ABAP Select data from SAP table RELM_PL_PF_CN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RELM_PL_PF_CN
*  INTO TABLE @DATA(IT_RELM_PL_PF_CN2).
*--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_RELM_PL_PF_CN INDEX 1 INTO DATA(WA_RELM_PL_PF_CN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RELM_PL_PF_CN>-USAGE_CN = 1.
<RELM_PL_PF_CN>-INTRENO = 1.
<RELM_PL_PF_CN>-OBJNR = 1.
<RELM_PL_PF_CN>-BUKRS = 1.
<RELM_PL_PF_CN>-RECNNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RELM_PL_PF_CN-RECNTYPE, sy-vline,
  WA_RELM_PL_PF_CN-RECNBEG, sy-vline,
  WA_RELM_PL_PF_CN-RECNENDABS, sy-vline,
  WA_RELM_PL_PF_CN-RECNTXT, sy-vline,
  WA_RELM_PL_PF_CN-XRECNTYPE, sy-vline,
  WA_RELM_PL_PF_CN-TRANSPOSSFROM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RELM_PL_PF_CN 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_RELM_PL_PF_CN 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_RELM_PL_PF_CN INTO WA_RELM_PL_PF_CN.


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

*Conversion exit REDAT, internal->external for field RECNENDABS
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_RELM_PL_PF_CN-RECNENDABS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RELM_PL_PF_CN-RECNENDABS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit REDAT, internal->external for field TRANSPOSSTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_RELM_PL_PF_CN-TRANSPOSSTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RELM_PL_PF_CN-TRANSPOSSTO.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit REDAT, internal->external for field MEASVALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_RELM_PL_PF_CN-MEASVALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RELM_PL_PF_CN-MEASVALIDTO.
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_RELM_PL_PF_CN_STR, 
USAGE_CN TYPE STRING,
INTRENO TYPE STRING,
OBJNR TYPE STRING,
BUKRS TYPE STRING,
RECNNR TYPE STRING,
RECNTYPE TYPE STRING,
RECNBEG TYPE STRING,
RECNENDABS TYPE STRING,
RECNTXT TYPE STRING,
XRECNTYPE TYPE STRING,
TRANSPOSSFROM TYPE STRING,
TRANSPOSSTO TYPE STRING,
IDENTKEY TYPE STRING,
PARTNER TYPE STRING,
MEAS TYPE STRING,
MEASVALUE TYPE STRING,
MEASUNIT TYPE STRING,
MEASVALIDFROM TYPE STRING,
MEASVALIDTO TYPE STRING,
NEGATIVE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RELM_PL_PF_CN_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_RELM_PL_PF_CN_STR-USAGE_CN sy-vline 
WA_RELM_PL_PF_CN_STR-INTRENO sy-vline 
WA_RELM_PL_PF_CN_STR-OBJNR sy-vline 
WA_RELM_PL_PF_CN_STR-BUKRS sy-vline 
WA_RELM_PL_PF_CN_STR-RECNNR sy-vline 
WA_RELM_PL_PF_CN_STR-RECNTYPE sy-vline 
WA_RELM_PL_PF_CN_STR-RECNBEG sy-vline 
WA_RELM_PL_PF_CN_STR-RECNENDABS sy-vline 
WA_RELM_PL_PF_CN_STR-RECNTXT sy-vline 
WA_RELM_PL_PF_CN_STR-XRECNTYPE sy-vline 
WA_RELM_PL_PF_CN_STR-TRANSPOSSFROM sy-vline 
WA_RELM_PL_PF_CN_STR-TRANSPOSSTO sy-vline 
WA_RELM_PL_PF_CN_STR-IDENTKEY sy-vline 
WA_RELM_PL_PF_CN_STR-PARTNER sy-vline 
WA_RELM_PL_PF_CN_STR-MEAS sy-vline 
WA_RELM_PL_PF_CN_STR-MEASVALUE sy-vline 
WA_RELM_PL_PF_CN_STR-MEASUNIT sy-vline 
WA_RELM_PL_PF_CN_STR-MEASVALIDFROM sy-vline 
WA_RELM_PL_PF_CN_STR-MEASVALIDTO sy-vline 
WA_RELM_PL_PF_CN_STR-NEGATIVE sy-vline      INTO ld_text SEPARATED BY SPACE.

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