ABAP Select data from SAP table IOPENMAINTORDER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IOPENMAINTORDER
*  INTO TABLE @DATA(IT_IOPENMAINTORDER2).
*--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_IOPENMAINTORDER INDEX 1 INTO DATA(WA_IOPENMAINTORDER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IOPENMAINTORDER>-MANDT = 1.
<IOPENMAINTORDER>-MAINTENANCEORDER = 1.
<IOPENMAINTORDER>-TECHNICALOBJECT = 1.
<IOPENMAINTORDER>-TECHOBJISEQUIPORFUNCNLLOC = 1.
<IOPENMAINTORDER>-MAINTENANCEPROCESSINGPHASE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IOPENMAINTORDER-MAINTENANCEORDERDESC, sy-vline,
  WA_IOPENMAINTORDER-MAINTENANCEORDERTYPE, sy-vline,
  WA_IOPENMAINTORDER-MAINTENANCEORDERTYPENAME, sy-vline,
  WA_IOPENMAINTORDER-MAINTENANCEPLANNINGPLANT, sy-vline,
  WA_IOPENMAINTORDER-MAINTENANCEPLANNERGROUP, sy-vline,
  WA_IOPENMAINTORDER-LATESTACCEPTABLECOMPLETIONDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IOPENMAINTORDER 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_IOPENMAINTORDER 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_IOPENMAINTORDER INTO WA_IOPENMAINTORDER.


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

*Conversion exit ALPHA, internal->external for field EQUIPMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IOPENMAINTORDER-EQUIPMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IOPENMAINTORDER-EQUIPMENT.
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_IOPENMAINTORDER_STR, 
MANDT TYPE STRING,
MAINTENANCEORDER TYPE STRING,
TECHNICALOBJECT TYPE STRING,
TECHOBJISEQUIPORFUNCNLLOC TYPE STRING,
MAINTENANCEPROCESSINGPHASE TYPE STRING,
MAINTENANCEORDERDESC TYPE STRING,
MAINTENANCEORDERTYPE TYPE STRING,
MAINTENANCEORDERTYPENAME TYPE STRING,
MAINTENANCEPLANNINGPLANT TYPE STRING,
MAINTENANCEPLANNERGROUP TYPE STRING,
LATESTACCEPTABLECOMPLETIONDATE TYPE STRING,
MAINTORDBASICSTARTDATE TYPE STRING,
MAINTORDBASICENDDATE TYPE STRING,
MAINTENANCEORDERINTERNALID TYPE STRING,
EQUIPMENT TYPE STRING,
MAINTOBJECTLOCACCTASSGMTNMBR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IOPENMAINTORDER_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_IOPENMAINTORDER_STR-MANDT sy-vline 
WA_IOPENMAINTORDER_STR-MAINTENANCEORDER sy-vline 
WA_IOPENMAINTORDER_STR-TECHNICALOBJECT sy-vline 
WA_IOPENMAINTORDER_STR-TECHOBJISEQUIPORFUNCNLLOC sy-vline 
WA_IOPENMAINTORDER_STR-MAINTENANCEPROCESSINGPHASE sy-vline 
WA_IOPENMAINTORDER_STR-MAINTENANCEORDERDESC sy-vline 
WA_IOPENMAINTORDER_STR-MAINTENANCEORDERTYPE sy-vline 
WA_IOPENMAINTORDER_STR-MAINTENANCEORDERTYPENAME sy-vline 
WA_IOPENMAINTORDER_STR-MAINTENANCEPLANNINGPLANT sy-vline 
WA_IOPENMAINTORDER_STR-MAINTENANCEPLANNERGROUP sy-vline 
WA_IOPENMAINTORDER_STR-LATESTACCEPTABLECOMPLETIONDATE sy-vline 
WA_IOPENMAINTORDER_STR-MAINTORDBASICSTARTDATE sy-vline 
WA_IOPENMAINTORDER_STR-MAINTORDBASICENDDATE sy-vline 
WA_IOPENMAINTORDER_STR-MAINTENANCEORDERINTERNALID sy-vline 
WA_IOPENMAINTORDER_STR-EQUIPMENT sy-vline 
WA_IOPENMAINTORDER_STR-MAINTOBJECTLOCACCTASSGMTNMBR sy-vline      INTO ld_text SEPARATED BY SPACE.

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