ABAP Select data from SAP table IDFSMAINTORDER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IDFSMAINTORDER
*  INTO TABLE @DATA(IT_IDFSMAINTORDER2).
*--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_IDFSMAINTORDER INDEX 1 INTO DATA(WA_IDFSMAINTORDER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IDFSMAINTORDER>-MANDT = 1.
<IDFSMAINTORDER>-MAINTENANCEORDER = 1.
<IDFSMAINTORDER>-EQUIPMENT = 1.
<IDFSMAINTORDER>-EQUIPMENTNAME = 1.
<IDFSMAINTORDER>-DFSMAINTFUNCTIONALLOCATION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IDFSMAINTORDER-FUNCTIONALLOCATIONNAME, sy-vline,
  WA_IDFSMAINTORDER-MAINTENANCEORDERDESC, sy-vline,
  WA_IDFSMAINTORDER-MAINTORDBASICENDDATE, sy-vline,
  WA_IDFSMAINTORDER-MAINTORDBASICENDTIME, sy-vline,
  WA_IDFSMAINTORDER-MAINTORDBASICSTARTDATE, sy-vline,
  WA_IDFSMAINTORDER-MAINTORDBASICSTARTTIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IDFSMAINTORDER 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_IDFSMAINTORDER 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_IDFSMAINTORDER INTO WA_IDFSMAINTORDER.


*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_IDFSMAINTORDER-MAINTENANCEORDER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDFSMAINTORDER-MAINTENANCEORDER.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit TPLNR, internal->external for field DFSMAINTFUNCTIONALLOCATION
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_IDFSMAINTORDER-DFSMAINTFUNCTIONALLOCATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDFSMAINTORDER-DFSMAINTFUNCTIONALLOCATION.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_IDFSMAINTORDER-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDFSMAINTORDER-MATERIAL.
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_IDFSMAINTORDER_STR, 
MANDT TYPE STRING,
MAINTENANCEORDER TYPE STRING,
EQUIPMENT TYPE STRING,
EQUIPMENTNAME TYPE STRING,
DFSMAINTFUNCTIONALLOCATION TYPE STRING,
FUNCTIONALLOCATIONNAME TYPE STRING,
MAINTENANCEORDERDESC TYPE STRING,
MAINTORDBASICENDDATE TYPE STRING,
MAINTORDBASICENDTIME TYPE STRING,
MAINTORDBASICSTARTDATE TYPE STRING,
MAINTORDBASICSTARTTIME TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATE TYPE STRING,
DFSMAINTORDEROBJECTNMBR TYPE STRING,
MAINTENANCEORDERINTERNALID TYPE STRING,
MAINTENANCEORDERTYPE TYPE STRING,
MAINWORKCENTER TYPE STRING,
MAINWORKCENTERPLANT TYPE STRING,
WORKCENTERTEXT TYPE STRING,
PLANT TYPE STRING,
MAINTENANCEPROCESSINGPHASE TYPE STRING,
MAINTPRIORITY TYPE STRING,
MAINTPRIORITYDESC TYPE STRING,
MATERIAL TYPE STRING,
MATERIALNAME TYPE STRING,
MAINTENANCEPLANNERGROUP TYPE STRING,
