ABAP Select data from SAP table RM61H into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RM61H 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 RM61H. 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 RM61H 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_RM61H TYPE STANDARD TABLE OF RM61H,
      WA_RM61H TYPE RM61H,
      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: <RM61H> TYPE RM61H.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RM61H.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RM61H
  INTO TABLE IT_RM61H.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RM61H
*  INTO TABLE @DATA(IT_RM61H2).
*--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_RM61H INDEX 1 INTO DATA(WA_RM61H2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RM61H ASSIGNING <RM61H>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RM61H>-BISDT = 1.
<RM61H>-DIBEZ = 1.
<RM61H>-DISMM = 1.
<RM61H>-DISPO = 1.
<RM61H>-DISSL = 1.

ENDLOOP.

LOOP AT IT_RM61H INTO WA_RM61H.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RM61H-DSNAM, sy-vline,
  WA_RM61H-FCODE, sy-vline,
  WA_RM61H-FIXOF, sy-vline,
  WA_RM61H-FIXTR, sy-vline,
  WA_RM61H-GSMNG, sy-vline,
  WA_RM61H-KTEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RM61H 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_RM61H 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_RM61H INTO WA_RM61H.


*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_RM61H-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM61H-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RM61H-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM61H-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SAFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RM61H-SAFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM61H-SAFNR.
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_RM61H_STR, 
BISDT TYPE STRING,
DIBEZ TYPE STRING,
DISMM TYPE STRING,
DISPO TYPE STRING,
DISSL TYPE STRING,
DSNAM TYPE STRING,
FCODE TYPE STRING,
FIXOF TYPE STRING,
FIXTR TYPE STRING,
GSMNG TYPE STRING,
KTEXT TYPE STRING,
LINE1 TYPE STRING,
LINSL TYPE STRING,
MAKTX TYPE STRING,
MATNR TYPE STRING,
MATSL TYPE STRING,
MDV01 TYPE STRING,
MDV01TX TYPE STRING,
MDV02 TYPE STRING,
MDV02TX TYPE STRING,
MEINS TYPE STRING,
MITFX TYPE STRING,
NOTFX TYPE STRING,
PAGES TYPE STRING,
PAGE1 TYPE STRING,
PEDTR TYPE STRING,
PLAFX TYPE STRING,
PLNSL TYPE STRING,
PLNTX TYPE STRING,
PLWRK TYPE STRING,
PSTTR TYPE STRING,
SAFNR TYPE STRING,
SLDAY TYPE STRING,
VERID TYPE STRING,
VERSL TYPE STRING,
VERTX TYPE STRING,
WERKS TYPE STRING,
WRKTX TYPE STRING,
PSPSL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RM61H_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_RM61H_STR-BISDT sy-vline 
WA_RM61H_STR-DIBEZ sy-vline 
WA_RM61H_STR-DISMM sy-vline 
WA_RM61H_STR-DISPO sy-vline 
WA_RM61H_STR-DISSL sy-vline 
WA_RM61H_STR-DSNAM sy-vline 
WA_RM61H_STR-FCODE sy-vline 
WA_RM61H_STR-FIXOF sy-vline 
WA_RM61H_STR-FIXTR sy-vline 
WA_RM61H_STR-GSMNG sy-vline 
WA_RM61H_STR-KTEXT sy-vline 
WA_RM61H_STR-LINE1 sy-vline 
WA_RM61H_STR-LINSL sy-vline 
WA_RM61H_STR-MAKTX sy-vline 
WA_RM61H_STR-MATNR sy-vline 
WA_RM61H_STR-MATSL sy-vline 
WA_RM61H_STR-MDV01 sy-vline 
WA_RM61H_STR-MDV01TX sy-vline 
WA_RM61H_STR-MDV02 sy-vline 
WA_RM61H_STR-MDV02TX sy-vline 
WA_RM61H_STR-MEINS sy-vline 
WA_RM61H_STR-MITFX sy-vline 
WA_RM61H_STR-NOTFX sy-vline 
WA_RM61H_STR-PAGES sy-vline 
WA_RM61H_STR-PAGE1 sy-vline 
WA_RM61H_STR-PEDTR sy-vline 
WA_RM61H_STR-PLAFX sy-vline 
WA_RM61H_STR-PLNSL sy-vline 
WA_RM61H_STR-PLNTX sy-vline 
WA_RM61H_STR-PLWRK sy-vline 
WA_RM61H_STR-PSTTR sy-vline 
WA_RM61H_STR-SAFNR sy-vline 
WA_RM61H_STR-SLDAY sy-vline 
WA_RM61H_STR-VERID sy-vline 
WA_RM61H_STR-VERSL sy-vline 
WA_RM61H_STR-VERTX sy-vline 
WA_RM61H_STR-WERKS sy-vline 
WA_RM61H_STR-WRKTX sy-vline 
WA_RM61H_STR-PSPSL sy-vline      INTO ld_text SEPARATED BY SPACE.

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