ABAP Select data from SAP table RM61N into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RM61N 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 RM61N. 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 RM61N 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_RM61N TYPE STANDARD TABLE OF RM61N,
      WA_RM61N TYPE RM61N,
      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: <RM61N> TYPE RM61N.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RM61N.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RM61N
  INTO TABLE IT_RM61N.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RM61N
*  INTO TABLE @DATA(IT_RM61N2).
*--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_RM61N INDEX 1 INTO DATA(WA_RM61N2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RM61N ASSIGNING <RM61N>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RM61N>-BESKZ = 1.
<RM61N>-COLOR = 1.
<RM61N>-DELB1 = 1.
<RM61N>-DELEM = 1.
<RM61N>-DELKZ = 1.

ENDLOOP.

LOOP AT IT_RM61N INTO WA_RM61N.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RM61N-DELTX, sy-vline,
  WA_RM61N-DESGN, sy-vline,
  WA_RM61N-EVTYP, sy-vline,
  WA_RM61N-FCODE, sy-vline,
  WA_RM61N-FIX01, sy-vline,
  WA_RM61N-INOMRP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RM61N 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_RM61N 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_RM61N INTO WA_RM61N.


*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_RM61N_STR, 
BESKZ TYPE STRING,
COLOR TYPE STRING,
DELB1 TYPE STRING,
DELEM TYPE STRING,
DELKZ TYPE STRING,
DELTX TYPE STRING,
DESGN TYPE STRING,
EVTYP TYPE STRING,
FCODE TYPE STRING,
FIX01 TYPE STRING,
INOMRP TYPE STRING,
INTAK TYPE STRING,
LEAF_ TYPE STRING,
LEVEL TYPE STRING,
MDPRF TYPE STRING,
MDPRF_OLD TYPE STRING,
MDTXT TYPE STRING,
NOFIX TYPE STRING,
NOVRF TYPE STRING,
PRAST TYPE STRING,
SHOW TYPE STRING,
SIGN1 TYPE STRING,
SLATC TYPE STRING,
SLATP TYPE STRING,
SLAVL TYPE STRING,
SLCOVERAGE TYPE STRING,
SLDEMAND TYPE STRING,
SLFORECAST TYPE STRING,
SL_PG_SALE TYPE STRING,
SL_PG_PRDC TYPE STRING,
SL_PG_STCK TYPE STRING,
SL_PG_GOAL TYPE STRING,
SLINP TYPE STRING,
SLOUT TYPE STRING,
SLSOBD TYPE STRING,
SLSOBE TYPE STRING,
SLSOBM TYPE STRING,
SLSOBP TYPE STRING,
SLSOBR TYPE STRING,
SLSOBV TYPE STRING,
SLSOBF TYPE STRING,
SLSOBU TYPE STRING,
SLSOBK TYPE STRING,
SLSOBL TYPE STRING,
SLVERU TYPE STRING,
SLVERE TYPE STRING,
SPFUN TYPE STRING,
TYPEC TYPE STRING,
UPDATE TYPE STRING,
USPRF TYPE STRING,
USTEX TYPE STRING,
ZUSDA TYPE STRING,
SELKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RM61N_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_RM61N_STR-BESKZ sy-vline 
WA_RM61N_STR-COLOR sy-vline 
WA_RM61N_STR-DELB1 sy-vline 
WA_RM61N_STR-DELEM sy-vline 
WA_RM61N_STR-DELKZ sy-vline 
WA_RM61N_STR-DELTX sy-vline 
WA_RM61N_STR-DESGN sy-vline 
WA_RM61N_STR-EVTYP sy-vline 
WA_RM61N_STR-FCODE sy-vline 
WA_RM61N_STR-FIX01 sy-vline 
WA_RM61N_STR-INOMRP sy-vline 
WA_RM61N_STR-INTAK sy-vline 
WA_RM61N_STR-LEAF_ sy-vline 
WA_RM61N_STR-LEVEL sy-vline 
WA_RM61N_STR-MDPRF sy-vline 
WA_RM61N_STR-MDPRF_OLD sy-vline 
WA_RM61N_STR-MDTXT sy-vline 
WA_RM61N_STR-NOFIX sy-vline 
WA_RM61N_STR-NOVRF sy-vline 
WA_RM61N_STR-PRAST sy-vline 
WA_RM61N_STR-SHOW sy-vline 
WA_RM61N_STR-SIGN1 sy-vline 
WA_RM61N_STR-SLATC sy-vline 
WA_RM61N_STR-SLATP sy-vline 
WA_RM61N_STR-SLAVL sy-vline 
WA_RM61N_STR-SLCOVERAGE sy-vline 
WA_RM61N_STR-SLDEMAND sy-vline 
WA_RM61N_STR-SLFORECAST sy-vline 
WA_RM61N_STR-SL_PG_SALE sy-vline 
WA_RM61N_STR-SL_PG_PRDC sy-vline 
WA_RM61N_STR-SL_PG_STCK sy-vline 
WA_RM61N_STR-SL_PG_GOAL sy-vline 
WA_RM61N_STR-SLINP sy-vline 
WA_RM61N_STR-SLOUT sy-vline 
WA_RM61N_STR-SLSOBD sy-vline 
WA_RM61N_STR-SLSOBE sy-vline 
WA_RM61N_STR-SLSOBM sy-vline 
WA_RM61N_STR-SLSOBP sy-vline 
WA_RM61N_STR-SLSOBR sy-vline 
WA_RM61N_STR-SLSOBV sy-vline 
WA_RM61N_STR-SLSOBF sy-vline 
WA_RM61N_STR-SLSOBU sy-vline 
WA_RM61N_STR-SLSOBK sy-vline 
WA_RM61N_STR-SLSOBL sy-vline 
WA_RM61N_STR-SLVERU sy-vline 
WA_RM61N_STR-SLVERE sy-vline 
WA_RM61N_STR-SPFUN sy-vline 
WA_RM61N_STR-TYPEC sy-vline 
WA_RM61N_STR-UPDATE sy-vline 
WA_RM61N_STR-USPRF sy-vline 
WA_RM61N_STR-USTEX sy-vline 
WA_RM61N_STR-ZUSDA sy-vline 
WA_RM61N_STR-SELKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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