ABAP Select data from SAP table P2RR_CAW into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P2RR_CAW 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 P2RR_CAW. 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 P2RR_CAW 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_P2RR_CAW TYPE STANDARD TABLE OF P2RR_CAW,
      WA_P2RR_CAW TYPE P2RR_CAW,
      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: <P2RR_CAW> TYPE P2RR_CAW.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P2RR_CAW.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P2RR_CAW
  INTO TABLE IT_P2RR_CAW.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P2RR_CAW
*  INTO TABLE @DATA(IT_P2RR_CAW2).
*--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_P2RR_CAW INDEX 1 INTO DATA(WA_P2RR_CAW2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P2RR_CAW ASSIGNING <P2RR_CAW>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P2RR_CAW>-MANDT = 1.
<P2RR_CAW>-DCT_PERNR = 1.
<P2RR_CAW>-DCT_SEQNR = 1.
<P2RR_CAW>-DCT_ROWID = 1.
<P2RR_CAW>-CNTR1 = 1.

ENDLOOP.

LOOP AT IT_P2RR_CAW INTO WA_P2RR_CAW.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P2RR_CAW-LGART, sy-vline,
  WA_P2RR_CAW-PABRJ, sy-vline,
  WA_P2RR_CAW-PABRP, sy-vline,
  WA_P2RR_CAW-BETPE, sy-vline,
  WA_P2RR_CAW-ANZHL, sy-vline,
  WA_P2RR_CAW-BETRG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P2RR_CAW 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_P2RR_CAW 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_P2RR_CAW INTO WA_P2RR_CAW.


*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.

*Conversion exit GJAHR, internal->external for field PABRJ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_P2RR_CAW-PABRJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P2RR_CAW-PABRJ.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_P2RR_CAW_STR, 
MANDT TYPE STRING,
DCT_PERNR TYPE STRING,
DCT_SEQNR TYPE STRING,
DCT_ROWID TYPE STRING,
CNTR1 TYPE STRING,
LGART TYPE STRING,
PABRJ TYPE STRING,
PABRP TYPE STRING,
BETPE TYPE STRING,
ANZHL TYPE STRING,
BETRG TYPE STRING,
ANSGA TYPE STRING,
AGSGA TYPE STRING,
EELIM TYPE STRING,
EYLIM TYPE STRING,
AMOUT TYPE STRING,
WAGLV TYPE STRING,
WAGLV1 TYPE STRING,
WAGLV2 TYPE STRING,
WAGLV3 TYPE STRING,
WAGLV4 TYPE STRING,
WAGLV5 TYPE STRING,
WAGLV6 TYPE STRING,
EECON TYPE STRING,
ERCON TYPE STRING,
ERREF_NO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P2RR_CAW_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_P2RR_CAW_STR-MANDT sy-vline 
WA_P2RR_CAW_STR-DCT_PERNR sy-vline 
WA_P2RR_CAW_STR-DCT_SEQNR sy-vline 
WA_P2RR_CAW_STR-DCT_ROWID sy-vline 
WA_P2RR_CAW_STR-CNTR1 sy-vline 
WA_P2RR_CAW_STR-LGART sy-vline 
WA_P2RR_CAW_STR-PABRJ sy-vline 
WA_P2RR_CAW_STR-PABRP sy-vline 
WA_P2RR_CAW_STR-BETPE sy-vline 
WA_P2RR_CAW_STR-ANZHL sy-vline 
WA_P2RR_CAW_STR-BETRG sy-vline 
WA_P2RR_CAW_STR-ANSGA sy-vline 
WA_P2RR_CAW_STR-AGSGA sy-vline 
WA_P2RR_CAW_STR-EELIM sy-vline 
WA_P2RR_CAW_STR-EYLIM sy-vline 
WA_P2RR_CAW_STR-AMOUT sy-vline 
WA_P2RR_CAW_STR-WAGLV sy-vline 
WA_P2RR_CAW_STR-WAGLV1 sy-vline 
WA_P2RR_CAW_STR-WAGLV2 sy-vline 
WA_P2RR_CAW_STR-WAGLV3 sy-vline 
WA_P2RR_CAW_STR-WAGLV4 sy-vline 
WA_P2RR_CAW_STR-WAGLV5 sy-vline 
WA_P2RR_CAW_STR-WAGLV6 sy-vline 
WA_P2RR_CAW_STR-EECON sy-vline 
WA_P2RR_CAW_STR-ERCON sy-vline 
WA_P2RR_CAW_STR-ERREF_NO sy-vline      INTO ld_text SEPARATED BY SPACE.

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