ABAP Select data from SAP table P2RG_PENS into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP P2RG_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 P2RG_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 P2RG_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_P2RG_PENS TYPE STANDARD TABLE OF P2RG_PENS,
      WA_P2RG_PENS TYPE P2RG_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: <P2RG_PENS> TYPE P2RG_PENS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P2RG_PENS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P2RG_PENS
  INTO TABLE IT_P2RG_PENS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P2RG_PENS
*  INTO TABLE @DATA(IT_P2RG_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_P2RG_PENS INDEX 1 INTO DATA(WA_P2RG_PENS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P2RG_PENS ASSIGNING <P2RG_PENS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P2RG_PENS>-MANDT = 1.
<P2RG_PENS>-DCT_PERNR = 1.
<P2RG_PENS>-DCT_SEQNR = 1.
<P2RG_PENS>-DCT_ROWID = 1.
<P2RG_PENS>-SUBTY = 1.

ENDLOOP.

LOOP AT IT_P2RG_PENS INTO WA_P2RG_PENS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P2RG_PENS-OBJPS, sy-vline,
  WA_P2RG_PENS-BEGDA, sy-vline,
  WA_P2RG_PENS-ENDDA, sy-vline,
  WA_P2RG_PENS-SCREF, sy-vline,
  WA_P2RG_PENS-EEREF, sy-vline,
  WA_P2RG_PENS-LOLEV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P2RG_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_P2RG_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_P2RG_PENS INTO WA_P2RG_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_P2RG_PENS_STR, 
MANDT TYPE STRING,
DCT_PERNR TYPE STRING,
DCT_SEQNR TYPE STRING,
DCT_ROWID TYPE STRING,
SUBTY TYPE STRING,
OBJPS TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
SCREF TYPE STRING,
EEREF TYPE STRING,
LOLEV TYPE STRING,
UPLEV TYPE STRING,
PCTEE TYPE STRING,
PCTER TYPE STRING,
PCMEE TYPE STRING,
PCMER TYPE STRING,
PCHIE TYPE STRING,
PCHIR TYPE STRING,
PCEES TYPE STRING,
PCERS TYPE STRING,
FTREE TYPE STRING,
FTRER TYPE STRING,
FTMEE TYPE STRING,
FTMER TYPE STRING,
FTHEE TYPE STRING,
FTHER TYPE STRING,
FTEES TYPE STRING,
FTERS TYPE STRING,
CALEE TYPE STRING,
CALER TYPE STRING,
CLEES TYPE STRING,
CLERS TYPE STRING,
TTEEC TYPE STRING,
TTEES TYPE STRING,
TTERC TYPE STRING,
TTERS TYPE STRING,
PNCAP TYPE STRING,
PENSFLAG TYPE STRING,
PSSCH TYPE STRING,
ACTIV TYPE STRING,
LGMIN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P2RG_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_P2RG_PENS_STR-MANDT sy-vline 
WA_P2RG_PENS_STR-DCT_PERNR sy-vline 
WA_P2RG_PENS_STR-DCT_SEQNR sy-vline 
WA_P2RG_PENS_STR-DCT_ROWID sy-vline 
WA_P2RG_PENS_STR-SUBTY sy-vline 
WA_P2RG_PENS_STR-OBJPS sy-vline 
WA_P2RG_PENS_STR-BEGDA sy-vline 
WA_P2RG_PENS_STR-ENDDA sy-vline 
WA_P2RG_PENS_STR-SCREF sy-vline 
WA_P2RG_PENS_STR-EEREF sy-vline 
WA_P2RG_PENS_STR-LOLEV sy-vline 
WA_P2RG_PENS_STR-UPLEV sy-vline 
WA_P2RG_PENS_STR-PCTEE sy-vline 
WA_P2RG_PENS_STR-PCTER sy-vline 
WA_P2RG_PENS_STR-PCMEE sy-vline 
WA_P2RG_PENS_STR-PCMER sy-vline 
WA_P2RG_PENS_STR-PCHIE sy-vline 
WA_P2RG_PENS_STR-PCHIR sy-vline 
WA_P2RG_PENS_STR-PCEES sy-vline 
WA_P2RG_PENS_STR-PCERS sy-vline 
WA_P2RG_PENS_STR-FTREE sy-vline 
WA_P2RG_PENS_STR-FTRER sy-vline 
WA_P2RG_PENS_STR-FTMEE sy-vline 
WA_P2RG_PENS_STR-FTMER sy-vline 
WA_P2RG_PENS_STR-FTHEE sy-vline 
WA_P2RG_PENS_STR-FTHER sy-vline 
WA_P2RG_PENS_STR-FTEES sy-vline 
WA_P2RG_PENS_STR-FTERS sy-vline 
WA_P2RG_PENS_STR-CALEE sy-vline 
WA_P2RG_PENS_STR-CALER sy-vline 
WA_P2RG_PENS_STR-CLEES sy-vline 
WA_P2RG_PENS_STR-CLERS sy-vline 
WA_P2RG_PENS_STR-TTEEC sy-vline 
WA_P2RG_PENS_STR-TTEES sy-vline 
WA_P2RG_PENS_STR-TTERC sy-vline 
WA_P2RG_PENS_STR-TTERS sy-vline 
WA_P2RG_PENS_STR-PNCAP sy-vline 
WA_P2RG_PENS_STR-PENSFLAG sy-vline 
WA_P2RG_PENS_STR-PSSCH sy-vline 
WA_P2RG_PENS_STR-ACTIV sy-vline 
WA_P2RG_PENS_STR-LGMIN sy-vline      INTO ld_text SEPARATED BY SPACE.

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