ABAP Select data from SAP table RMCS3 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RMCS3 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 RMCS3. 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 RMCS3 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_RMCS3 TYPE STANDARD TABLE OF RMCS3,
      WA_RMCS3 TYPE RMCS3,
      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: <RMCS3> TYPE RMCS3.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RMCS3.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RMCS3
  INTO TABLE IT_RMCS3.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RMCS3
*  INTO TABLE @DATA(IT_RMCS32).
*--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_RMCS3 INDEX 1 INTO DATA(WA_RMCS32).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RMCS3 ASSIGNING <RMCS3>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RMCS3>-FCATL = 1.
<RMCS3>-FCART = 1.
<RMCS3>-FCBEZ = 1.
<RMCS3>-SUHIE = 1.
<RMCS3>-FDBEZ = 1.

ENDLOOP.

LOOP AT IT_RMCS3 INTO WA_RMCS3.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RMCS3-KENNZAHL, sy-vline,
  WA_RMCS3-MERKMAL, sy-vline,
  WA_RMCS3-TABTXT, sy-vline,
  WA_RMCS3-XMERK, sy-vline,
  WA_RMCS3-XKENN, sy-vline,
  WA_RMCS3-XDATU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RMCS3 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_RMCS3 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_RMCS3 INTO WA_RMCS3.


