ABAP Select data from SAP table FDM2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FDM2 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 FDM2. 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 FDM2 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_FDM2 TYPE STANDARD TABLE OF FDM2,
      WA_FDM2 TYPE FDM2,
      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: <FDM2> TYPE FDM2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_FDM2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM FDM2
  INTO TABLE IT_FDM2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FDM2
*  INTO TABLE @DATA(IT_FDM22).
*--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_FDM2 INDEX 1 INTO DATA(WA_FDM22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_FDM2 ASSIGNING <FDM2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FDM2>-MANDT = 1.
<FDM2>-RFTYP = 1.
<FDM2>-BANFN = 1.
<FDM2>-RFORG = 1.
<FDM2>-RFSYS = 1.

ENDLOOP.

LOOP AT IT_FDM2 INTO WA_FDM2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FDM2-BNFPO, sy-vline,
  WA_FDM2-ZEBKN, sy-vline,
  WA_FDM2-BUKRS, sy-vline,
  WA_FDM2-FDGRP, sy-vline,
  WA_FDM2-FDLEV, sy-vline,
  WA_FDM2-CURRD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FDM2 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_FDM2 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_FDM2 INTO WA_FDM2.


*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 BANFN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FDM2-BANFN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDM2-BANFN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RFSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FDM2-RFSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDM2-RFSYS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FDGRP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FDM2-FDGRP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDM2-FDGRP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field FDWBT
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_FDM2-FDWBT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDM2-FDWBT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field FDDBT
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_FDM2-FDDBT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDM2-FDDBT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FDM2-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDM2-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GRANT_NBR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FDM2-GRANT_NBR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDM2-GRANT_NBR.
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_FDM2_STR, 
MANDT TYPE STRING,
RFTYP TYPE STRING,
BANFN TYPE STRING,
RFORG TYPE STRING,
RFSYS TYPE STRING,
BNFPO TYPE STRING,
ZEBKN TYPE STRING,
BUKRS TYPE STRING,
FDGRP TYPE STRING,
FDLEV TYPE STRING,
CURRD TYPE STRING,
FDTAG TYPE STRING,
GSBER TYPE STRING,
FDWBT TYPE STRING,
FDDBT TYPE STRING,
LIFNR TYPE STRING,
BSTYP TYPE STRING,
GEBER TYPE STRING,
GRANT_NBR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FDM2_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_FDM2_STR-MANDT sy-vline 
WA_FDM2_STR-RFTYP sy-vline 
WA_FDM2_STR-BANFN sy-vline 
WA_FDM2_STR-RFORG sy-vline 
WA_FDM2_STR-RFSYS sy-vline 
WA_FDM2_STR-BNFPO sy-vline 
WA_FDM2_STR-ZEBKN sy-vline 
WA_FDM2_STR-BUKRS sy-vline 
WA_FDM2_STR-FDGRP sy-vline 
WA_FDM2_STR-FDLEV sy-vline 
WA_FDM2_STR-CURRD sy-vline 
WA_FDM2_STR-FDTAG sy-vline 
WA_FDM2_STR-GSBER sy-vline 
WA_FDM2_STR-FDWBT sy-vline 
WA_FDM2_STR-FDDBT sy-vline 
WA_FDM2_STR-LIFNR sy-vline 
WA_FDM2_STR-BSTYP sy-vline 
WA_FDM2_STR-GEBER sy-vline 
WA_FDM2_STR-GRANT_NBR sy-vline      INTO ld_text SEPARATED BY SPACE.

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