ABAP Select data from SAP table FDS1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FDS1 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 FDS1. 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 FDS1 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_FDS1 TYPE STANDARD TABLE OF FDS1,
      WA_FDS1 TYPE FDS1,
      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: <FDS1> TYPE FDS1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_FDS1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM FDS1
  INTO TABLE IT_FDS1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FDS1
*  INTO TABLE @DATA(IT_FDS12).
*--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_FDS1 INDEX 1 INTO DATA(WA_FDS12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_FDS1 ASSIGNING <FDS1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FDS1>-MANDT = 1.
<FDS1>-VBELN = 1.
<FDS1>-POSNR = 1.
<FDS1>-ETENR = 1.
<FDS1>-PERIV = 1.

ENDLOOP.

LOOP AT IT_FDS1 INTO WA_FDS1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FDS1-VBTYP, sy-vline,
  WA_FDS1-BUKRS, sy-vline,
  WA_FDS1-WAERK, sy-vline,
  WA_FDS1-HWAER, sy-vline,
  WA_FDS1-KUNAG, sy-vline,
  WA_FDS1-KUNRG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FDS1 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_FDS1 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_FDS1 INTO WA_FDS1.


*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 VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FDS1-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDS1-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNAG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FDS1-KUNAG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDS1-KUNAG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNRG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FDS1-KUNRG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDS1-KUNRG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field KURSK
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_FDS1-KURSK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDS1-KURSK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VGBEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FDS1-VGBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDS1-VGBEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_FDS1-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDS1-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field PREIS
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_FDS1-PREIS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDS1-PREIS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field HPREI
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_FDS1-HPREI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDS1-HPREI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FDGRV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FDS1-FDGRV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDS1-FDGRV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field DMSHB
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_FDS1-DMSHB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDS1-DMSHB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WRSHB
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_FDS1-WRSHB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDS1-WRSHB.
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_FDS1_STR, 
MANDT TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
ETENR TYPE STRING,
PERIV TYPE STRING,
VBTYP TYPE STRING,
BUKRS TYPE STRING,
WAERK TYPE STRING,
HWAER TYPE STRING,
KUNAG TYPE STRING,
KUNRG TYPE STRING,
ZTERM TYPE STRING,
ZLSCH TYPE STRING,
FKDAT TYPE STRING,
FBUDA TYPE STRING,
KURSK TYPE STRING,
GSBER TYPE STRING,
VGBEL TYPE STRING,
VGPOS TYPE STRING,
POSMENGE TYPE STRING,
ERLMENGE_L TYPE STRING,
ERLMENGE_F TYPE STRING,
FAKLMENG TYPE STRING,
EDATU TYPE STRING,
BESTMENGE TYPE STRING,
WADAT TYPE STRING,
MEINS TYPE STRING,
UNFMENG TYPE STRING,
PREIS TYPE STRING,
HPREI TYPE STRING,
EBENE TYPE STRING,
FDGRV TYPE STRING,
DATUM TYPE STRING,
DMSHB TYPE STRING,
WRSHB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FDS1_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_FDS1_STR-MANDT sy-vline 
WA_FDS1_STR-VBELN sy-vline 
WA_FDS1_STR-POSNR sy-vline 
WA_FDS1_STR-ETENR sy-vline 
WA_FDS1_STR-PERIV sy-vline 
WA_FDS1_STR-VBTYP sy-vline 
WA_FDS1_STR-BUKRS sy-vline 
WA_FDS1_STR-WAERK sy-vline 
WA_FDS1_STR-HWAER sy-vline 
WA_FDS1_STR-KUNAG sy-vline 
WA_FDS1_STR-KUNRG sy-vline 
WA_FDS1_STR-ZTERM sy-vline 
WA_FDS1_STR-ZLSCH sy-vline 
WA_FDS1_STR-FKDAT sy-vline 
WA_FDS1_STR-FBUDA sy-vline 
WA_FDS1_STR-KURSK sy-vline 
WA_FDS1_STR-GSBER sy-vline 
WA_FDS1_STR-VGBEL sy-vline 
WA_FDS1_STR-VGPOS sy-vline 
WA_FDS1_STR-POSMENGE sy-vline 
WA_FDS1_STR-ERLMENGE_L sy-vline 
WA_FDS1_STR-ERLMENGE_F sy-vline 
WA_FDS1_STR-FAKLMENG sy-vline 
WA_FDS1_STR-EDATU sy-vline 
WA_FDS1_STR-BESTMENGE sy-vline 
WA_FDS1_STR-WADAT sy-vline 
WA_FDS1_STR-MEINS sy-vline 
WA_FDS1_STR-UNFMENG sy-vline 
WA_FDS1_STR-PREIS sy-vline 
WA_FDS1_STR-HPREI sy-vline 
WA_FDS1_STR-EBENE sy-vline 
WA_FDS1_STR-FDGRV sy-vline 
WA_FDS1_STR-DATUM sy-vline 
WA_FDS1_STR-DMSHB sy-vline 
WA_FDS1_STR-WRSHB sy-vline      INTO ld_text SEPARATED BY SPACE.

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