*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 STAFO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RMCS3-STAFO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCS3-STAFO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RMCS3-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCS3-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN_CAS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RMCS3-VBELN_CAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCS3-VBELN_CAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN_VA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RMCS3-VBELN_VA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCS3-VBELN_VA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN_VL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RMCS3-VBELN_VL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCS3-VBELN_VL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN_VF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RMCS3-VBELN_VF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCS3-VBELN_VF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RMCS3-MBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCS3-MBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field MJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RMCS3-MJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCS3-MJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RMCS3-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCS3-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RMCS3-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCS3-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BSTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RMCS3-BSTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCS3-BSTNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field UBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RMCS3-UBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCS3-UBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field UBJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RMCS3-UBJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCS3-UBJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TKNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RMCS3-TKNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCS3-TKNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field IBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RMCS3-IBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCS3-IBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RBELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RMCS3-RBELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCS3-RBELNR.
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_RMCS3_STR, 
FCATL TYPE STRING,
FCART TYPE STRING,
FCBEZ TYPE STRING,
SUHIE TYPE STRING,
FDBEZ TYPE STRING,
KENNZAHL TYPE STRING,
MERKMAL TYPE STRING,
TABTXT TYPE STRING,
XMERK TYPE STRING,
XKENN TYPE STRING,
XDATU TYPE STRING,
TBTYP TYPE STRING,
PLNAM TYPE STRING,
KAEND TYPE STRING,
STGEN TYPE STRING,
MUSTR TYPE STRING,
SMAND TYPE STRING,
GSTRU TYPE STRING,
LFNR2 TYPE STRING,
STFNA TYPE STRING,
QUTAB TYPE STRING,
QUFNA TYPE STRING,
KINCL TYPE STRING,
SFEIN TYPE STRING,
SEFNA TYPE STRING,
SQTAB TYPE STRING,
SQFNA TYPE STRING,
MANDT TYPE STRING,
MCINF TYPE STRING,
STABL TYPE STRING,
DDICT TYPE STRING,
SPERI TYPE STRING,
MCAPP TYPE STRING,
MCITY TYPE STRING,
GSTXT TYPE STRING,
ISTXT TYPE STRING,
ROLLNAME TYPE STRING,
DOMNAME TYPE STRING,
MCIVO TYPE STRING,
SPZIS TYPE STRING,
GESAMTKZ TYPE STRING,
PERIV TYPE STRING,
QFEIN TYPE STRING,
MCATX TYPE STRING,
KATART TYPE STRING,
STAFO TYPE STRING,
BEZEI TYPE STRING,
MCISGS TYPE STRING,
MCISSS TYPE STRING,
VBELN TYPE STRING,
VBELN_CAS TYPE STRING,
VBELN_VA TYPE STRING,
VBELN_VL TYPE STRING,
VBELN_VF TYPE STRING,
MBLNR TYPE STRING,
MJAHR TYPE STRING,
BELNR TYPE STRING,
BUKRS TYPE STRING,
GJAHR TYPE STRING,
BSTNR TYPE STRING,
UBLNR TYPE STRING,
UBJAHR TYPE STRING,
TABNBEW TYPE STRING,
TABNBST TYPE STRING,
BSTWRT TYPE STRING,
ZUGFLD TYPE STRING,
ABGFLD TYPE STRING,
QEZUGFLD TYPE STRING,
QEABGFLD TYPE STRING,
SISTX TYPE STRING,
QEBEZ TYPE STRING,
QUEBZZ TYPE STRING,
QUEBZA TYPE STRING,
ISBSTBEZ TYPE STRING,
ISBEWBEZ TYPE STRING,
FIXKZ TYPE STRING,
PLREL TYPE STRING,
MITPLAN TYPE STRING,
TKNUM TYPE STRING,
IBLNR TYPE STRING,
RBELNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RMCS3_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_RMCS3_STR-FCATL sy-vline 
WA_RMCS3_STR-FCART sy-vline 
WA_RMCS3_STR-FCBEZ sy-vline 
WA_RMCS3_STR-SUHIE sy-vline 
WA_RMCS3_STR-FDBEZ sy-vline 
WA_RMCS3_STR-KENNZAHL sy-vline 
WA_RMCS3_STR-MERKMAL sy-vline 
WA_RMCS3_STR-TABTXT sy-vline 
WA_RMCS3_STR-XMERK sy-vline 
WA_RMCS3_STR-XKENN sy-vline 
WA_RMCS3_STR-XDATU sy-vline 
WA_RMCS3_STR-TBTYP sy-vline 
WA_RMCS3_STR-PLNAM sy-vline 
WA_RMCS3_STR-KAEND sy-vline 
WA_RMCS3_STR-STGEN sy-vline 
WA_RMCS3_STR-MUSTR sy-vline 
WA_RMCS3_STR-SMAND sy-vline 
WA_RMCS3_STR-GSTRU sy-vline 
WA_RMCS3_STR-LFNR2 sy-vline 
WA_RMCS3_STR-STFNA sy-vline 
WA_RMCS3_STR-QUTAB sy-vline 
WA_RMCS3_STR-QUFNA sy-vline 
WA_RMCS3_STR-KINCL sy-vline 
WA_RMCS3_STR-SFEIN sy-vline 
WA_RMCS3_STR-SEFNA sy-vline 
WA_RMCS3_STR-SQTAB sy-vline 
WA_RMCS3_STR-SQFNA sy-vline 
WA_RMCS3_STR-MANDT sy-vline 
WA_RMCS3_STR-MCINF sy-vline 
WA_RMCS3_STR-STABL sy-vline 
WA_RMCS3_STR-DDICT sy-vline 
WA_RMCS3_STR-SPERI sy-vline 
WA_RMCS3_STR-MCAPP sy-vline 
WA_RMCS3_STR-MCITY sy-vline 
WA_RMCS3_STR-GSTXT sy-vline 
WA_RMCS3_STR-ISTXT sy-vline 
WA_RMCS3_STR-ROLLNAME sy-vline 
WA_RMCS3_STR-DOMNAME sy-vline 
WA_RMCS3_STR-MCIVO sy-vline 
WA_RMCS3_STR-SPZIS sy-vline 
WA_RMCS3_STR-GESAMTKZ sy-vline 
WA_RMCS3_STR-PERIV sy-vline 
WA_RMCS3_STR-QFEIN sy-vline 
WA_RMCS3_STR-MCATX sy-vline 
WA_RMCS3_STR-KATART sy-vline 
WA_RMCS3_STR-STAFO sy-vline 
WA_RMCS3_STR-BEZEI sy-vline 
WA_RMCS3_STR-MCISGS sy-vline 
WA_RMCS3_STR-MCISSS sy-vline 
WA_RMCS3_STR-VBELN sy-vline 
WA_RMCS3_STR-VBELN_CAS sy-vline 
WA_RMCS3_STR-VBELN_VA sy-vline 
WA_RMCS3_STR-VBELN_VL sy-vline 
WA_RMCS3_STR-VBELN_VF sy-vline 
WA_RMCS3_STR-MBLNR sy-vline 
WA_RMCS3_STR-MJAHR sy-vline 
WA_RMCS3_STR-BELNR sy-vline 
WA_RMCS3_STR-BUKRS sy-vline 
WA_RMCS3_STR-GJAHR sy-vline 
WA_RMCS3_STR-BSTNR sy-vline 
WA_RMCS3_STR-UBLNR sy-vline 
WA_RMCS3_STR-UBJAHR sy-vline 
WA_RMCS3_STR-TABNBEW sy-vline 
WA_RMCS3_STR-TABNBST sy-vline 
WA_RMCS3_STR-BSTWRT sy-vline 
WA_RMCS3_STR-ZUGFLD sy-vline 
WA_RMCS3_STR-ABGFLD sy-vline 
WA_RMCS3_STR-QEZUGFLD sy-vline 
WA_RMCS3_STR-QEABGFLD sy-vline 
WA_RMCS3_STR-SISTX sy-vline 
WA_RMCS3_STR-QEBEZ sy-vline 
WA_RMCS3_STR-QUEBZZ sy-vline 
WA_RMCS3_STR-QUEBZA sy-vline 
WA_RMCS3_STR-ISBSTBEZ sy-vline 
WA_RMCS3_STR-ISBEWBEZ sy-vline 
WA_RMCS3_STR-FIXKZ sy-vline 
WA_RMCS3_STR-PLREL sy-vline 
WA_RMCS3_STR-MITPLAN sy-vline 
WA_RMCS3_STR-TKNUM sy-vline 
WA_RMCS3_STR-IBLNR sy-vline 
WA_RMCS3_STR-RBELNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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