MAINTENANCEPLANNERGROUPNAME TYPE STRING,
MAINTENANCEACTIVITYTYPE TYPE STRING,
DFSMAINTORDTECHSTSSHORTNAME TYPE STRING,
DFSMAINTORDTECHSTSLONGNAME TYPE STRING,
DFSMAINTORDTECHSTATUSPROFILE TYPE STRING,
DFSMAINTEXPLOSIONTYPE TYPE STRING,
DFSMAINTEQUIPMENTUTILIZERID TYPE STRING,
DFSMAINTORDERUSERSTSSHORTNAME TYPE STRING,
DFSMAINTORDERSYSTSTSSHORTNAME TYPE STRING,
DFSMAINTTECHSTSICONURL TYPE STRING,
TECHOBJECTWITHLEADINGZEROS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IDFSMAINTORDER_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_IDFSMAINTORDER_STR-MANDT sy-vline 
WA_IDFSMAINTORDER_STR-MAINTENANCEORDER sy-vline 
WA_IDFSMAINTORDER_STR-EQUIPMENT sy-vline 
WA_IDFSMAINTORDER_STR-EQUIPMENTNAME sy-vline 
WA_IDFSMAINTORDER_STR-DFSMAINTFUNCTIONALLOCATION sy-vline 
WA_IDFSMAINTORDER_STR-FUNCTIONALLOCATIONNAME sy-vline 
WA_IDFSMAINTORDER_STR-MAINTENANCEORDERDESC sy-vline 
WA_IDFSMAINTORDER_STR-MAINTORDBASICENDDATE sy-vline 
WA_IDFSMAINTORDER_STR-MAINTORDBASICENDTIME sy-vline 
WA_IDFSMAINTORDER_STR-MAINTORDBASICSTARTDATE sy-vline 
WA_IDFSMAINTORDER_STR-MAINTORDBASICSTARTTIME sy-vline 
WA_IDFSMAINTORDER_STR-CREATEDBYUSER sy-vline 
WA_IDFSMAINTORDER_STR-CREATIONDATE sy-vline 
WA_IDFSMAINTORDER_STR-DFSMAINTORDEROBJECTNMBR sy-vline 
WA_IDFSMAINTORDER_STR-MAINTENANCEORDERINTERNALID sy-vline 
WA_IDFSMAINTORDER_STR-MAINTENANCEORDERTYPE sy-vline 
WA_IDFSMAINTORDER_STR-MAINWORKCENTER sy-vline 
WA_IDFSMAINTORDER_STR-MAINWORKCENTERPLANT sy-vline 
WA_IDFSMAINTORDER_STR-WORKCENTERTEXT sy-vline 
WA_IDFSMAINTORDER_STR-PLANT sy-vline 
WA_IDFSMAINTORDER_STR-MAINTENANCEPROCESSINGPHASE sy-vline 
WA_IDFSMAINTORDER_STR-MAINTPRIORITY sy-vline 
WA_IDFSMAINTORDER_STR-MAINTPRIORITYDESC sy-vline 
WA_IDFSMAINTORDER_STR-MATERIAL sy-vline 
WA_IDFSMAINTORDER_STR-MATERIALNAME sy-vline 
WA_IDFSMAINTORDER_STR-MAINTENANCEPLANNERGROUP sy-vline 
WA_IDFSMAINTORDER_STR-MAINTENANCEPLANNERGROUPNAME sy-vline 
WA_IDFSMAINTORDER_STR-MAINTENANCEACTIVITYTYPE sy-vline 
WA_IDFSMAINTORDER_STR-DFSMAINTORDTECHSTSSHORTNAME sy-vline 
WA_IDFSMAINTORDER_STR-DFSMAINTORDTECHSTSLONGNAME sy-vline 
WA_IDFSMAINTORDER_STR-DFSMAINTORDTECHSTATUSPROFILE sy-vline 
WA_IDFSMAINTORDER_STR-DFSMAINTEXPLOSIONTYPE sy-vline 
WA_IDFSMAINTORDER_STR-DFSMAINTEQUIPMENTUTILIZERID sy-vline 
WA_IDFSMAINTORDER_STR-DFSMAINTORDERUSERSTSSHORTNAME sy-vline 
WA_IDFSMAINTORDER_STR-DFSMAINTORDERSYSTSTSSHORTNAME sy-vline 
WA_IDFSMAINTORDER_STR-DFSMAINTTECHSTSICONURL sy-vline 
WA_IDFSMAINTORDER_STR-TECHOBJECTWITHLEADINGZEROS sy-vline      INTO ld_text SEPARATED BY SPACE.

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