ABAP Select data from SAP table RM08K into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RM08K 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 RM08K. 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 RM08K 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_RM08K TYPE STANDARD TABLE OF RM08K,
      WA_RM08K TYPE RM08K,
      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: <RM08K> TYPE RM08K.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RM08K.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RM08K
  INTO TABLE IT_RM08K.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RM08K
*  INTO TABLE @DATA(IT_RM08K2).
*--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_RM08K INDEX 1 INTO DATA(WA_RM08K2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RM08K ASSIGNING <RM08K>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RM08K>-ALTMO = 1.
<RM08K>-AUTO = 1.
<RM08K>-BUZEI = 1.
<RM08K>-DMENG = 1.
<RM08K>-DPROZ = 1.

ENDLOOP.

LOOP AT IT_RM08K INTO WA_RM08K.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RM08K-DWERT, sy-vline,
  WA_RM08K-EBELN, sy-vline,
  WA_RM08K-EBELN1, sy-vline,
  WA_RM08K-EBELN2, sy-vline,
  WA_RM08K-EBELN3, sy-vline,
  WA_RM08K-EBELP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RM08K 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_RM08K 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_RM08K INTO WA_RM08K.


*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 ALPHA, internal->external for field EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RM08K-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM08K-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EBELN1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RM08K-EBELN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM08K-EBELN1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EBELN2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RM08K-EBELN2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM08K-EBELN2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EBELN3
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RM08K-EBELN3
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM08K-EBELN3.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RM08K-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM08K-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RM08K-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM08K-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RM08K-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM08K-MEINS.
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_RM08K_STR, 
ALTMO TYPE STRING,
AUTO TYPE STRING,
BUZEI TYPE STRING,
DMENG TYPE STRING,
DPROZ TYPE STRING,
DWERT TYPE STRING,
EBELN TYPE STRING,
EBELN1 TYPE STRING,
EBELN2 TYPE STRING,
EBELN3 TYPE STRING,
EBELP TYPE STRING,
EBELP1 TYPE STRING,
EBELP2 TYPE STRING,
EBELP3 TYPE STRING,
LIFNR TYPE STRING,
LISTE TYPE STRING,
MAXSEITE TYPE STRING,
MATNR TYPE STRING,
MEINS TYPE STRING,
REMNG TYPE STRING,
REUEB TYPE STRING,
SEITE TYPE STRING,
SELKZ TYPE STRING,
SELKZ_KPS1 TYPE STRING,
SELKZ_KPS2 TYPE STRING,
SELKZ_KPS3 TYPE STRING,
TXZ01 TYPE STRING,
WAERS TYPE STRING,
WEMNG TYPE STRING,
WERKS TYPE STRING,
WEUEB TYPE STRING,
RETPO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RM08K_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_RM08K_STR-ALTMO sy-vline 
WA_RM08K_STR-AUTO sy-vline 
WA_RM08K_STR-BUZEI sy-vline 
WA_RM08K_STR-DMENG sy-vline 
WA_RM08K_STR-DPROZ sy-vline 
WA_RM08K_STR-DWERT sy-vline 
WA_RM08K_STR-EBELN sy-vline 
WA_RM08K_STR-EBELN1 sy-vline 
WA_RM08K_STR-EBELN2 sy-vline 
WA_RM08K_STR-EBELN3 sy-vline 
WA_RM08K_STR-EBELP sy-vline 
WA_RM08K_STR-EBELP1 sy-vline 
WA_RM08K_STR-EBELP2 sy-vline 
WA_RM08K_STR-EBELP3 sy-vline 
WA_RM08K_STR-LIFNR sy-vline 
WA_RM08K_STR-LISTE sy-vline 
WA_RM08K_STR-MAXSEITE sy-vline 
WA_RM08K_STR-MATNR sy-vline 
WA_RM08K_STR-MEINS sy-vline 
WA_RM08K_STR-REMNG sy-vline 
WA_RM08K_STR-REUEB sy-vline 
WA_RM08K_STR-SEITE sy-vline 
WA_RM08K_STR-SELKZ sy-vline 
WA_RM08K_STR-SELKZ_KPS1 sy-vline 
WA_RM08K_STR-SELKZ_KPS2 sy-vline 
WA_RM08K_STR-SELKZ_KPS3 sy-vline 
WA_RM08K_STR-TXZ01 sy-vline 
WA_RM08K_STR-WAERS sy-vline 
WA_RM08K_STR-WEMNG sy-vline 
WA_RM08K_STR-WERKS sy-vline 
WA_RM08K_STR-WEUEB sy-vline 
WA_RM08K_STR-RETPO sy-vline      INTO ld_text SEPARATED BY SPACE.

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