ABAP Select data from SAP table RLMFWOL into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RLMFWOL 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 RLMFWOL. 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 RLMFWOL 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_RLMFWOL TYPE STANDARD TABLE OF RLMFWOL,
      WA_RLMFWOL TYPE RLMFWOL,
      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: <RLMFWOL> TYPE RLMFWOL.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RLMFWOL
*  INTO TABLE @DATA(IT_RLMFWOL2).
*--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_RLMFWOL INDEX 1 INTO DATA(WA_RLMFWOL2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RLMFWOL-TARGET, sy-vline,
  WA_RLMFWOL-CANCEL, sy-vline,
  WA_RLMFWOL-CHGIND, sy-vline,
  WA_RLMFWOL-CHKSTA, sy-vline,
  WA_RLMFWOL-INCPLE, sy-vline,
  WA_RLMFWOL-PROBLM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RLMFWOL 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_RLMFWOL 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_RLMFWOL INTO WA_RLMFWOL.


*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_RLMFWOL-RONUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLMFWOL-RONUM.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field OBJTYP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RLMFWOL-OBJTYP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLMFWOL-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_RLMFWOL_STR, 
MANDT TYPE STRING,
RONUM TYPE STRING,
LOGSYS TYPE STRING,
OBJTYP TYPE STRING,
OBJKEY TYPE STRING,
TARGET TYPE STRING,
CANCEL TYPE STRING,
CHGIND TYPE STRING,
CHKSTA TYPE STRING,
INCPLE TYPE STRING,
PROBLM TYPE STRING,
RELSTA TYPE STRING,
RELDAT TYPE STRING,
RELTIM TYPE STRING,
REMARK TYPE STRING,
TARDAT TYPE STRING,
RESPTP TYPE STRING,
RESPID TYPE STRING,
DELIND TYPE STRING,
CONOK TYPE STRING,
OBJKEY_EXT TYPE STRING,
CHNGDAT TYPE STRING,
CHNGTIM TYPE STRING,
CHNGBY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RLMFWOL_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_RLMFWOL_STR-MANDT sy-vline 
WA_RLMFWOL_STR-RONUM sy-vline 
WA_RLMFWOL_STR-LOGSYS sy-vline 
WA_RLMFWOL_STR-OBJTYP sy-vline 
WA_RLMFWOL_STR-OBJKEY sy-vline 
WA_RLMFWOL_STR-TARGET sy-vline 
WA_RLMFWOL_STR-CANCEL sy-vline 
WA_RLMFWOL_STR-CHGIND sy-vline 
WA_RLMFWOL_STR-CHKSTA sy-vline 
WA_RLMFWOL_STR-INCPLE sy-vline 
WA_RLMFWOL_STR-PROBLM sy-vline 
WA_RLMFWOL_STR-RELSTA sy-vline 
WA_RLMFWOL_STR-RELDAT sy-vline 
WA_RLMFWOL_STR-RELTIM sy-vline 
WA_RLMFWOL_STR-REMARK sy-vline 
WA_RLMFWOL_STR-TARDAT sy-vline 
WA_RLMFWOL_STR-RESPTP sy-vline 
WA_RLMFWOL_STR-RESPID sy-vline 
WA_RLMFWOL_STR-DELIND sy-vline 
WA_RLMFWOL_STR-CONOK sy-vline 
WA_RLMFWOL_STR-OBJKEY_EXT sy-vline 
WA_RLMFWOL_STR-CHNGDAT sy-vline 
WA_RLMFWOL_STR-CHNGTIM sy-vline 
WA_RLMFWOL_STR-CHNGBY sy-vline      INTO ld_text SEPARATED BY SPACE.

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