ABAP Select data from SAP table P2RC_ST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P2RC_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 P2RC_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 P2RC_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_P2RC_ST TYPE STANDARD TABLE OF P2RC_ST,
      WA_P2RC_ST TYPE P2RC_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: <P2RC_ST> TYPE P2RC_ST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P2RC_ST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P2RC_ST
  INTO TABLE IT_P2RC_ST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P2RC_ST
*  INTO TABLE @DATA(IT_P2RC_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_P2RC_ST INDEX 1 INTO DATA(WA_P2RC_ST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P2RC_ST ASSIGNING <P2RC_ST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P2RC_ST>-MANDT = 1.
<P2RC_ST>-DCT_PERNR = 1.
<P2RC_ST>-DCT_SEQNR = 1.
<P2RC_ST>-DCT_ROWID = 1.
<P2RC_ST>-CNTR2 = 1.

ENDLOOP.

LOOP AT IT_P2RC_ST INTO WA_P2RC_ST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P2RC_ST-BEGDA, sy-vline,
  WA_P2RC_ST-ENDDA, sy-vline,
  WA_P2RC_ST-KANTO, sy-vline,
  WA_P2RC_ST-GEMND, sy-vline,
  WA_P2RC_ST-QSTPF, sy-vline,
  WA_P2RC_ST-QSTAB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P2RC_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_P2RC_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_P2RC_ST INTO WA_P2RC_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_P2RC_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,
KANTO TYPE STRING,
GEMND TYPE STRING,
QSTPF TYPE STRING,
QSTAB TYPE STRING,
QSPRO TYPE STRING,
QSBTR TYPE STRING,
INAKTIV TYPE STRING,
QSPROEF TYPE STRING,
AKANT TYPE STRING,
MA3GB TYPE STRING,
MAB3G TYPE STRING,
NEBEN TYPE STRING,
ANDBE TYPE STRING,
CONCU TYPE STRING,
PRSCA TYPE STRING,
QSTABEF TYPE STRING,
DIF_MUNIDLIVING TYPE STRING,
ANNUI TYPE STRING,
BEVMOD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P2RC_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_P2RC_ST_STR-MANDT sy-vline 
WA_P2RC_ST_STR-DCT_PERNR sy-vline 
WA_P2RC_ST_STR-DCT_SEQNR sy-vline 
WA_P2RC_ST_STR-DCT_ROWID sy-vline 
WA_P2RC_ST_STR-CNTR2 sy-vline 
WA_P2RC_ST_STR-BEGDA sy-vline 
WA_P2RC_ST_STR-ENDDA sy-vline 
WA_P2RC_ST_STR-KANTO sy-vline 
WA_P2RC_ST_STR-GEMND sy-vline 
WA_P2RC_ST_STR-QSTPF sy-vline 
WA_P2RC_ST_STR-QSTAB sy-vline 
WA_P2RC_ST_STR-QSPRO sy-vline 
WA_P2RC_ST_STR-QSBTR sy-vline 
WA_P2RC_ST_STR-INAKTIV sy-vline 
WA_P2RC_ST_STR-QSPROEF sy-vline 
WA_P2RC_ST_STR-AKANT sy-vline 
WA_P2RC_ST_STR-MA3GB sy-vline 
WA_P2RC_ST_STR-MAB3G sy-vline 
WA_P2RC_ST_STR-NEBEN sy-vline 
WA_P2RC_ST_STR-ANDBE sy-vline 
WA_P2RC_ST_STR-CONCU sy-vline 
WA_P2RC_ST_STR-PRSCA sy-vline 
WA_P2RC_ST_STR-QSTABEF sy-vline 
WA_P2RC_ST_STR-DIF_MUNIDLIVING sy-vline 
WA_P2RC_ST_STR-ANNUI sy-vline 
WA_P2RC_ST_STR-BEVMOD sy-vline      INTO ld_text SEPARATED BY SPACE.

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