ABAP Select data from SAP table RCE_PRST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCE_PRST
*  INTO TABLE @DATA(IT_RCE_PRST2).
*--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_RCE_PRST INDEX 1 INTO DATA(WA_RCE_PRST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCE_PRST>-MATNR = 1.
<RCE_PRST>-MAKTX = 1.
<RCE_PRST>-VBELN = 1.
<RCE_PRST>-POSNR = 1.
<RCE_PRST>-TYPNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCE_PRST-WERKS, sy-vline,
  WA_RCE_PRST-WTEXT, sy-vline,
  WA_RCE_PRST-WKSEL, sy-vline,
  WA_RCE_PRST-WKWRK, sy-vline,
  WA_RCE_PRST-WKTXT, sy-vline,
  WA_RCE_PRST-KZSEL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCE_PRST 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_RCE_PRST 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_RCE_PRST INTO WA_RCE_PRST.


*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_RCE_PRST-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCE_PRST-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RCE_PRST-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCE_PRST-MEINS.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RCE_PRST-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCE_PRST-SPRAS.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ABPSP, internal->external for field PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_RCE_PRST-PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCE_PRST-PSPNR.
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_RCE_PRST_STR, 
MATNR TYPE STRING,
MAKTX TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
TYPNR TYPE STRING,
WERKS TYPE STRING,
WTEXT TYPE STRING,
WKSEL TYPE STRING,
WKWRK TYPE STRING,
WKTXT TYPE STRING,
KZSEL TYPE STRING,
ZEILE TYPE STRING,
MEINS TYPE STRING,
MENGE TYPE STRING,
DATUV TYPE STRING,
DMSTU TYPE STRING,
DSTRU TYPE STRING,
DPSEU TYPE STRING,
UAKTK TYPE STRING,
UKOMP TYPE STRING,
UNBOB TYPE STRING,
UBEZW TYPE STRING,
UKNOT TYPE STRING,
UCMPF TYPE STRING,
KOXXX TYPE STRING,
KOMAT TYPE STRING,
KOKDA TYPE STRING,
KOFAU TYPE STRING,
CBAUG TYPE STRING,
ICON TYPE STRING,
ICON1 TYPE STRING,
IMBEW TYPE STRING,
RSBOM TYPE STRING,
RSPLN TYPE STRING,
COSEL TYPE STRING,
OTEXT TYPE STRING,
IMATNR TYPE STRING,
IMAKTX TYPE STRING,
IDATUV TYPE STRING,
IMENGE TYPE STRING,
ICONA TYPE STRING,
IDNRK TYPE STRING,
AENNR TYPE STRING,
SMATNR TYPE STRING,
SEQUNR TYPE STRING,
SKLART TYPE STRING,
SCLASS TYPE STRING,
WDATU TYPE STRING,
PFUEB TYPE STRING,
CTRUE TYPE STRING,
APPID TYPE STRING,
EMAKTX TYPE STRING,
SPRAS TYPE STRING,
EMATNR TYPE STRING,
VMATNR TYPE STRING,
EMTART TYPE STRING,
PSPNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCE_PRST_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_RCE_PRST_STR-MATNR sy-vline 
WA_RCE_PRST_STR-MAKTX sy-vline 
WA_RCE_PRST_STR-VBELN sy-vline 
WA_RCE_PRST_STR-POSNR sy-vline 
WA_RCE_PRST_STR-TYPNR sy-vline 
WA_RCE_PRST_STR-WERKS sy-vline 
WA_RCE_PRST_STR-WTEXT sy-vline 
WA_RCE_PRST_STR-WKSEL sy-vline 
WA_RCE_PRST_STR-WKWRK sy-vline 
WA_RCE_PRST_STR-WKTXT sy-vline 
WA_RCE_PRST_STR-KZSEL sy-vline 
WA_RCE_PRST_STR-ZEILE sy-vline 
WA_RCE_PRST_STR-MEINS sy-vline 
WA_RCE_PRST_STR-MENGE sy-vline 
WA_RCE_PRST_STR-DATUV sy-vline 
WA_RCE_PRST_STR-DMSTU sy-vline 
WA_RCE_PRST_STR-DSTRU sy-vline 
WA_RCE_PRST_STR-DPSEU sy-vline 
WA_RCE_PRST_STR-UAKTK sy-vline 
WA_RCE_PRST_STR-UKOMP sy-vline 
WA_RCE_PRST_STR-UNBOB sy-vline 
WA_RCE_PRST_STR-UBEZW sy-vline 
WA_RCE_PRST_STR-UKNOT sy-vline 
WA_RCE_PRST_STR-UCMPF sy-vline 
WA_RCE_PRST_STR-KOXXX sy-vline 
WA_RCE_PRST_STR-KOMAT sy-vline 
WA_RCE_PRST_STR-KOKDA sy-vline 
WA_RCE_PRST_STR-KOFAU sy-vline 
WA_RCE_PRST_STR-CBAUG sy-vline 
WA_RCE_PRST_STR-ICON sy-vline 
WA_RCE_PRST_STR-ICON1 sy-vline 
WA_RCE_PRST_STR-IMBEW sy-vline 
WA_RCE_PRST_STR-RSBOM sy-vline 
WA_RCE_PRST_STR-RSPLN sy-vline 
WA_RCE_PRST_STR-COSEL sy-vline 
WA_RCE_PRST_STR-OTEXT sy-vline 
WA_RCE_PRST_STR-IMATNR sy-vline 
WA_RCE_PRST_STR-IMAKTX sy-vline 
WA_RCE_PRST_STR-IDATUV sy-vline 
WA_RCE_PRST_STR-IMENGE sy-vline 
WA_RCE_PRST_STR-ICONA sy-vline 
WA_RCE_PRST_STR-IDNRK sy-vline 
WA_RCE_PRST_STR-AENNR sy-vline 
WA_RCE_PRST_STR-SMATNR sy-vline 
WA_RCE_PRST_STR-SEQUNR sy-vline 
WA_RCE_PRST_STR-SKLART sy-vline 
WA_RCE_PRST_STR-SCLASS sy-vline 
WA_RCE_PRST_STR-WDATU sy-vline 
WA_RCE_PRST_STR-PFUEB sy-vline 
WA_RCE_PRST_STR-CTRUE sy-vline 
WA_RCE_PRST_STR-APPID sy-vline 
WA_RCE_PRST_STR-EMAKTX sy-vline 
WA_RCE_PRST_STR-SPRAS sy-vline 
WA_RCE_PRST_STR-EMATNR sy-vline 
WA_RCE_PRST_STR-VMATNR sy-vline 
WA_RCE_PRST_STR-EMTART sy-vline 
WA_RCE_PRST_STR-PSPNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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