ABAP Select data from SAP table P2RB_PENS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P2RB_PENS 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 P2RB_PENS. 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 P2RB_PENS 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_P2RB_PENS TYPE STANDARD TABLE OF P2RB_PENS,
      WA_P2RB_PENS TYPE P2RB_PENS,
      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: <P2RB_PENS> TYPE P2RB_PENS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P2RB_PENS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P2RB_PENS
  INTO TABLE IT_P2RB_PENS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P2RB_PENS
*  INTO TABLE @DATA(IT_P2RB_PENS2).
*--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_P2RB_PENS INDEX 1 INTO DATA(WA_P2RB_PENS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P2RB_PENS ASSIGNING <P2RB_PENS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P2RB_PENS>-MANDT = 1.
<P2RB_PENS>-DCT_PERNR = 1.
<P2RB_PENS>-DCT_SEQNR = 1.
<P2RB_PENS>-DCT_ROWID = 1.
<P2RB_PENS>-PERIO = 1.

ENDLOOP.

LOOP AT IT_P2RB_PENS INTO WA_P2RB_PENS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P2RB_PENS-CAFRD, sy-vline,
  WA_P2RB_PENS-CAFRN, sy-vline,
  WA_P2RB_PENS-LGART, sy-vline,
  WA_P2RB_PENS-ZFPER, sy-vline,
  WA_P2RB_PENS-ZDATE, sy-vline,
  WA_P2RB_PENS-WAERS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P2RB_PENS 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_P2RB_PENS 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_P2RB_PENS INTO WA_P2RB_PENS.


*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_P2RB_PENS_STR, 
MANDT TYPE STRING,
DCT_PERNR TYPE STRING,
DCT_SEQNR TYPE STRING,
DCT_ROWID TYPE STRING,
PERIO TYPE STRING,
CAFRD TYPE STRING,
CAFRN TYPE STRING,
LGART TYPE STRING,
ZFPER TYPE STRING,
ZDATE TYPE STRING,
WAERS TYPE STRING,
BETRG TYPE STRING,
REFNR TYPE STRING,
PENFN TYPE STRING,
ORADV TYPE STRING,
COZIV TYPE STRING,
KINPE TYPE STRING,
JURST TYPE STRING,
KINCA TYPE STRING,
BETRT TYPE STRING,
BETPT TYPE STRING,
ANZHT TYPE STRING,
BETRS TYPE STRING,
BETPS TYPE STRING,
ANZHS TYPE STRING,
SIGN1 TYPE STRING,
BETRO TYPE STRING,
BETPO TYPE STRING,
ANZHO TYPE STRING,
SIGN2 TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
OBJPS TYPE STRING,
COADV TYPE STRING,
INSTN TYPE STRING,
ENDVA TYPE STRING,
CANCL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P2RB_PENS_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_P2RB_PENS_STR-MANDT sy-vline 
WA_P2RB_PENS_STR-DCT_PERNR sy-vline 
WA_P2RB_PENS_STR-DCT_SEQNR sy-vline 
WA_P2RB_PENS_STR-DCT_ROWID sy-vline 
WA_P2RB_PENS_STR-PERIO sy-vline 
WA_P2RB_PENS_STR-CAFRD sy-vline 
WA_P2RB_PENS_STR-CAFRN sy-vline 
WA_P2RB_PENS_STR-LGART sy-vline 
WA_P2RB_PENS_STR-ZFPER sy-vline 
WA_P2RB_PENS_STR-ZDATE sy-vline 
WA_P2RB_PENS_STR-WAERS sy-vline 
WA_P2RB_PENS_STR-BETRG sy-vline 
WA_P2RB_PENS_STR-REFNR sy-vline 
WA_P2RB_PENS_STR-PENFN sy-vline 
WA_P2RB_PENS_STR-ORADV sy-vline 
WA_P2RB_PENS_STR-COZIV sy-vline 
WA_P2RB_PENS_STR-KINPE sy-vline 
WA_P2RB_PENS_STR-JURST sy-vline 
WA_P2RB_PENS_STR-KINCA sy-vline 
WA_P2RB_PENS_STR-BETRT sy-vline 
WA_P2RB_PENS_STR-BETPT sy-vline 
WA_P2RB_PENS_STR-ANZHT sy-vline 
WA_P2RB_PENS_STR-BETRS sy-vline 
WA_P2RB_PENS_STR-BETPS sy-vline 
WA_P2RB_PENS_STR-ANZHS sy-vline 
WA_P2RB_PENS_STR-SIGN1 sy-vline 
WA_P2RB_PENS_STR-BETRO sy-vline 
WA_P2RB_PENS_STR-BETPO sy-vline 
WA_P2RB_PENS_STR-ANZHO sy-vline 
WA_P2RB_PENS_STR-SIGN2 sy-vline 
WA_P2RB_PENS_STR-BEGDA sy-vline 
WA_P2RB_PENS_STR-ENDDA sy-vline 
WA_P2RB_PENS_STR-OBJPS sy-vline 
WA_P2RB_PENS_STR-COADV sy-vline 
WA_P2RB_PENS_STR-INSTN sy-vline 
WA_P2RB_PENS_STR-ENDVA sy-vline 
WA_P2RB_PENS_STR-CANCL sy-vline      INTO ld_text SEPARATED BY SPACE.

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