ABAP Select data from SAP table REIS_AO_OA_L into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REIS_AO_OA_L
*  INTO TABLE @DATA(IT_REIS_AO_OA_L2).
*--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_REIS_AO_OA_L INDEX 1 INTO DATA(WA_REIS_AO_OA_L2).


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

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

ENDLOOP.

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

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


*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_REIS_AO_OA_L-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REIS_AO_OA_L-VALIDTO.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field AOFUNCTION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REIS_AO_OA_L-AOFUNCTION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REIS_AO_OA_L-AOFUNCTION.
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_REIS_AO_OA_L_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,
RECISVALIDFROM TYPE STRING,
RECISVALIDTO TYPE STRING,
AOFUNCTION TYPE STRING,
XMAOFUNCTION TYPE STRING,
AOTYPE TYPE STRING,
XMAOTYPE TYPE STRING,
PARTAOID0101 TYPE STRING,
PARTAOID0201 TYPE STRING,
PARTAOID0301 TYPE STRING,
PARTAOID0401 TYPE STRING,
PARTAOID0501 TYPE STRING,
PARTAOID0601 TYPE STRING,
PARTAOID0701 TYPE STRING,
PARTAOID0801 TYPE STRING,
PARTAOID0901 TYPE STRING,
PARTAOID1001 TYPE STRING,
AOID TYPE STRING,
GEN_OBJNR TYPE STRING,
GEN_OBJTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REIS_AO_OA_L_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_REIS_AO_OA_L_STR-MANDT sy-vline 
WA_REIS_AO_OA_L_STR-OBJNRSRC sy-vline 
WA_REIS_AO_OA_L_STR-OBJASSTYPE sy-vline 
WA_REIS_AO_OA_L_STR-OBJNRTRG sy-vline 
WA_REIS_AO_OA_L_STR-VALIDFROM sy-vline 
WA_REIS_AO_OA_L_STR-VALIDTO sy-vline 
WA_REIS_AO_OA_L_STR-ASSIGNONLYINFO sy-vline 
WA_REIS_AO_OA_L_STR-OBJNRSRCARCH sy-vline 
WA_REIS_AO_OA_L_STR-FLGENTYPE sy-vline 
WA_REIS_AO_OA_L_STR-ISMAINASSET sy-vline 
WA_REIS_AO_OA_L_STR-MEASVALUE sy-vline 
WA_REIS_AO_OA_L_STR-MEASUNIT sy-vline 
WA_REIS_AO_OA_L_STR-ISMULTIASSGEN sy-vline 
WA_REIS_AO_OA_L_STR-POSSDATEFROM sy-vline 
WA_REIS_AO_OA_L_STR-POSSDATETO sy-vline 
WA_REIS_AO_OA_L_STR-ISDETERMOPTRATE sy-vline 
WA_REIS_AO_OA_L_STR-PEPLANNEDDATE sy-vline 
WA_REIS_AO_OA_L_STR-PEEFFECTDATE sy-vline 
WA_REIS_AO_OA_L_STR-PELOCATION sy-vline 
WA_REIS_AO_OA_L_STR-ISLEADINGOBJECT sy-vline 
WA_REIS_AO_OA_L_STR-XOBJASSTYPE sy-vline 
WA_REIS_AO_OA_L_STR-XOBJTYPESRC sy-vline 
WA_REIS_AO_OA_L_STR-XOBJTYPETRG sy-vline 
WA_REIS_AO_OA_L_STR-IDENTSRC sy-vline 
WA_REIS_AO_OA_L_STR-IDENTTRG sy-vline 
WA_REIS_AO_OA_L_STR-IDENTKEYSRC sy-vline 
WA_REIS_AO_OA_L_STR-IDENTKEYTRG sy-vline 
WA_REIS_AO_OA_L_STR-DESCRIPTIONSRC sy-vline 
WA_REIS_AO_OA_L_STR-DESCRIPTIONTRG sy-vline 
WA_REIS_AO_OA_L_STR-XLOBJTYPESRC sy-vline 
WA_REIS_AO_OA_L_STR-XLOBJTYPETRG sy-vline 
WA_REIS_AO_OA_L_STR-HASNOTE sy-vline 
WA_REIS_AO_OA_L_STR-RSOBJTYPE sy-vline 
WA_REIS_AO_OA_L_STR-XRSOBJTYPE sy-vline 
WA_REIS_AO_OA_L_STR-OBJTYPESRC sy-vline 
WA_REIS_AO_OA_L_STR-OBJTYPETRG sy-vline 
WA_REIS_AO_OA_L_STR-RECISVALIDFROM sy-vline 
WA_REIS_AO_OA_L_STR-RECISVALIDTO sy-vline 
WA_REIS_AO_OA_L_STR-AOFUNCTION sy-vline 
WA_REIS_AO_OA_L_STR-XMAOFUNCTION sy-vline 
WA_REIS_AO_OA_L_STR-AOTYPE sy-vline 
WA_REIS_AO_OA_L_STR-XMAOTYPE sy-vline 
WA_REIS_AO_OA_L_STR-PARTAOID0101 sy-vline 
WA_REIS_AO_OA_L_STR-PARTAOID0201 sy-vline 
WA_REIS_AO_OA_L_STR-PARTAOID0301 sy-vline 
WA_REIS_AO_OA_L_STR-PARTAOID0401 sy-vline 
WA_REIS_AO_OA_L_STR-PARTAOID0501 sy-vline 
WA_REIS_AO_OA_L_STR-PARTAOID0601 sy-vline 
WA_REIS_AO_OA_L_STR-PARTAOID0701 sy-vline 
WA_REIS_AO_OA_L_STR-PARTAOID0801 sy-vline 
WA_REIS_AO_OA_L_STR-PARTAOID0901 sy-vline 
WA_REIS_AO_OA_L_STR-PARTAOID1001 sy-vline 
WA_REIS_AO_OA_L_STR-AOID sy-vline 
WA_REIS_AO_OA_L_STR-GEN_OBJNR sy-vline 
WA_REIS_AO_OA_L_STR-GEN_OBJTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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