ABAP Select data from SAP table RM61S into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RM61S 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 RM61S. 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 RM61S 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_RM61S TYPE STANDARD TABLE OF RM61S,
      WA_RM61S TYPE RM61S,
      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: <RM61S> TYPE RM61S.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RM61S.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RM61S
  INTO TABLE IT_RM61S.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RM61S
*  INTO TABLE @DATA(IT_RM61S2).
*--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_RM61S INDEX 1 INTO DATA(WA_RM61S2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RM61S ASSIGNING <RM61S>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RM61S>-MANDT = 1.
<RM61S>-SERNR = 1.
<RM61S>-BRUTR = 1.
<RM61S>-TECHS = 1.
<RM61S>-SONDB = 1.

ENDLOOP.

LOOP AT IT_RM61S INTO WA_RM61S.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RM61S-MATNR, sy-vline,
  WA_RM61S-WERKS, sy-vline,
  WA_RM61S-SNTXT, sy-vline,
  WA_RM61S-BGNSN, sy-vline,
  WA_RM61S-ENDSN, sy-vline,
  WA_RM61S-MAXNS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RM61S 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_RM61S 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_RM61S INTO WA_RM61S.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RM61S-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM61S-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field HDMAT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RM61S-HDMAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM61S-HDMAT.
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_RM61S_STR, 
MANDT TYPE STRING,
SERNR TYPE STRING,
BRUTR TYPE STRING,
TECHS TYPE STRING,
SONDB TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
SNTXT TYPE STRING,
BGNSN TYPE STRING,
ENDSN TYPE STRING,
MAXNS TYPE STRING,
FNDSN TYPE STRING,
MARK TYPE STRING,
PANEW TYPE STRING,
PASUM TYPE STRING,
MAKTX TYPE STRING,
STATUS TYPE STRING,
SNSTA TYPE STRING,
ALSER TYPE STRING,
HDSEN TYPE STRING,
HDWRK TYPE STRING,
HDSNT TYPE STRING,
HDBRT TYPE STRING,
HDMAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RM61S_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_RM61S_STR-MANDT sy-vline 
WA_RM61S_STR-SERNR sy-vline 
WA_RM61S_STR-BRUTR sy-vline 
WA_RM61S_STR-TECHS sy-vline 
WA_RM61S_STR-SONDB sy-vline 
WA_RM61S_STR-MATNR sy-vline 
WA_RM61S_STR-WERKS sy-vline 
WA_RM61S_STR-SNTXT sy-vline 
WA_RM61S_STR-BGNSN sy-vline 
WA_RM61S_STR-ENDSN sy-vline 
WA_RM61S_STR-MAXNS sy-vline 
WA_RM61S_STR-FNDSN sy-vline 
WA_RM61S_STR-MARK sy-vline 
WA_RM61S_STR-PANEW sy-vline 
WA_RM61S_STR-PASUM sy-vline 
WA_RM61S_STR-MAKTX sy-vline 
WA_RM61S_STR-STATUS sy-vline 
WA_RM61S_STR-SNSTA sy-vline 
WA_RM61S_STR-ALSER sy-vline 
WA_RM61S_STR-HDSEN sy-vline 
WA_RM61S_STR-HDWRK sy-vline 
WA_RM61S_STR-HDSNT sy-vline 
WA_RM61S_STR-HDBRT sy-vline 
WA_RM61S_STR-HDMAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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