ABAP Select data from SAP table RMCLD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RMCLD
*  INTO TABLE @DATA(IT_RMCLD2).
*--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_RMCLD INDEX 1 INTO DATA(WA_RMCLD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RMCLD>-CLASS = 1.
<RMCLD>-KLART = 1.
<RMCLD>-DATASET = 1.
<RMCLD>-SPRAS = 1.
<RMCLD>-NORMN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RMCLD-NORMDAT, sy-vline,
  WA_RMCLD-MATNR, sy-vline,
  WA_RMCLD-MAKTX, sy-vline,
  WA_RMCLD-WRKST, sy-vline,
  WA_RMCLD-MEINS, sy-vline,
  WA_RMCLD-KLBEZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RMCLD 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_RMCLD 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_RMCLD INTO WA_RMCLD.


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

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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RMCLD-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCLD-MEINS.
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_RMCLD_STR, 
CLASS TYPE STRING,
KLART TYPE STRING,
DATASET TYPE STRING,
SPRAS TYPE STRING,
NORMN TYPE STRING,
NORMDAT TYPE STRING,
MATNR TYPE STRING,
MAKTX TYPE STRING,
WRKST TYPE STRING,
MEINS TYPE STRING,
KLBEZ TYPE STRING,
MERKZ TYPE STRING,
DAAPP TYPE STRING,
DAREM TYPE STRING,
DAFRN TYPE STRING,
MTART TYPE STRING,
MTTYP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RMCLD_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_RMCLD_STR-CLASS sy-vline 
WA_RMCLD_STR-KLART sy-vline 
WA_RMCLD_STR-DATASET sy-vline 
WA_RMCLD_STR-SPRAS sy-vline 
WA_RMCLD_STR-NORMN sy-vline 
WA_RMCLD_STR-NORMDAT sy-vline 
WA_RMCLD_STR-MATNR sy-vline 
WA_RMCLD_STR-MAKTX sy-vline 
WA_RMCLD_STR-WRKST sy-vline 
WA_RMCLD_STR-MEINS sy-vline 
WA_RMCLD_STR-KLBEZ sy-vline 
WA_RMCLD_STR-MERKZ sy-vline 
WA_RMCLD_STR-DAAPP sy-vline 
WA_RMCLD_STR-DAREM sy-vline 
WA_RMCLD_STR-DAFRN sy-vline 
WA_RMCLD_STR-MTART sy-vline 
WA_RMCLD_STR-MTTYP sy-vline      INTO ld_text SEPARATED BY SPACE.

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