ABAP Select data from SAP table FMEF_REFDATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FMEF_REFDATA
*  INTO TABLE @DATA(IT_FMEF_REFDATA2).
*--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_FMEF_REFDATA INDEX 1 INTO DATA(WA_FMEF_REFDATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FMEF_REFDATA>-REF = 1.
<FMEF_REFDATA>-AWTYP = 1.
<FMEF_REFDATA>-AWREF = 1.
<FMEF_REFDATA>-AWORG = 1.
<FMEF_REFDATA>-AWSYS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FMEF_REFDATA-AWPOS, sy-vline,
  WA_FMEF_REFDATA-BUKRS, sy-vline,
  WA_FMEF_REFDATA-VRGNG, sy-vline,
  WA_FMEF_REFDATA-BELNR, sy-vline,
  WA_FMEF_REFDATA-BLPOS, sy-vline,
  WA_FMEF_REFDATA-EBELN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FMEF_REFDATA 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_FMEF_REFDATA 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_FMEF_REFDATA INTO WA_FMEF_REFDATA.


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

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

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

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

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_FMEF_REFDATA-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMEF_REFDATA-GJAHR.
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_FMEF_REFDATA_STR, 
REF TYPE STRING,
AWTYP TYPE STRING,
AWREF TYPE STRING,
AWORG TYPE STRING,
AWSYS TYPE STRING,
AWPOS TYPE STRING,
BUKRS TYPE STRING,
VRGNG TYPE STRING,
BELNR TYPE STRING,
BLPOS TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
ZEKKN TYPE STRING,
GJAHR TYPE STRING,
WAERS TYPE STRING,
HWAER TYPE STRING,
WTGES TYPE STRING,
HWGES TYPE STRING,
WTGESAPP TYPE STRING,
HWGESAPP TYPE STRING,
WWERT TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
TRANSDAT TYPE STRING,
TRANSPER TYPE STRING,
ERLKZ TYPE STRING,
LOEKZ TYPE STRING,
ATEXT TYPE STRING,
ERLKZ_RESET TYPE STRING,
STATS TYPE STRING,
STOKZ TYPE STRING,
FIKEY TYPE STRING,
FLG_POSTED TYPE STRING,
FLG_READED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FMEF_REFDATA_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_FMEF_REFDATA_STR-REF sy-vline 
WA_FMEF_REFDATA_STR-AWTYP sy-vline 
WA_FMEF_REFDATA_STR-AWREF sy-vline 
WA_FMEF_REFDATA_STR-AWORG sy-vline 
WA_FMEF_REFDATA_STR-AWSYS sy-vline 
WA_FMEF_REFDATA_STR-AWPOS sy-vline 
WA_FMEF_REFDATA_STR-BUKRS sy-vline 
WA_FMEF_REFDATA_STR-VRGNG sy-vline 
WA_FMEF_REFDATA_STR-BELNR sy-vline 
WA_FMEF_REFDATA_STR-BLPOS sy-vline 
WA_FMEF_REFDATA_STR-EBELN sy-vline 
WA_FMEF_REFDATA_STR-EBELP sy-vline 
WA_FMEF_REFDATA_STR-ZEKKN sy-vline 
WA_FMEF_REFDATA_STR-GJAHR sy-vline 
WA_FMEF_REFDATA_STR-WAERS sy-vline 
WA_FMEF_REFDATA_STR-HWAER sy-vline 
WA_FMEF_REFDATA_STR-WTGES sy-vline 
WA_FMEF_REFDATA_STR-HWGES sy-vline 
WA_FMEF_REFDATA_STR-WTGESAPP sy-vline 
WA_FMEF_REFDATA_STR-HWGESAPP sy-vline 
WA_FMEF_REFDATA_STR-WWERT sy-vline 
WA_FMEF_REFDATA_STR-BLDAT sy-vline 
WA_FMEF_REFDATA_STR-BUDAT sy-vline 
WA_FMEF_REFDATA_STR-TRANSDAT sy-vline 
WA_FMEF_REFDATA_STR-TRANSPER sy-vline 
WA_FMEF_REFDATA_STR-ERLKZ sy-vline 
WA_FMEF_REFDATA_STR-LOEKZ sy-vline 
WA_FMEF_REFDATA_STR-ATEXT sy-vline 
WA_FMEF_REFDATA_STR-ERLKZ_RESET sy-vline 
WA_FMEF_REFDATA_STR-STATS sy-vline 
WA_FMEF_REFDATA_STR-STOKZ sy-vline 
WA_FMEF_REFDATA_STR-FIKEY sy-vline 
WA_FMEF_REFDATA_STR-FLG_POSTED sy-vline 
WA_FMEF_REFDATA_STR-FLG_READED sy-vline      INTO ld_text SEPARATED BY SPACE.

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