ABAP Select data from SAP table IDFSREVSTRUC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IDFSREVSTRUC
*  INTO TABLE @DATA(IT_IDFSREVSTRUC2).
*--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_IDFSREVSTRUC INDEX 1 INTO DATA(WA_IDFSREVSTRUC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IDFSREVSTRUC>-MANDT = 1.
<IDFSREVSTRUC>-EQUIPMENT = 1.
<IDFSREVSTRUC>-MAINTENANCEREVISION = 1.
<IDFSREVSTRUC>-MAINTENANCEPLANNINGPLANT = 1.
<IDFSREVSTRUC>-MAINTENANCEREVISIONDESC = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IDFSREVSTRUC-REVISIONSTARTDATE, sy-vline,
  WA_IDFSREVSTRUC-REVISIONSTARTTIME, sy-vline,
  WA_IDFSREVSTRUC-REVISIONENDDATE, sy-vline,
  WA_IDFSREVSTRUC-REVISIONENDTIME, sy-vline,
  WA_IDFSREVSTRUC-DFSMAINTREVISIONTYPE, sy-vline,
  WA_IDFSREVSTRUC-DFSMAINTREVISIONOBJECTNUMBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IDFSREVSTRUC 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_IDFSREVSTRUC 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_IDFSREVSTRUC INTO WA_IDFSREVSTRUC.


*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 EQUIPMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IDFSREVSTRUC-EQUIPMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDFSREVSTRUC-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_IDFSREVSTRUC_STR, 
MANDT TYPE STRING,
EQUIPMENT TYPE STRING,
MAINTENANCEREVISION TYPE STRING,
MAINTENANCEPLANNINGPLANT TYPE STRING,
MAINTENANCEREVISIONDESC TYPE STRING,
REVISIONSTARTDATE TYPE STRING,
REVISIONSTARTTIME TYPE STRING,
REVISIONENDDATE TYPE STRING,
REVISIONENDTIME TYPE STRING,
DFSMAINTREVISIONTYPE TYPE STRING,
DFSMAINTREVISIONOBJECTNUMBER TYPE STRING,
DFSMAINTFUNCTIONALLOCATION TYPE STRING,
DFSMAINTREVISIONWORKCENTER TYPE STRING,
DFSMAINTREVISIONPLANT TYPE STRING,
DFSMAINTREVISIONSYSTSTSNAME TYPE STRING,
DFSMAINTREVISIONUSRSTSSHRTNAME TYPE STRING,
DFSMAINTEXPLOSIONTYPE TYPE STRING,
DFSMAINTEQUIPMENTUTILIZERID TYPE STRING,
DFSMAINTREVISIONWBSELEMENT TYPE STRING,
EQUIPMENTNAME TYPE STRING,
FUNCTIONALLOCATIONNAME TYPE STRING,
WBSDESCRIPTION TYPE STRING,
TECHOBJECTWITHLEADINGZEROS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IDFSREVSTRUC_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_IDFSREVSTRUC_STR-MANDT sy-vline 
WA_IDFSREVSTRUC_STR-EQUIPMENT sy-vline 
WA_IDFSREVSTRUC_STR-MAINTENANCEREVISION sy-vline 
WA_IDFSREVSTRUC_STR-MAINTENANCEPLANNINGPLANT sy-vline 
WA_IDFSREVSTRUC_STR-MAINTENANCEREVISIONDESC sy-vline 
WA_IDFSREVSTRUC_STR-REVISIONSTARTDATE sy-vline 
WA_IDFSREVSTRUC_STR-REVISIONSTARTTIME sy-vline 
WA_IDFSREVSTRUC_STR-REVISIONENDDATE sy-vline 
WA_IDFSREVSTRUC_STR-REVISIONENDTIME sy-vline 
WA_IDFSREVSTRUC_STR-DFSMAINTREVISIONTYPE sy-vline 
WA_IDFSREVSTRUC_STR-DFSMAINTREVISIONOBJECTNUMBER sy-vline 
WA_IDFSREVSTRUC_STR-DFSMAINTFUNCTIONALLOCATION sy-vline 
WA_IDFSREVSTRUC_STR-DFSMAINTREVISIONWORKCENTER sy-vline 
WA_IDFSREVSTRUC_STR-DFSMAINTREVISIONPLANT sy-vline 
WA_IDFSREVSTRUC_STR-DFSMAINTREVISIONSYSTSTSNAME sy-vline 
WA_IDFSREVSTRUC_STR-DFSMAINTREVISIONUSRSTSSHRTNAME sy-vline 
WA_IDFSREVSTRUC_STR-DFSMAINTEXPLOSIONTYPE sy-vline 
WA_IDFSREVSTRUC_STR-DFSMAINTEQUIPMENTUTILIZERID sy-vline 
WA_IDFSREVSTRUC_STR-DFSMAINTREVISIONWBSELEMENT sy-vline 
WA_IDFSREVSTRUC_STR-EQUIPMENTNAME sy-vline 
WA_IDFSREVSTRUC_STR-FUNCTIONALLOCATIONNAME sy-vline 
WA_IDFSREVSTRUC_STR-WBSDESCRIPTION sy-vline 
WA_IDFSREVSTRUC_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.