ABAP Select data from SAP table P2RU_TCRT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P2RU_TCRT 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 P2RU_TCRT. 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 P2RU_TCRT 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_P2RU_TCRT TYPE STANDARD TABLE OF P2RU_TCRT,
      WA_P2RU_TCRT TYPE P2RU_TCRT,
      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: <P2RU_TCRT> TYPE P2RU_TCRT.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P2RU_TCRT.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P2RU_TCRT
  INTO TABLE IT_P2RU_TCRT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P2RU_TCRT
*  INTO TABLE @DATA(IT_P2RU_TCRT2).
*--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_P2RU_TCRT INDEX 1 INTO DATA(WA_P2RU_TCRT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P2RU_TCRT ASSIGNING <P2RU_TCRT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P2RU_TCRT>-MANDT = 1.
<P2RU_TCRT>-DCT_PERNR = 1.
<P2RU_TCRT>-DCT_SEQNR = 1.
<P2RU_TCRT>-DCT_ROWID = 1.
<P2RU_TCRT>-TXCMP = 1.

ENDLOOP.

LOOP AT IT_P2RU_TCRT INTO WA_P2RU_TCRT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P2RU_TCRT-TAXAU, sy-vline,
  WA_P2RU_TCRT-LGART, sy-vline,
  WA_P2RU_TCRT-CTYPE, sy-vline,
  WA_P2RU_TCRT-BETRG, sy-vline,
  WA_P2RU_TCRT-CUMNO, sy-vline,
  WA_P2RU_TCRT-CUMYR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P2RU_TCRT 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_P2RU_TCRT 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_P2RU_TCRT INTO WA_P2RU_TCRT.


*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 CUMYR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_P2RU_TCRT-CUMYR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P2RU_TCRT-CUMYR.
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_P2RU_TCRT_STR, 
MANDT TYPE STRING,
DCT_PERNR TYPE STRING,
DCT_SEQNR TYPE STRING,
DCT_ROWID TYPE STRING,
TXCMP TYPE STRING,
TAXAU TYPE STRING,
LGART TYPE STRING,
CTYPE TYPE STRING,
BETRG TYPE STRING,
CUMNO TYPE STRING,
CUMYR TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P2RU_TCRT_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_P2RU_TCRT_STR-MANDT sy-vline 
WA_P2RU_TCRT_STR-DCT_PERNR sy-vline 
WA_P2RU_TCRT_STR-DCT_SEQNR sy-vline 
WA_P2RU_TCRT_STR-DCT_ROWID sy-vline 
WA_P2RU_TCRT_STR-TXCMP sy-vline 
WA_P2RU_TCRT_STR-TAXAU sy-vline 
WA_P2RU_TCRT_STR-LGART sy-vline 
WA_P2RU_TCRT_STR-CTYPE sy-vline 
WA_P2RU_TCRT_STR-BETRG sy-vline 
WA_P2RU_TCRT_STR-CUMNO sy-vline 
WA_P2RU_TCRT_STR-CUMYR sy-vline 
WA_P2RU_TCRT_STR-BEGDA sy-vline 
WA_P2RU_TCRT_STR-ENDDA sy-vline      INTO ld_text SEPARATED BY SPACE.

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