ABAP Select data from SAP table REEX_OBJ_ASSIGN_PS_S into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REEX_OBJ_ASSIGN_PS_S
*  INTO TABLE @DATA(IT_REEX_OBJ_ASSIGN_PS_S2).
*--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_REEX_OBJ_ASSIGN_PS_S INDEX 1 INTO DATA(WA_REEX_OBJ_ASSIGN_PS_S2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REEX_OBJ_ASSIGN_PS_S>-MANDT = 1.
<REEX_OBJ_ASSIGN_PS_S>-OBJNRSRC = 1.
<REEX_OBJ_ASSIGN_PS_S>-OBJASSTYPE = 1.
<REEX_OBJ_ASSIGN_PS_S>-OBJNRTRG = 1.
<REEX_OBJ_ASSIGN_PS_S>-VALIDFROM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REEX_OBJ_ASSIGN_PS_S-VALIDTO, sy-vline,
  WA_REEX_OBJ_ASSIGN_PS_S-ASSIGNONLYINFO, sy-vline,
  WA_REEX_OBJ_ASSIGN_PS_S-OBJNRSRCARCH, sy-vline,
  WA_REEX_OBJ_ASSIGN_PS_S-FLGENTYPE, sy-vline,
  WA_REEX_OBJ_ASSIGN_PS_S-ISMAINASSET, sy-vline,
  WA_REEX_OBJ_ASSIGN_PS_S-MEASVALUE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REEX_OBJ_ASSIGN_PS_S 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_REEX_OBJ_ASSIGN_PS_S 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_REEX_OBJ_ASSIGN_PS_S INTO WA_REEX_OBJ_ASSIGN_PS_S.


*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 REDAT, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_REEX_OBJ_ASSIGN_PS_S-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REEX_OBJ_ASSIGN_PS_S-VALIDTO.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ABPSP, internal->external for field PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_REEX_OBJ_ASSIGN_PS_S-PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REEX_OBJ_ASSIGN_PS_S-PSPNR.
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_REEX_OBJ_ASSIGN_PS_S_STR, 
MANDT TYPE STRING,
OBJNRSRC TYPE STRING,
OBJASSTYPE TYPE STRING,
OBJNRTRG TYPE STRING,
VALIDFROM TYPE STRING,
VALIDTO TYPE STRING,
ASSIGNONLYINFO TYPE STRING,
OBJNRSRCARCH TYPE STRING,
FLGENTYPE TYPE STRING,
ISMAINASSET TYPE STRING,
MEASVALUE TYPE STRING,
MEASUNIT TYPE STRING,
ISMULTIASSGEN TYPE STRING,
POSSDATEFROM TYPE STRING,
POSSDATETO TYPE STRING,
ISDETERMOPTRATE TYPE STRING,
PEPLANNEDDATE TYPE STRING,
PEEFFECTDATE TYPE STRING,
PELOCATION TYPE STRING,
ISLEADINGOBJECT TYPE STRING,
XOBJASSTYPE TYPE STRING,
XOBJTYPESRC TYPE STRING,
XOBJTYPETRG TYPE STRING,
IDENTSRC TYPE STRING,
IDENTTRG TYPE STRING,
IDENTKEYSRC TYPE STRING,
IDENTKEYTRG TYPE STRING,
DESCRIPTIONSRC TYPE STRING,
DESCRIPTIONTRG TYPE STRING,
XLOBJTYPESRC TYPE STRING,
XLOBJTYPETRG TYPE STRING,
HASNOTE TYPE STRING,
RSOBJTYPE TYPE STRING,
XRSOBJTYPE TYPE STRING,
OBJTYPESRC TYPE STRING,
OBJTYPETRG TYPE STRING,
PSPNR TYPE STRING,
POST1 TYPE STRING,
OBJTYPE TYPE STRING,
OBJNR TYPE STRING,
IDENTKEY TYPE STRING,
IDENT TYPE STRING,
XIDENT TYPE STRING,
XOBJTYPE TYPE STRING,
XLOBJTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REEX_OBJ_ASSIGN_PS_S_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_REEX_OBJ_ASSIGN_PS_S_STR-MANDT sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-OBJNRSRC sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-OBJASSTYPE sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-OBJNRTRG sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-VALIDFROM sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-VALIDTO sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-ASSIGNONLYINFO sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-OBJNRSRCARCH sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-FLGENTYPE sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-ISMAINASSET sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-MEASVALUE sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-MEASUNIT sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-ISMULTIASSGEN sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-POSSDATEFROM sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-POSSDATETO sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-ISDETERMOPTRATE sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-PEPLANNEDDATE sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-PEEFFECTDATE sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-PELOCATION sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-ISLEADINGOBJECT sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-XOBJASSTYPE sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-XOBJTYPESRC sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-XOBJTYPETRG sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-IDENTSRC sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-IDENTTRG sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-IDENTKEYSRC sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-IDENTKEYTRG sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-DESCRIPTIONSRC sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-DESCRIPTIONTRG sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-XLOBJTYPESRC sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-XLOBJTYPETRG sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-HASNOTE sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-RSOBJTYPE sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-XRSOBJTYPE sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-OBJTYPESRC sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-OBJTYPETRG sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-PSPNR sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-POST1 sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-OBJTYPE sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-OBJNR sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-IDENTKEY sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-IDENT sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-XIDENT sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-XOBJTYPE sy-vline 
WA_REEX_OBJ_ASSIGN_PS_S_STR-XLOBJTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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