ABAP Select data from SAP table P2RT_ST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P2RT_ST 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 P2RT_ST. 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 P2RT_ST 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_P2RT_ST TYPE STANDARD TABLE OF P2RT_ST,
      WA_P2RT_ST TYPE P2RT_ST,
      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: <P2RT_ST> TYPE P2RT_ST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P2RT_ST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P2RT_ST
  INTO TABLE IT_P2RT_ST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P2RT_ST
*  INTO TABLE @DATA(IT_P2RT_ST2).
*--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_P2RT_ST INDEX 1 INTO DATA(WA_P2RT_ST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P2RT_ST ASSIGNING <P2RT_ST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P2RT_ST>-MANDT = 1.
<P2RT_ST>-DCT_PERNR = 1.
<P2RT_ST>-DCT_SEQNR = 1.
<P2RT_ST>-DCT_ROWID = 1.
<P2RT_ST>-CNTR2 = 1.

ENDLOOP.

LOOP AT IT_P2RT_ST INTO WA_P2RT_ST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P2RT_ST-BEGDA, sy-vline,
  WA_P2RT_ST-ENDDA, sy-vline,
  WA_P2RT_ST-TTKF1, sy-vline,
  WA_P2RT_ST-TTKF2, sy-vline,
  WA_P2RT_ST-LZZRM, sy-vline,
  WA_P2RT_ST-STAGE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P2RT_ST 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_P2RT_ST 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_P2RT_ST INTO WA_P2RT_ST.


*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_P2RT_ST_STR, 
MANDT TYPE STRING,
DCT_PERNR TYPE STRING,
DCT_SEQNR TYPE STRING,
DCT_ROWID TYPE STRING,
CNTR2 TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
TTKF1 TYPE STRING,
TTKF2 TYPE STRING,
LZZRM TYPE STRING,
STAGE TYPE STRING,
TTFB0 TYPE STRING,
TTFB1 TYPE STRING,
TTFB2 TYPE STRING,
TTFB3 TYPE STRING,
TTFB4 TYPE STRING,
TTFC1 TYPE STRING,
TTFC2 TYPE STRING,
TTFC3 TYPE STRING,
TTFC4 TYPE STRING,
TTFC5 TYPE STRING,
TTFD1 TYPE STRING,
TTFD2 TYPE STRING,
STFRG TYPE STRING,
STBFG TYPE STRING,
STRSO TYPE STRING,
STRS2 TYPE STRING,
USCHR TYPE STRING,
DOPRA TYPE STRING,
TKF2N TYPE STRING,
TKF3N TYPE STRING,
TKF2D TYPE STRING,
TKF3D TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P2RT_ST_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_P2RT_ST_STR-MANDT sy-vline 
WA_P2RT_ST_STR-DCT_PERNR sy-vline 
WA_P2RT_ST_STR-DCT_SEQNR sy-vline 
WA_P2RT_ST_STR-DCT_ROWID sy-vline 
WA_P2RT_ST_STR-CNTR2 sy-vline 
WA_P2RT_ST_STR-BEGDA sy-vline 
WA_P2RT_ST_STR-ENDDA sy-vline 
WA_P2RT_ST_STR-TTKF1 sy-vline 
WA_P2RT_ST_STR-TTKF2 sy-vline 
WA_P2RT_ST_STR-LZZRM sy-vline 
WA_P2RT_ST_STR-STAGE sy-vline 
WA_P2RT_ST_STR-TTFB0 sy-vline 
WA_P2RT_ST_STR-TTFB1 sy-vline 
WA_P2RT_ST_STR-TTFB2 sy-vline 
WA_P2RT_ST_STR-TTFB3 sy-vline 
WA_P2RT_ST_STR-TTFB4 sy-vline 
WA_P2RT_ST_STR-TTFC1 sy-vline 
WA_P2RT_ST_STR-TTFC2 sy-vline 
WA_P2RT_ST_STR-TTFC3 sy-vline 
WA_P2RT_ST_STR-TTFC4 sy-vline 
WA_P2RT_ST_STR-TTFC5 sy-vline 
WA_P2RT_ST_STR-TTFD1 sy-vline 
WA_P2RT_ST_STR-TTFD2 sy-vline 
WA_P2RT_ST_STR-STFRG sy-vline 
WA_P2RT_ST_STR-STBFG sy-vline 
WA_P2RT_ST_STR-STRSO sy-vline 
WA_P2RT_ST_STR-STRS2 sy-vline 
WA_P2RT_ST_STR-USCHR sy-vline 
WA_P2RT_ST_STR-DOPRA sy-vline 
WA_P2RT_ST_STR-TKF2N sy-vline 
WA_P2RT_ST_STR-TKF3N sy-vline 
WA_P2RT_ST_STR-TKF2D sy-vline 
WA_P2RT_ST_STR-TKF3D sy-vline      INTO ld_text SEPARATED BY SPACE.

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