ABAP Select data from SAP table RMCS4 into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP RMCS4 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 RMCS4. 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 RMCS4 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_RMCS4 TYPE STANDARD TABLE OF RMCS4,
      WA_RMCS4 TYPE RMCS4,
      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: <RMCS4> TYPE RMCS4.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RMCS4.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RMCS4
  INTO TABLE IT_RMCS4.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RMCS4
*  INTO TABLE @DATA(IT_RMCS42).
*--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_RMCS4 INDEX 1 INTO DATA(WA_RMCS42).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RMCS4 ASSIGNING <RMCS4>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RMCS4>-MCAPP = 1.
<RMCS4>-MCINF = 1.
<RMCS4>-MCANA = 1.
<RMCS4>-GSTRU = 1.
<RMCS4>-MCATX = 1.

ENDLOOP.

LOOP AT IT_RMCS4 INTO WA_RMCS4.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RMCS4-MCANATXT, sy-vline,
  WA_RMCS4-ISTXT, sy-vline,
  WA_RMCS4-UNAME, sy-vline,
  WA_RMCS4-VARIANT, sy-vline,
  WA_RMCS4-MCINFQ, sy-vline,
  WA_RMCS4-SZENTXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RMCS4 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_RMCS4 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_RMCS4 INTO WA_RMCS4.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_RMCS4_STR, 
MCAPP TYPE STRING,
MCINF TYPE STRING,
MCANA TYPE STRING,
GSTRU TYPE STRING,
MCATX TYPE STRING,
MCANATXT TYPE STRING,
ISTXT TYPE STRING,
UNAME TYPE STRING,
VARIANT TYPE STRING,
MCINFQ TYPE STRING,
SZENTXT TYPE STRING,
MC_CM_QDU TYPE STRING,
MC_CM_QDD TYPE STRING,
MC_CM_USEX TYPE STRING,
MC_CM_OUP TYPE STRING,
MC_CM_VSD TYPE STRING,
MC_CM_NOD TYPE STRING,
MC_CM_IDD TYPE STRING,
MC_CM_CID TYPE STRING,
MC_CM_CPC TYPE STRING,
MC_CM_INI TYPE STRING,
MCINFZ TYPE STRING,
MC_CM_DVLE TYPE STRING,
MCSRUMERB1 TYPE STRING,
MCSRUMERB2 TYPE STRING,
MCSRUMERB3 TYPE STRING,
CMVRSIOQ TYPE STRING,
CMVRSIOZ TYPE STRING,
ARVRSIO TYPE STRING,
CMFILEPATH TYPE STRING,
CM_ED_FLAG TYPE STRING,
MC_CM_IDXF TYPE STRING,
MC_CM_DCTB TYPE STRING,
MC_CM_PSIZE TYPE STRING,
MC_CM_ENQT TYPE STRING,
MC_CM_SSEL TYPE STRING,
MC_CM_NOINIT TYPE STRING,
MC_CM_PARAL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RMCS4_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_RMCS4_STR-MCAPP sy-vline 
WA_RMCS4_STR-MCINF sy-vline 
WA_RMCS4_STR-MCANA sy-vline 
WA_RMCS4_STR-GSTRU sy-vline 
WA_RMCS4_STR-MCATX sy-vline 
WA_RMCS4_STR-MCANATXT sy-vline 
WA_RMCS4_STR-ISTXT sy-vline 
WA_RMCS4_STR-UNAME sy-vline 
WA_RMCS4_STR-VARIANT sy-vline 
WA_RMCS4_STR-MCINFQ sy-vline 
WA_RMCS4_STR-SZENTXT sy-vline 
WA_RMCS4_STR-MC_CM_QDU sy-vline 
WA_RMCS4_STR-MC_CM_QDD sy-vline 
WA_RMCS4_STR-MC_CM_USEX sy-vline 
WA_RMCS4_STR-MC_CM_OUP sy-vline 
WA_RMCS4_STR-MC_CM_VSD sy-vline 
WA_RMCS4_STR-MC_CM_NOD sy-vline 
WA_RMCS4_STR-MC_CM_IDD sy-vline 
WA_RMCS4_STR-MC_CM_CID sy-vline 
WA_RMCS4_STR-MC_CM_CPC sy-vline 
WA_RMCS4_STR-MC_CM_INI sy-vline 
WA_RMCS4_STR-MCINFZ sy-vline 
WA_RMCS4_STR-MC_CM_DVLE sy-vline 
WA_RMCS4_STR-MCSRUMERB1 sy-vline 
WA_RMCS4_STR-MCSRUMERB2 sy-vline 
WA_RMCS4_STR-MCSRUMERB3 sy-vline 
WA_RMCS4_STR-CMVRSIOQ sy-vline 
WA_RMCS4_STR-CMVRSIOZ sy-vline 
WA_RMCS4_STR-ARVRSIO sy-vline 
WA_RMCS4_STR-CMFILEPATH sy-vline 
WA_RMCS4_STR-CM_ED_FLAG sy-vline 
WA_RMCS4_STR-MC_CM_IDXF sy-vline 
WA_RMCS4_STR-MC_CM_DCTB sy-vline 
WA_RMCS4_STR-MC_CM_PSIZE sy-vline 
WA_RMCS4_STR-MC_CM_ENQT sy-vline 
WA_RMCS4_STR-MC_CM_SSEL sy-vline 
WA_RMCS4_STR-MC_CM_NOINIT sy-vline 
WA_RMCS4_STR-MC_CM_PARAL sy-vline      INTO ld_text SEPARATED BY SPACE.

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