ABAP Select data from SAP table RLMFW_S_OLC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RLMFW_S_OLC
*  INTO TABLE @DATA(IT_RLMFW_S_OLC2).
*--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_RLMFW_S_OLC INDEX 1 INTO DATA(WA_RLMFW_S_OLC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RLMFW_S_OLC>-MANDT = 1.
<RLMFW_S_OLC>-RONUM = 1.
<RLMFW_S_OLC>-LOGSYS = 1.
<RLMFW_S_OLC>-OBJTYP = 1.
<RLMFW_S_OLC>-OBJKEY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RLMFW_S_OLC-TARGET, sy-vline,
  WA_RLMFW_S_OLC-CHKID, sy-vline,
  WA_RLMFW_S_OLC-CANCEL, sy-vline,
  WA_RLMFW_S_OLC-CHKSTA, sy-vline,
  WA_RLMFW_S_OLC-CHKDAT, sy-vline,
  WA_RLMFW_S_OLC-CHKTIM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RLMFW_S_OLC 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_RLMFW_S_OLC 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_RLMFW_S_OLC INTO WA_RLMFW_S_OLC.


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

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

*Conversion exit ALPHA, internal->external for field OBJTYP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RLMFW_S_OLC-OBJTYP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLMFW_S_OLC-OBJTYP.
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_RLMFW_S_OLC_STR, 
MANDT TYPE STRING,
RONUM TYPE STRING,
LOGSYS TYPE STRING,
OBJTYP TYPE STRING,
OBJKEY TYPE STRING,
TARGET TYPE STRING,
CHKID TYPE STRING,
CANCEL TYPE STRING,
CHKSTA TYPE STRING,
CHKDAT TYPE STRING,
CHKTIM TYPE STRING,
KTEXT TYPE STRING,
HICON TYPE STRING,
LEDSTA TYPE STRING,
SWITCH TYPE STRING,
CHKTXT TYPE STRING,
FNAME TYPE STRING,
CDOKU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RLMFW_S_OLC_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_RLMFW_S_OLC_STR-MANDT sy-vline 
WA_RLMFW_S_OLC_STR-RONUM sy-vline 
WA_RLMFW_S_OLC_STR-LOGSYS sy-vline 
WA_RLMFW_S_OLC_STR-OBJTYP sy-vline 
WA_RLMFW_S_OLC_STR-OBJKEY sy-vline 
WA_RLMFW_S_OLC_STR-TARGET sy-vline 
WA_RLMFW_S_OLC_STR-CHKID sy-vline 
WA_RLMFW_S_OLC_STR-CANCEL sy-vline 
WA_RLMFW_S_OLC_STR-CHKSTA sy-vline 
WA_RLMFW_S_OLC_STR-CHKDAT sy-vline 
WA_RLMFW_S_OLC_STR-CHKTIM sy-vline 
WA_RLMFW_S_OLC_STR-KTEXT sy-vline 
WA_RLMFW_S_OLC_STR-HICON sy-vline 
WA_RLMFW_S_OLC_STR-LEDSTA sy-vline 
WA_RLMFW_S_OLC_STR-SWITCH sy-vline 
WA_RLMFW_S_OLC_STR-CHKTXT sy-vline 
WA_RLMFW_S_OLC_STR-FNAME sy-vline 
WA_RLMFW_S_OLC_STR-CDOKU sy-vline      INTO ld_text SEPARATED BY SPACE.

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