ABAP Select data from SAP table RFDUZI01 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 RFDUZI01 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 RFDUZI01. 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 RFDUZI01 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_RFDUZI01 TYPE STANDARD TABLE OF RFDUZI01,
      WA_RFDUZI01 TYPE RFDUZI01,
      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: <RFDUZI01> TYPE RFDUZI01.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RFDUZI01.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RFDUZI01
  INTO TABLE IT_RFDUZI01.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFDUZI01
*  INTO TABLE @DATA(IT_RFDUZI012).
*--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_RFDUZI01 INDEX 1 INTO DATA(WA_RFDUZI012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RFDUZI01 ASSIGNING <RFDUZI01>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFDUZI01>-KUNNR = 1.
<RFDUZI01>-VONDT = 1.
<RFDUZI01>-BISDT = 1.
<RFDUZI01>-ZNSZL = 1.
<RFDUZI01>-DMSHB = 1.

ENDLOOP.

LOOP AT IT_RFDUZI01 INTO WA_RFDUZI01.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFDUZI01-WRSHB, sy-vline,
  WA_RFDUZI01-BELNR, sy-vline,
  WA_RFDUZI01-DATEO, sy-vline,
  WA_RFDUZI01-DATEN, sy-vline,
  WA_RFDUZI01-TGEU, sy-vline,
  WA_RFDUZI01-SGTXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFDUZI01 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_RFDUZI01 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_RFDUZI01 INTO WA_RFDUZI01.


*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 KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFDUZI01-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDUZI01-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field ZNSZL
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_RFDUZI01-ZNSZL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDUZI01-ZNSZL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field DMSHB
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_RFDUZI01-DMSHB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDUZI01-DMSHB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field WRSHB
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_RFDUZI01-WRSHB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDUZI01-WRSHB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field NEBTR
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_RFDUZI01-NEBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDUZI01-NEBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field ZSZHW
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_RFDUZI01-ZSZHW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDUZI01-ZSZHW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field ZSZFW
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_RFDUZI01-ZSZFW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDUZI01-ZSZFW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field ZINS
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_RFDUZI01-ZINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDUZI01-ZINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field ZNBFG
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_RFDUZI01-ZNBFG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDUZI01-ZNBFG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field ZNBFW
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_RFDUZI01-ZNBFW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDUZI01-ZNBFW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field ZNBFM
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_RFDUZI01-ZNBFM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDUZI01-ZNBFM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field ZNBFS
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_RFDUZI01-ZNBFS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDUZI01-ZNBFS.
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_RFDUZI01_STR, 
KUNNR TYPE STRING,
VONDT TYPE STRING,
BISDT TYPE STRING,
ZNSZL TYPE STRING,
DMSHB TYPE STRING,
WRSHB TYPE STRING,
BELNR TYPE STRING,
DATEO TYPE STRING,
DATEN TYPE STRING,
TGEU TYPE STRING,
SGTXT TYPE STRING,
WEFAE TYPE STRING,
BLDAT TYPE STRING,
GSBER TYPE STRING,
NEBTR TYPE STRING,
ZTEXT TYPE STRING,
MWSKZ TYPE STRING,
ZSZHW TYPE STRING,
ZSZFW TYPE STRING,
ZINSS TYPE STRING,
ZINS TYPE STRING,
ZNBFG TYPE STRING,
WAERS TYPE STRING,
ZNBFW TYPE STRING,
MSATZ TYPE STRING,
ZNBFM TYPE STRING,
ZNBFS TYPE STRING,
AS_DATUM TYPE STRING,
ZWAERS TYPE STRING,
ZINSSO TYPE STRING,
ZINSSH TYPE STRING,
ZUONR TYPE STRING,
XBLNR TYPE STRING,
INLND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFDUZI01_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_RFDUZI01_STR-KUNNR sy-vline 
WA_RFDUZI01_STR-VONDT sy-vline 
WA_RFDUZI01_STR-BISDT sy-vline 
WA_RFDUZI01_STR-ZNSZL sy-vline 
WA_RFDUZI01_STR-DMSHB sy-vline 
WA_RFDUZI01_STR-WRSHB sy-vline 
WA_RFDUZI01_STR-BELNR sy-vline 
WA_RFDUZI01_STR-DATEO sy-vline 
WA_RFDUZI01_STR-DATEN sy-vline 
WA_RFDUZI01_STR-TGEU sy-vline 
WA_RFDUZI01_STR-SGTXT sy-vline 
WA_RFDUZI01_STR-WEFAE sy-vline 
WA_RFDUZI01_STR-BLDAT sy-vline 
WA_RFDUZI01_STR-GSBER sy-vline 
WA_RFDUZI01_STR-NEBTR sy-vline 
WA_RFDUZI01_STR-ZTEXT sy-vline 
WA_RFDUZI01_STR-MWSKZ sy-vline 
WA_RFDUZI01_STR-ZSZHW sy-vline 
WA_RFDUZI01_STR-ZSZFW sy-vline 
WA_RFDUZI01_STR-ZINSS sy-vline 
WA_RFDUZI01_STR-ZINS sy-vline 
WA_RFDUZI01_STR-ZNBFG sy-vline 
WA_RFDUZI01_STR-WAERS sy-vline 
WA_RFDUZI01_STR-ZNBFW sy-vline 
WA_RFDUZI01_STR-MSATZ sy-vline 
WA_RFDUZI01_STR-ZNBFM sy-vline 
WA_RFDUZI01_STR-ZNBFS sy-vline 
WA_RFDUZI01_STR-AS_DATUM sy-vline 
WA_RFDUZI01_STR-ZWAERS sy-vline 
WA_RFDUZI01_STR-ZINSSO sy-vline 
WA_RFDUZI01_STR-ZINSSH sy-vline 
WA_RFDUZI01_STR-ZUONR sy-vline 
WA_RFDUZI01_STR-XBLNR sy-vline 
WA_RFDUZI01_STR-INLND sy-vline      INTO ld_text SEPARATED BY SPACE.

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