ABAP Select data from SAP table RMCV1 into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RMCV1 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 RMCV1. 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 RMCV1 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_RMCV1 TYPE STANDARD TABLE OF RMCV1,
      WA_RMCV1 TYPE RMCV1,
      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: <RMCV1> TYPE RMCV1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RMCV1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RMCV1
  INTO TABLE IT_RMCV1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RMCV1
*  INTO TABLE @DATA(IT_RMCV12).
*--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_RMCV1 INDEX 1 INTO DATA(WA_RMCV12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RMCV1 ASSIGNING <RMCV1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RMCV1>-SPMONV = 1.
<RMCV1>-SPMONB = 1.
<RMCV1>-SPTAGV = 1.
<RMCV1>-SPTAGB = 1.
<RMCV1>-SPWOCV = 1.

ENDLOOP.

LOOP AT IT_RMCV1 INTO WA_RMCV1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RMCV1-SPWOCB, sy-vline,
  WA_RMCV1-SPBUPV, sy-vline,
  WA_RMCV1-SPBUPB, sy-vline,
  WA_RMCV1-KUNNRV, sy-vline,
  WA_RMCV1-KUNNRB, sy-vline,
  WA_RMCV1-MATNRV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RMCV1 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_RMCV1 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_RMCV1 INTO WA_RMCV1.


*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 PERI, internal->external for field SPMONV
CALL FUNCTION 'CONVERSION_EXIT_PERI_OUTPUT'
  EXPORTING
    input =                      WA_RMCV1-SPMONV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCV1-SPMONV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI, internal->external for field SPMONB
CALL FUNCTION 'CONVERSION_EXIT_PERI_OUTPUT'
  EXPORTING
    input =                      WA_RMCV1-SPMONB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCV1-SPMONB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI, internal->external for field SPWOCV
CALL FUNCTION 'CONVERSION_EXIT_PERI_OUTPUT'
  EXPORTING
    input =                      WA_RMCV1-SPWOCV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCV1-SPWOCV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI, internal->external for field SPWOCB
CALL FUNCTION 'CONVERSION_EXIT_PERI_OUTPUT'
  EXPORTING
    input =                      WA_RMCV1-SPWOCB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCV1-SPWOCB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI, internal->external for field SPBUPV
CALL FUNCTION 'CONVERSION_EXIT_PERI_OUTPUT'
  EXPORTING
    input =                      WA_RMCV1-SPBUPV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCV1-SPBUPV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI, internal->external for field SPBUPB
CALL FUNCTION 'CONVERSION_EXIT_PERI_OUTPUT'
  EXPORTING
    input =                      WA_RMCV1-SPBUPB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCV1-SPBUPB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNRV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RMCV1-KUNNRV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCV1-KUNNRV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNRB
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RMCV1-KUNNRB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCV1-KUNNRB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNRV
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RMCV1-MATNRV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCV1-MATNRV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNRB
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RMCV1-MATNRB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCV1-MATNRB.
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_RMCV1_STR, 
SPMONV TYPE STRING,
SPMONB TYPE STRING,
SPTAGV TYPE STRING,
SPTAGB TYPE STRING,
SPWOCV TYPE STRING,
SPWOCB TYPE STRING,
SPBUPV TYPE STRING,
SPBUPB TYPE STRING,
KUNNRV TYPE STRING,
KUNNRB TYPE STRING,
MATNRV TYPE STRING,
MATNRB TYPE STRING,
VKORGV TYPE STRING,
VKORGB TYPE STRING,
VTWEGV TYPE STRING,
VTWEGB TYPE STRING,
SPARTV TYPE STRING,
SPARTB TYPE STRING,
ZEITR TYPE STRING,
DATUMV TYPE STRING,
DATUMB TYPE STRING,
MCGRT TYPE STRING,
SELVS TYPE STRING,
SETXT TYPE STRING,
UNAME TYPE STRING,
DATUM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RMCV1_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_RMCV1_STR-SPMONV sy-vline 
WA_RMCV1_STR-SPMONB sy-vline 
WA_RMCV1_STR-SPTAGV sy-vline 
WA_RMCV1_STR-SPTAGB sy-vline 
WA_RMCV1_STR-SPWOCV sy-vline 
WA_RMCV1_STR-SPWOCB sy-vline 
WA_RMCV1_STR-SPBUPV sy-vline 
WA_RMCV1_STR-SPBUPB sy-vline 
WA_RMCV1_STR-KUNNRV sy-vline 
WA_RMCV1_STR-KUNNRB sy-vline 
WA_RMCV1_STR-MATNRV sy-vline 
WA_RMCV1_STR-MATNRB sy-vline 
WA_RMCV1_STR-VKORGV sy-vline 
WA_RMCV1_STR-VKORGB sy-vline 
WA_RMCV1_STR-VTWEGV sy-vline 
WA_RMCV1_STR-VTWEGB sy-vline 
WA_RMCV1_STR-SPARTV sy-vline 
WA_RMCV1_STR-SPARTB sy-vline 
WA_RMCV1_STR-ZEITR sy-vline 
WA_RMCV1_STR-DATUMV sy-vline 
WA_RMCV1_STR-DATUMB sy-vline 
WA_RMCV1_STR-MCGRT sy-vline 
WA_RMCV1_STR-SELVS sy-vline 
WA_RMCV1_STR-SETXT sy-vline 
WA_RMCV1_STR-UNAME sy-vline 
WA_RMCV1_STR-DATUM sy-vline      INTO ld_text SEPARATED BY SPACE.

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