ABAP Select data from SAP table REEXC_ASSET_CLASS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REEXC_ASSET_CLASS
*  INTO TABLE @DATA(IT_REEXC_ASSET_CLASS2).
*--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_REEXC_ASSET_CLASS INDEX 1 INTO DATA(WA_REEXC_ASSET_CLASS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REEXC_ASSET_CLASS>-MANDT = 1.
<REEXC_ASSET_CLASS>-ANLKL = 1.
<REEXC_ASSET_CLASS>-ERNAM = 1.
<REEXC_ASSET_CLASS>-ERDAT = 1.
<REEXC_ASSET_CLASS>-AENAM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REEXC_ASSET_CLASS-AEDAT, sy-vline,
  WA_REEXC_ASSET_CLASS-XLOEV, sy-vline,
  WA_REEXC_ASSET_CLASS-XSPEA, sy-vline,
  WA_REEXC_ASSET_CLASS-XOPVW, sy-vline,
  WA_REEXC_ASSET_CLASS-NUMKR, sy-vline,
  WA_REEXC_ASSET_CLASS-KTOGR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REEXC_ASSET_CLASS 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_REEXC_ASSET_CLASS 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_REEXC_ASSET_CLASS INTO WA_REEXC_ASSET_CLASS.


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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field LEAFI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REEXC_ASSET_CLASS-LEAFI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REEXC_ASSET_CLASS-LEAFI.
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_REEXC_ASSET_CLASS_STR, 
MANDT TYPE STRING,
ANLKL TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,
XLOEV TYPE STRING,
XSPEA TYPE STRING,
XOPVW TYPE STRING,
NUMKR TYPE STRING,
KTOGR TYPE STRING,
ANKAR TYPE STRING,
FELEI TYPE STRING,
BEGRU TYPE STRING,
ZUAWA TYPE STRING,
GSBER TYPE STRING,
WERKS TYPE STRING,
KOSTL TYPE STRING,
LSTAR TYPE STRING,
ANEQK TYPE STRING,
ANEQS TYPE STRING,
MACKZ TYPE STRING,
LAND1 TYPE STRING,
LIFNR TYPE STRING,
LIEFE TYPE STRING,
ANLUE TYPE STRING,
EIGKZ TYPE STRING,
VMGLI TYPE STRING,
XVRMW TYPE STRING,
INVSL TYPE STRING,
ORD41 TYPE STRING,
ORD42 TYPE STRING,
ORD43 TYPE STRING,
ORD44 TYPE STRING,
IZWEK TYPE STRING,
HERST TYPE STRING,
MEINS TYPE STRING,
FEINS TYPE STRING,
INKEN TYPE STRING,
FIAMT TYPE STRING,
STADT TYPE STRING,
ANLTP TYPE STRING,
XUNTV TYPE STRING,
XAKTIV TYPE STRING,
LEAFI TYPE STRING,
LEJAR TYPE STRING,
LEPER TYPE STRING,
LRYTH TYPE STRING,
LMZIN TYPE STRING,
LEANZ TYPE STRING,
LETXT TYPE STRING,
AIMMO TYPE STRING,
GDLGRP TYPE STRING,
XERWRT TYPE STRING,
XANLGR TYPE STRING,
XINVM TYPE STRING,
LEART TYPE STRING,
ABGSL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REEXC_ASSET_CLASS_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_REEXC_ASSET_CLASS_STR-MANDT sy-vline 
