ABAP Select data from SAP table P2RD_ANVERS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P2RD_ANVERS 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 P2RD_ANVERS. 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 P2RD_ANVERS 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_P2RD_ANVERS TYPE STANDARD TABLE OF P2RD_ANVERS,
      WA_P2RD_ANVERS TYPE P2RD_ANVERS,
      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: <P2RD_ANVERS> TYPE P2RD_ANVERS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P2RD_ANVERS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P2RD_ANVERS
  INTO TABLE IT_P2RD_ANVERS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P2RD_ANVERS
*  INTO TABLE @DATA(IT_P2RD_ANVERS2).
*--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_P2RD_ANVERS INDEX 1 INTO DATA(WA_P2RD_ANVERS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P2RD_ANVERS ASSIGNING <P2RD_ANVERS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P2RD_ANVERS>-MANDT = 1.
<P2RD_ANVERS>-DCT_PERNR = 1.
<P2RD_ANVERS>-DCT_SEQNR = 1.
<P2RD_ANVERS>-DCT_ROWID = 1.
<P2RD_ANVERS>-ANRVB = 1.

ENDLOOP.

LOOP AT IT_P2RD_ANVERS INTO WA_P2RD_ANVERS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P2RD_ANVERS-DUMMY1, sy-vline,
  WA_P2RD_ANVERS-BETRG, sy-vline,
  WA_P2RD_ANVERS-WAERS, sy-vline,
  WA_P2RD_ANVERS-DUMMY2, sy-vline,
  WA_P2RD_ANVERS-DUMMY3, sy-vline,
  WA_P2RD_ANVERS-DUMMY4, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P2RD_ANVERS 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_P2RD_ANVERS 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_P2RD_ANVERS INTO WA_P2RD_ANVERS.


*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_P2RD_ANVERS_STR, 
MANDT TYPE STRING,
DCT_PERNR TYPE STRING,
DCT_SEQNR TYPE STRING,
DCT_ROWID TYPE STRING,
ANRVB TYPE STRING,
DUMMY1 TYPE STRING,
BETRG TYPE STRING,
WAERS TYPE STRING,
DUMMY2 TYPE STRING,
DUMMY3 TYPE STRING,
DUMMY4 TYPE STRING,
DUMMY5 TYPE STRING,
VORDZ TYPE STRING,
VERSJ TYPE STRING,
KZFRB TYPE STRING,
KNZRE TYPE STRING,
BEREI TYPE STRING,
OBJPS TYPE STRING,
KNDEP TYPE STRING,
KGSEP TYPE STRING,
FRWEP TYPE STRING,
GESEP TYPE STRING,
HVERS TYPE STRING,
HVBTR TYPE STRING,
RRBTR TYPE STRING,
RRWAE TYPE STRING,
VAVEP TYPE STRING,
VABEP TYPE STRING,
ZUFAK TYPE STRING,
ENTPK TYPE STRING,
PABNR_2 TYPE STRING,
TRFGB TYPE STRING,
RENTENARTFAKTOR TYPE STRING,
UNGEK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P2RD_ANVERS_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_P2RD_ANVERS_STR-MANDT sy-vline 
WA_P2RD_ANVERS_STR-DCT_PERNR sy-vline 
WA_P2RD_ANVERS_STR-DCT_SEQNR sy-vline 
WA_P2RD_ANVERS_STR-DCT_ROWID sy-vline 
WA_P2RD_ANVERS_STR-ANRVB sy-vline 
WA_P2RD_ANVERS_STR-DUMMY1 sy-vline 
WA_P2RD_ANVERS_STR-BETRG sy-vline 
WA_P2RD_ANVERS_STR-WAERS sy-vline 
WA_P2RD_ANVERS_STR-DUMMY2 sy-vline 
WA_P2RD_ANVERS_STR-DUMMY3 sy-vline 
WA_P2RD_ANVERS_STR-DUMMY4 sy-vline 
WA_P2RD_ANVERS_STR-DUMMY5 sy-vline 
WA_P2RD_ANVERS_STR-VORDZ sy-vline 
WA_P2RD_ANVERS_STR-VERSJ sy-vline 
WA_P2RD_ANVERS_STR-KZFRB sy-vline 
WA_P2RD_ANVERS_STR-KNZRE sy-vline 
WA_P2RD_ANVERS_STR-BEREI sy-vline 
WA_P2RD_ANVERS_STR-OBJPS sy-vline 
WA_P2RD_ANVERS_STR-KNDEP sy-vline 
WA_P2RD_ANVERS_STR-KGSEP sy-vline 
WA_P2RD_ANVERS_STR-FRWEP sy-vline 
WA_P2RD_ANVERS_STR-GESEP sy-vline 
WA_P2RD_ANVERS_STR-HVERS sy-vline 
WA_P2RD_ANVERS_STR-HVBTR sy-vline 
WA_P2RD_ANVERS_STR-RRBTR sy-vline 
WA_P2RD_ANVERS_STR-RRWAE sy-vline 
WA_P2RD_ANVERS_STR-VAVEP sy-vline 
WA_P2RD_ANVERS_STR-VABEP sy-vline 
WA_P2RD_ANVERS_STR-ZUFAK sy-vline 
WA_P2RD_ANVERS_STR-ENTPK sy-vline 
WA_P2RD_ANVERS_STR-PABNR_2 sy-vline 
WA_P2RD_ANVERS_STR-TRFGB sy-vline 
WA_P2RD_ANVERS_STR-RENTENARTFAKTOR sy-vline 
WA_P2RD_ANVERS_STR-UNGEK sy-vline      INTO ld_text SEPARATED BY SPACE.

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