ABAP Select data from SAP table AUFNR_REL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AUFNR_REL
*  INTO TABLE @DATA(IT_AUFNR_REL2).
*--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_AUFNR_REL INDEX 1 INTO DATA(WA_AUFNR_REL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AUFNR_REL>-AUFNR = 1.
<AUFNR_REL>-AUFPL = 1.
<AUFNR_REL>-RSNUM = 1.
<AUFNR_REL>-AUTYP = 1.
<AUFNR_REL>-AUART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AUFNR_REL-WERKS, sy-vline,
  WA_AUFNR_REL-DISPO, sy-vline,
  WA_AUFNR_REL-PRUEFLOS, sy-vline,
  WA_AUFNR_REL-KEIN_PRLOS, sy-vline,
  WA_AUFNR_REL-FLG_DOC, sy-vline,
  WA_AUFNR_REL-OBJNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AUFNR_REL 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_AUFNR_REL 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_AUFNR_REL INTO WA_AUFNR_REL.


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

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

*Conversion exit ABPSP, internal->external for field PROJN
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_AUFNR_REL-PROJN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AUFNR_REL-PROJN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KDAUF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_AUFNR_REL-KDAUF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AUFNR_REL-KDAUF.
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_AUFNR_REL_STR, 
AUFNR TYPE STRING,
AUFPL TYPE STRING,
RSNUM TYPE STRING,
AUTYP TYPE STRING,
AUART TYPE STRING,
WERKS TYPE STRING,
DISPO TYPE STRING,
PRUEFLOS TYPE STRING,
KEIN_PRLOS TYPE STRING,
FLG_DOC TYPE STRING,
OBJNR TYPE STRING,
PROJN TYPE STRING,
VSNMR TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
ATRKZ TYPE STRING,
SFCPF TYPE STRING,
FEVOR TYPE STRING,
ERROR TYPE STRING,
RELEASD TYPE STRING,
TABIX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AUFNR_REL_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_AUFNR_REL_STR-AUFNR sy-vline 
WA_AUFNR_REL_STR-AUFPL sy-vline 
WA_AUFNR_REL_STR-RSNUM sy-vline 
WA_AUFNR_REL_STR-AUTYP sy-vline 
WA_AUFNR_REL_STR-AUART sy-vline 
WA_AUFNR_REL_STR-WERKS sy-vline 
WA_AUFNR_REL_STR-DISPO sy-vline 
WA_AUFNR_REL_STR-PRUEFLOS sy-vline 
WA_AUFNR_REL_STR-KEIN_PRLOS sy-vline 
WA_AUFNR_REL_STR-FLG_DOC sy-vline 
WA_AUFNR_REL_STR-OBJNR sy-vline 
WA_AUFNR_REL_STR-PROJN sy-vline 
WA_AUFNR_REL_STR-VSNMR sy-vline 
WA_AUFNR_REL_STR-KDAUF sy-vline 
WA_AUFNR_REL_STR-KDPOS sy-vline 
WA_AUFNR_REL_STR-ATRKZ sy-vline 
WA_AUFNR_REL_STR-SFCPF sy-vline 
WA_AUFNR_REL_STR-FEVOR sy-vline 
WA_AUFNR_REL_STR-ERROR sy-vline 
WA_AUFNR_REL_STR-RELEASD sy-vline 
WA_AUFNR_REL_STR-TABIX sy-vline      INTO ld_text SEPARATED BY SPACE.

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