WA_REEXC_ASSET_CLASS_STR-ANLKL sy-vline 
WA_REEXC_ASSET_CLASS_STR-ERNAM sy-vline 
WA_REEXC_ASSET_CLASS_STR-ERDAT sy-vline 
WA_REEXC_ASSET_CLASS_STR-AENAM sy-vline 
WA_REEXC_ASSET_CLASS_STR-AEDAT sy-vline 
WA_REEXC_ASSET_CLASS_STR-XLOEV sy-vline 
WA_REEXC_ASSET_CLASS_STR-XSPEA sy-vline 
WA_REEXC_ASSET_CLASS_STR-XOPVW sy-vline 
WA_REEXC_ASSET_CLASS_STR-NUMKR sy-vline 
WA_REEXC_ASSET_CLASS_STR-KTOGR sy-vline 
WA_REEXC_ASSET_CLASS_STR-ANKAR sy-vline 
WA_REEXC_ASSET_CLASS_STR-FELEI sy-vline 
WA_REEXC_ASSET_CLASS_STR-BEGRU sy-vline 
WA_REEXC_ASSET_CLASS_STR-ZUAWA sy-vline 
WA_REEXC_ASSET_CLASS_STR-GSBER sy-vline 
WA_REEXC_ASSET_CLASS_STR-WERKS sy-vline 
WA_REEXC_ASSET_CLASS_STR-KOSTL sy-vline 
WA_REEXC_ASSET_CLASS_STR-LSTAR sy-vline 
WA_REEXC_ASSET_CLASS_STR-ANEQK sy-vline 
WA_REEXC_ASSET_CLASS_STR-ANEQS sy-vline 
WA_REEXC_ASSET_CLASS_STR-MACKZ sy-vline 
WA_REEXC_ASSET_CLASS_STR-LAND1 sy-vline 
WA_REEXC_ASSET_CLASS_STR-LIFNR sy-vline 
WA_REEXC_ASSET_CLASS_STR-LIEFE sy-vline 
WA_REEXC_ASSET_CLASS_STR-ANLUE sy-vline 
WA_REEXC_ASSET_CLASS_STR-EIGKZ sy-vline 
WA_REEXC_ASSET_CLASS_STR-VMGLI sy-vline 
WA_REEXC_ASSET_CLASS_STR-XVRMW sy-vline 
WA_REEXC_ASSET_CLASS_STR-INVSL sy-vline 
WA_REEXC_ASSET_CLASS_STR-ORD41 sy-vline 
WA_REEXC_ASSET_CLASS_STR-ORD42 sy-vline 
WA_REEXC_ASSET_CLASS_STR-ORD43 sy-vline 
WA_REEXC_ASSET_CLASS_STR-ORD44 sy-vline 
WA_REEXC_ASSET_CLASS_STR-IZWEK sy-vline 
WA_REEXC_ASSET_CLASS_STR-HERST sy-vline 
WA_REEXC_ASSET_CLASS_STR-MEINS sy-vline 
WA_REEXC_ASSET_CLASS_STR-FEINS sy-vline 
WA_REEXC_ASSET_CLASS_STR-INKEN sy-vline 
WA_REEXC_ASSET_CLASS_STR-FIAMT sy-vline 
WA_REEXC_ASSET_CLASS_STR-STADT sy-vline 
WA_REEXC_ASSET_CLASS_STR-ANLTP sy-vline 
WA_REEXC_ASSET_CLASS_STR-XUNTV sy-vline 
WA_REEXC_ASSET_CLASS_STR-XAKTIV sy-vline 
WA_REEXC_ASSET_CLASS_STR-LEAFI sy-vline 
WA_REEXC_ASSET_CLASS_STR-LEJAR sy-vline 
WA_REEXC_ASSET_CLASS_STR-LEPER sy-vline 
WA_REEXC_ASSET_CLASS_STR-LRYTH sy-vline 
WA_REEXC_ASSET_CLASS_STR-LMZIN sy-vline 
WA_REEXC_ASSET_CLASS_STR-LEANZ sy-vline 
WA_REEXC_ASSET_CLASS_STR-LETXT sy-vline 
WA_REEXC_ASSET_CLASS_STR-AIMMO sy-vline 
WA_REEXC_ASSET_CLASS_STR-GDLGRP sy-vline 
WA_REEXC_ASSET_CLASS_STR-XERWRT sy-vline 
WA_REEXC_ASSET_CLASS_STR-XANLGR sy-vline 
WA_REEXC_ASSET_CLASS_STR-XINVM sy-vline 
WA_REEXC_ASSET_CLASS_STR-LEART sy-vline 
WA_REEXC_ASSET_CLASS_STR-ABGSL sy-vline      INTO ld_text SEPARATED BY SPACE.

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