ABAP Select data from SAP table RMCP7 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RMCP7 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 RMCP7. 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 RMCP7 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_RMCP7 TYPE STANDARD TABLE OF RMCP7,
      WA_RMCP7 TYPE RMCP7,
      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: <RMCP7> TYPE RMCP7.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RMCP7.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RMCP7
  INTO TABLE IT_RMCP7.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RMCP7
*  INTO TABLE @DATA(IT_RMCP72).
*--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_RMCP7 INDEX 1 INTO DATA(WA_RMCP72).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RMCP7 ASSIGNING <RMCP7>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RMCP7>-MANDT = 1.
<RMCP7>-ERNMR = 1.
<RMCP7>-ERTYP = 1.
<RMCP7>-EREST = 1.
<RMCP7>-SPRAS = 1.

ENDLOOP.

LOOP AT IT_RMCP7 INTO WA_RMCP7.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RMCP7-ERETX, sy-vline,
  WA_RMCP7-ETXNR, sy-vline,
  WA_RMCP7-ERPOS, sy-vline,
  WA_RMCP7-PERKZ, sy-vline,
  WA_RMCP7-PERIV, sy-vline,
  WA_RMCP7-ANZEP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RMCP7 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_RMCP7 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_RMCP7 INTO WA_RMCP7.


*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_RMCP7-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMCP7-SPRAS.
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_RMCP7_STR, 
MANDT TYPE STRING,
ERNMR TYPE STRING,
ERTYP TYPE STRING,
EREST TYPE STRING,
SPRAS TYPE STRING,
ERETX TYPE STRING,
ETXNR TYPE STRING,
ERPOS TYPE STRING,
PERKZ TYPE STRING,
PERIV TYPE STRING,
ANZEP TYPE STRING,
OPERA TYPE STRING,
ERVAL TYPE STRING,
PLOBJ TYPE STRING,
RELDA TYPE STRING,
VRSIO TYPE STRING,
SSOUR TYPE STRING,
RELST TYPE STRING,
REVLU TYPE STRING,
MCINF TYPE STRING,
GSTRU TYPE STRING,
RFERE TYPE STRING,
RELTX TYPE STRING,
ETXN1 TYPE STRING,
AWAHL TYPE STRING,
AWAH1 TYPE STRING,
AWAH2 TYPE STRING,
ETXTY TYPE STRING,
STATX TYPE STRING,
PERIO TYPE STRING,
WERTR TYPE STRING,
WERTD TYPE STRING,
WERTA TYPE STRING,
EPLMI TYPE STRING,
PROZ1 TYPE STRING,
PROZ2 TYPE STRING,
EPLUS TYPE STRING,
EMINU TYPE STRING,
REFER TYPE STRING,
FTEXT TYPE STRING,
VETXT TYPE STRING,
VUNAM TYPE STRING,
VUDAT TYPE STRING,
ERSTA TYPE STRING,
ERSTI TYPE STRING,
ERTYA TYPE STRING,
ERTYR TYPE STRING,
ERTYB TYPE STRING,
ZEILE TYPE STRING,
DESCR TYPE STRING,
CDAT TYPE STRING,
CTIME TYPE STRING,
AUTOR TYPE STRING,
UDAT TYPE STRING,
UPNAM TYPE STRING,
UTIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RMCP7_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_RMCP7_STR-MANDT sy-vline 
WA_RMCP7_STR-ERNMR sy-vline 
WA_RMCP7_STR-ERTYP sy-vline 
WA_RMCP7_STR-EREST sy-vline 
WA_RMCP7_STR-SPRAS sy-vline 
WA_RMCP7_STR-ERETX sy-vline 
WA_RMCP7_STR-ETXNR sy-vline 
WA_RMCP7_STR-ERPOS sy-vline 
WA_RMCP7_STR-PERKZ sy-vline 
WA_RMCP7_STR-PERIV sy-vline 
WA_RMCP7_STR-ANZEP sy-vline 
WA_RMCP7_STR-OPERA sy-vline 
WA_RMCP7_STR-ERVAL sy-vline 
WA_RMCP7_STR-PLOBJ sy-vline 
WA_RMCP7_STR-RELDA sy-vline 
WA_RMCP7_STR-VRSIO sy-vline 
WA_RMCP7_STR-SSOUR sy-vline 
WA_RMCP7_STR-RELST sy-vline 
WA_RMCP7_STR-REVLU sy-vline 
WA_RMCP7_STR-MCINF sy-vline 
WA_RMCP7_STR-GSTRU sy-vline 
WA_RMCP7_STR-RFERE sy-vline 
WA_RMCP7_STR-RELTX sy-vline 
WA_RMCP7_STR-ETXN1 sy-vline 
WA_RMCP7_STR-AWAHL sy-vline 
WA_RMCP7_STR-AWAH1 sy-vline 
WA_RMCP7_STR-AWAH2 sy-vline 
WA_RMCP7_STR-ETXTY sy-vline 
WA_RMCP7_STR-STATX sy-vline 
WA_RMCP7_STR-PERIO sy-vline 
WA_RMCP7_STR-WERTR sy-vline 
WA_RMCP7_STR-WERTD sy-vline 
WA_RMCP7_STR-WERTA sy-vline 
WA_RMCP7_STR-EPLMI sy-vline 
WA_RMCP7_STR-PROZ1 sy-vline 
WA_RMCP7_STR-PROZ2 sy-vline 
WA_RMCP7_STR-EPLUS sy-vline 
WA_RMCP7_STR-EMINU sy-vline 
WA_RMCP7_STR-REFER sy-vline 
WA_RMCP7_STR-FTEXT sy-vline 
WA_RMCP7_STR-VETXT sy-vline 
WA_RMCP7_STR-VUNAM sy-vline 
WA_RMCP7_STR-VUDAT sy-vline 
WA_RMCP7_STR-ERSTA sy-vline 
WA_RMCP7_STR-ERSTI sy-vline 
WA_RMCP7_STR-ERTYA sy-vline 
WA_RMCP7_STR-ERTYR sy-vline 
WA_RMCP7_STR-ERTYB sy-vline 
WA_RMCP7_STR-ZEILE sy-vline 
WA_RMCP7_STR-DESCR sy-vline 
WA_RMCP7_STR-CDAT sy-vline 
WA_RMCP7_STR-CTIME sy-vline 
WA_RMCP7_STR-AUTOR sy-vline 
WA_RMCP7_STR-UDAT sy-vline 
WA_RMCP7_STR-UPNAM sy-vline 
WA_RMCP7_STR-UTIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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