ABAP Select data from SAP table P01VM_DBPN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P01VM_DBPN 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 P01VM_DBPN. 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 P01VM_DBPN 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_P01VM_DBPN TYPE STANDARD TABLE OF P01VM_DBPN,
      WA_P01VM_DBPN TYPE P01VM_DBPN,
      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: <P01VM_DBPN> TYPE P01VM_DBPN.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P01VM_DBPN.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P01VM_DBPN
  INTO TABLE IT_P01VM_DBPN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P01VM_DBPN
*  INTO TABLE @DATA(IT_P01VM_DBPN2).
*--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_P01VM_DBPN INDEX 1 INTO DATA(WA_P01VM_DBPN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P01VM_DBPN ASSIGNING <P01VM_DBPN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P01VM_DBPN>-MANDT = 1.
<P01VM_DBPN>-GUID = 1.
<P01VM_DBPN>-LFDNR = 1.
<P01VM_DBPN>-PERNR = 1.
<P01VM_DBPN>-GESCH = 1.

ENDLOOP.

LOOP AT IT_P01VM_DBPN INTO WA_P01VM_DBPN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P01VM_DBPN-GEBDAT, sy-vline,
  WA_P01VM_DBPN-HIRE, sy-vline,
  WA_P01VM_DBPN-PGRD3, sy-vline,
  WA_P01VM_DBPN-TTSC, sy-vline,
  WA_P01VM_DBPN-NATIO, sy-vline,
  WA_P01VM_DBPN-STDBEZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P01VM_DBPN 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_P01VM_DBPN 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_P01VM_DBPN INTO WA_P01VM_DBPN.


*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_P01VM_DBPN_STR, 
MANDT TYPE STRING,
GUID TYPE STRING,
LFDNR TYPE STRING,
PERNR TYPE STRING,
GESCH TYPE STRING,
GEBDAT TYPE STRING,
HIRE TYPE STRING,
PGRD3 TYPE STRING,
TTSC TYPE STRING,
NATIO TYPE STRING,
STDBEZ TYPE STRING,
MESTD TYPE STRING,
VERD_GES TYPE STRING,
VERD_SONST TYPE STRING,
VERD_UEBER TYPE STRING,
VERD_ZUSCH TYPE STRING,
VERD_UMW TYPE STRING,
KKUG TYPE STRING,
SKUG TYPE STRING,
STREIK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P01VM_DBPN_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_P01VM_DBPN_STR-MANDT sy-vline 
WA_P01VM_DBPN_STR-GUID sy-vline 
WA_P01VM_DBPN_STR-LFDNR sy-vline 
WA_P01VM_DBPN_STR-PERNR sy-vline 
WA_P01VM_DBPN_STR-GESCH sy-vline 
WA_P01VM_DBPN_STR-GEBDAT sy-vline 
WA_P01VM_DBPN_STR-HIRE sy-vline 
WA_P01VM_DBPN_STR-PGRD3 sy-vline 
WA_P01VM_DBPN_STR-TTSC sy-vline 
WA_P01VM_DBPN_STR-NATIO sy-vline 
WA_P01VM_DBPN_STR-STDBEZ sy-vline 
WA_P01VM_DBPN_STR-MESTD sy-vline 
WA_P01VM_DBPN_STR-VERD_GES sy-vline 
WA_P01VM_DBPN_STR-VERD_SONST sy-vline 
WA_P01VM_DBPN_STR-VERD_UEBER sy-vline 
WA_P01VM_DBPN_STR-VERD_ZUSCH sy-vline 
WA_P01VM_DBPN_STR-VERD_UMW sy-vline 
WA_P01VM_DBPN_STR-KKUG sy-vline 
WA_P01VM_DBPN_STR-SKUG sy-vline 
WA_P01VM_DBPN_STR-STREIK sy-vline      INTO ld_text SEPARATED BY SPACE.

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