ABAP Select data from SAP table RDGPKREP_P into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RDGPKREP_P
*  INTO TABLE @DATA(IT_RDGPKREP_P2).
*--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_RDGPKREP_P INDEX 1 INTO DATA(WA_RDGPKREP_P2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RDGPKREP_P>-MATNR = 1.
<RDGPKREP_P>-MAKTX = 1.
<RDGPKREP_P>-LWDG = 1.
<RDGPKREP_P>-LWDGN = 1.
<RDGPKREP_P>-PACOD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RDGPKREP_P-PACDD, sy-vline,
  WA_RDGPKREP_P-PACDC, sy-vline,
  WA_RDGPKREP_P-AENNR, sy-vline,
  WA_RDGPKREP_P-AETXT, sy-vline,
  WA_RDGPKREP_P-VALFR, sy-vline,
  WA_RDGPKREP_P-VALTO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RDGPKREP_P 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_RDGPKREP_P 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_RDGPKREP_P INTO WA_RDGPKREP_P.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RDGPKREP_P-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RDGPKREP_P-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AENNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RDGPKREP_P-AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RDGPKREP_P-AENNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RECN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RDGPKREP_P-RECN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RDGPKREP_P-RECN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ACTN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RDGPKREP_P-ACTN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RDGPKREP_P-ACTN.
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_RDGPKREP_P_STR, 
MATNR TYPE STRING,
MAKTX TYPE STRING,
LWDG TYPE STRING,
LWDGN TYPE STRING,
PACOD TYPE STRING,
PACDD TYPE STRING,
PACDC TYPE STRING,
AENNR TYPE STRING,
AETXT TYPE STRING,
VALFR TYPE STRING,
VALTO TYPE STRING,
PERIP TYPE STRING,
PEROP TYPE STRING,
PERSP TYPE STRING,
EERIP TYPE STRING,
EEROP TYPE STRING,
EERSP TYPE STRING,
IPALL TYPE STRING,
AGAUN TYPE STRING,
REGNO TYPE STRING,
AGRNO TYPE STRING,
PAWOS TYPE STRING,
PAWOSD TYPE STRING,
PARKFLG TYPE STRING,
RECN TYPE STRING,
ACTN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RDGPKREP_P_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_RDGPKREP_P_STR-MATNR sy-vline 
WA_RDGPKREP_P_STR-MAKTX sy-vline 
WA_RDGPKREP_P_STR-LWDG sy-vline 
WA_RDGPKREP_P_STR-LWDGN sy-vline 
WA_RDGPKREP_P_STR-PACOD sy-vline 
WA_RDGPKREP_P_STR-PACDD sy-vline 
WA_RDGPKREP_P_STR-PACDC sy-vline 
WA_RDGPKREP_P_STR-AENNR sy-vline 
WA_RDGPKREP_P_STR-AETXT sy-vline 
WA_RDGPKREP_P_STR-VALFR sy-vline 
WA_RDGPKREP_P_STR-VALTO sy-vline 
WA_RDGPKREP_P_STR-PERIP sy-vline 
WA_RDGPKREP_P_STR-PEROP sy-vline 
WA_RDGPKREP_P_STR-PERSP sy-vline 
WA_RDGPKREP_P_STR-EERIP sy-vline 
WA_RDGPKREP_P_STR-EEROP sy-vline 
WA_RDGPKREP_P_STR-EERSP sy-vline 
WA_RDGPKREP_P_STR-IPALL sy-vline 
WA_RDGPKREP_P_STR-AGAUN sy-vline 
WA_RDGPKREP_P_STR-REGNO sy-vline 
WA_RDGPKREP_P_STR-AGRNO sy-vline 
WA_RDGPKREP_P_STR-PAWOS sy-vline 
WA_RDGPKREP_P_STR-PAWOSD sy-vline 
WA_RDGPKREP_P_STR-PARKFLG sy-vline 
WA_RDGPKREP_P_STR-RECN sy-vline 
WA_RDGPKREP_P_STR-ACTN sy-vline      INTO ld_text SEPARATED BY SPACE.

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