ABAP Select data from SAP table FDAU into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FDAU
*  INTO TABLE @DATA(IT_FDAU2).
*--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_FDAU INDEX 1 INTO DATA(WA_FDAU2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FDAU>-MANDT = 1.
<FDAU>-ARCHK = 1.
<FDAU>-BUKRS = 1.
<FDAU>-BNKKO = 1.
<FDAU>-GRUPP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FDAU-EBENE, sy-vline,
  WA_FDAU-DISPW, sy-vline,
  WA_FDAU-DATUM, sy-vline,
  WA_FDAU-IDENR, sy-vline,
  WA_FDAU-GSBER, sy-vline,
  WA_FDAU-ITMNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FDAU 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_FDAU 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_FDAU INTO WA_FDAU.


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

*Conversion exit ALPHA, internal->external for field GRUPP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FDAU-GRUPP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDAU-GRUPP.
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_FDAU_STR, 
MANDT TYPE STRING,
ARCHK TYPE STRING,
BUKRS TYPE STRING,
BNKKO TYPE STRING,
GRUPP TYPE STRING,
EBENE TYPE STRING,
DISPW TYPE STRING,
DATUM TYPE STRING,
IDENR TYPE STRING,
GSBER TYPE STRING,
ITMNR TYPE STRING,
USRID TYPE STRING,
EDATE TYPE STRING,
ETIME TYPE STRING,
AUTHC TYPE STRING,
CKVAL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FDAU_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_FDAU_STR-MANDT sy-vline 
WA_FDAU_STR-ARCHK sy-vline 
WA_FDAU_STR-BUKRS sy-vline 
WA_FDAU_STR-BNKKO sy-vline 
WA_FDAU_STR-GRUPP sy-vline 
WA_FDAU_STR-EBENE sy-vline 
WA_FDAU_STR-DISPW sy-vline 
WA_FDAU_STR-DATUM sy-vline 
WA_FDAU_STR-IDENR sy-vline 
WA_FDAU_STR-GSBER sy-vline 
WA_FDAU_STR-ITMNR sy-vline 
WA_FDAU_STR-USRID sy-vline 
WA_FDAU_STR-EDATE sy-vline 
WA_FDAU_STR-ETIME sy-vline 
WA_FDAU_STR-AUTHC sy-vline 
WA_FDAU_STR-CKVAL sy-vline      INTO ld_text SEPARATED BY SPACE.

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