PRECOBJTYPE_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_N1PRECOBJTYPE_STR-MANDT sy-vline 
WA_V_N1PRECOBJTYPE_STR-OBJTYPEID sy-vline 
WA_V_N1PRECOBJTYPE_STR-ERDAT sy-vline 
WA_V_N1PRECOBJTYPE_STR-ERTIM sy-vline 
WA_V_N1PRECOBJTYPE_STR-ERUSR sy-vline 
WA_V_N1PRECOBJTYPE_STR-UPDAT sy-vline 
WA_V_N1PRECOBJTYPE_STR-UPTIM sy-vline 
WA_V_N1PRECOBJTYPE_STR-UPUSR sy-vline 
WA_V_N1PRECOBJTYPE_STR-NAME sy-vline 
WA_V_N1PRECOBJTYPE_STR-DESCR sy-vline 
WA_V_N1PRECOBJTYPE_STR-TRANSFORM sy-vline      INTO ld_text SEPARATED BY SPACE.

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