ABAP Select data from SAP table RIHMEL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RIHMEL
*  INTO TABLE @DATA(IT_RIHMEL2).
*--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_RIHMEL INDEX 1 INTO DATA(WA_RIHMEL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RIHMEL>-MANDT = 1.
<RIHMEL>-SORTF = 1.
<RIHMEL>-OBLIG = 1.
<RIHMEL>-POINT = 1.
<RIHMEL>-INDCT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RIHMEL-PTTXT, sy-vline,
  WA_RIHMEL-PSORT, sy-vline,
  WA_RIHMEL-INACT, sy-vline,
  WA_RIHMEL-LVORM, sy-vline,
  WA_RIHMEL-CODGR, sy-vline,
  WA_RIHMEL-INDTR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RIHMEL 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_RIHMEL 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_RIHMEL INTO WA_RIHMEL.


*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 POINT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RIHMEL-POINT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RIHMEL-POINT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit LUNIT, internal->external for field UNITC
CALL FUNCTION 'CONVERSION_EXIT_LUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RIHMEL-UNITC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RIHMEL-UNITC.
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_RIHMEL_STR, 
MANDT TYPE STRING,
SORTF TYPE STRING,
OBLIG TYPE STRING,
POINT TYPE STRING,
INDCT TYPE STRING,
PTTXT TYPE STRING,
PSORT TYPE STRING,
INACT TYPE STRING,
LVORM TYPE STRING,
CODGR TYPE STRING,
INDTR TYPE STRING,
ATNAM TYPE STRING,
UNITC TYPE STRING,
OBART_LD TYPE STRING,
MPOBK TYPE STRING,
MPOBT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RIHMEL_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_RIHMEL_STR-MANDT sy-vline 
WA_RIHMEL_STR-SORTF sy-vline 
WA_RIHMEL_STR-OBLIG sy-vline 
WA_RIHMEL_STR-POINT sy-vline 
WA_RIHMEL_STR-INDCT sy-vline 
WA_RIHMEL_STR-PTTXT sy-vline 
WA_RIHMEL_STR-PSORT sy-vline 
WA_RIHMEL_STR-INACT sy-vline 
WA_RIHMEL_STR-LVORM sy-vline 
WA_RIHMEL_STR-CODGR sy-vline 
WA_RIHMEL_STR-INDTR sy-vline 
WA_RIHMEL_STR-ATNAM sy-vline 
WA_RIHMEL_STR-UNITC sy-vline 
WA_RIHMEL_STR-OBART_LD sy-vline 
WA_RIHMEL_STR-MPOBK sy-vline 
WA_RIHMEL_STR-MPOBT sy-vline      INTO ld_text SEPARATED BY SPACE.

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