ABAP Select data from SAP table REEX_OBJ_ASSIGN_AM_X 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_AM_X 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_AM_X. 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_AM_X 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_AM_X TYPE STANDARD TABLE OF REEX_OBJ_ASSIGN_AM_X,
      WA_REEX_OBJ_ASSIGN_AM_X TYPE REEX_OBJ_ASSIGN_AM_X,
      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_AM_X> TYPE REEX_OBJ_ASSIGN_AM_X.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REEX_OBJ_ASSIGN_AM_X
*  INTO TABLE @DATA(IT_REEX_OBJ_ASSIGN_AM_X2).
*--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_AM_X INDEX 1 INTO DATA(WA_REEX_OBJ_ASSIGN_AM_X2).


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

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

ENDLOOP.

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

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


*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_AM_X-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REEX_OBJ_ASSIGN_AM_X-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_AM_X-MEASUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REEX_OBJ_ASSIGN_AM_X-MEASUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REEX_OBJ_ASSIGN_AM_X-ANLN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REEX_OBJ_ASSIGN_AM_X-ANLN1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REEX_OBJ_ASSIGN_AM_X-ANLN2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REEX_OBJ_ASSIGN_AM_X-ANLN2.
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_AM_X_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,
BUKRS TYPE STRING,
ANLN1 TYPE STRING,
ANLN2 TYPE STRING,
TXT50 TYPE STRING,
TXA50 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REEX_OBJ_ASSIGN_AM_X_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_AM_X_STR-MANDT sy-vline 
WA_REEX_OBJ_ASSIGN_AM_X_STR-OBJNRSRC sy-vline 
WA_REEX_OBJ_ASSIGN_AM_X_STR-OBJASSTYPE sy-vline 
WA_REEX_OBJ_ASSIGN_AM_X_STR-OBJNRTRG sy-vline 
WA_REEX_OBJ_ASSIGN_AM_X_STR-VALIDFROM sy-vline 
WA_REEX_OBJ_ASSIGN_AM_X_STR-VALIDTO sy-vline 
WA_REEX_OBJ_ASSIGN_AM_X_STR-ASSIGNONLYINFO sy-vline 
WA_REEX_OBJ_ASSIGN_AM_X_STR-OBJNRSRCARCH sy-vline 
WA_REEX_OBJ_ASSIGN_AM_X_STR-FLGENTYPE sy-vline 
WA_REEX_OBJ_ASSIGN_AM_X_STR-ISMAINASSET sy-vline 
WA_REEX_OBJ_ASSIGN_AM_X_STR-MEASVALUE sy-vline 
WA_REEX_OBJ_ASSIGN_AM_X_STR-MEASUNIT sy-vline 
WA_REEX_OBJ_ASSIGN_AM_X_STR-ISMULTIASSGEN sy-vline 
WA_REEX_OBJ_ASSIGN_AM_X_STR-POSSDATEFROM sy-vline 
WA_REEX_OBJ_ASSIGN_AM_X_STR-POSSDATETO sy-vline 
WA_REEX_OBJ_ASSIGN_AM_X_STR-ISDETERMOPTRATE sy-vline 
WA_REEX_OBJ_ASSIGN_AM_X_STR-PEPLANNEDDATE sy-vline 
WA_REEX_OBJ_ASSIGN_AM_X_STR-PEEFFECTDATE sy-vline 
WA_REEX_OBJ_ASSIGN_AM_X_STR-PELOCATION sy-vline 
WA_REEX_OBJ_ASSIGN_AM_X_STR-ISLEADINGOBJECT sy-vline 
WA_REEX_OBJ_ASSIGN_AM_X_STR-BUKRS sy-vline 
WA_REEX_OBJ_ASSIGN_AM_X_STR-ANLN1 sy-vline 
WA_REEX_OBJ_ASSIGN_AM_X_STR-ANLN2 sy-vline 
WA_REEX_OBJ_ASSIGN_AM_X_STR-TXT50 sy-vline 
WA_REEX_OBJ_ASSIGN_AM_X_STR-TXA50 sy-vline      INTO ld_text SEPARATED BY SPACE.

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