ABAP Select data from SAP table IDFSMSMTDOCSTRUC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IDFSMSMTDOCSTRUC
*  INTO TABLE @DATA(IT_IDFSMSMTDOCSTRUC2).
*--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_IDFSMSMTDOCSTRUC INDEX 1 INTO DATA(WA_IDFSMSMTDOCSTRUC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IDFSMSMTDOCSTRUC>-MANDT = 1.
<IDFSMSMTDOCSTRUC>-EQUIPMENT = 1.
<IDFSMSMTDOCSTRUC>-MEASUREMENTDOCUMENT = 1.
<IDFSMSMTDOCSTRUC>-DFSMAINTFUNCTIONALLOCATION = 1.
<IDFSMSMTDOCSTRUC>-MEASURINGPOINT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IDFSMSMTDOCSTRUC-MSMTRDNGDATE, sy-vline,
  WA_IDFSMSMTDOCSTRUC-MSMTRDNGTIME, sy-vline,
  WA_IDFSMSMTDOCSTRUC-CHARACTERISTIC, sy-vline,
  WA_IDFSMSMTDOCSTRUC-CHARCDESCRIPTION, sy-vline,
  WA_IDFSMSMTDOCSTRUC-EQUIPMENTNAME, sy-vline,
  WA_IDFSMSMTDOCSTRUC-FUNCTIONALLOCATIONNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IDFSMSMTDOCSTRUC 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_IDFSMSMTDOCSTRUC 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_IDFSMSMTDOCSTRUC INTO WA_IDFSMSMTDOCSTRUC.


*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_IDFSMSMTDOCSTRUC-EQUIPMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDFSMSMTDOCSTRUC-EQUIPMENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEASUREMENTRANGEUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IDFSMSMTDOCSTRUC-MEASUREMENTRANGEUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDFSMSMTDOCSTRUC-MEASUREMENTRANGEUNIT.
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_IDFSMSMTDOCSTRUC_STR, 
MANDT TYPE STRING,
EQUIPMENT TYPE STRING,
MEASUREMENTDOCUMENT TYPE STRING,
DFSMAINTFUNCTIONALLOCATION TYPE STRING,
MEASURINGPOINT TYPE STRING,
MSMTRDNGDATE TYPE STRING,
MSMTRDNGTIME TYPE STRING,
CHARACTERISTIC TYPE STRING,
CHARCDESCRIPTION TYPE STRING,
EQUIPMENTNAME TYPE STRING,
FUNCTIONALLOCATIONNAME TYPE STRING,
MEASURINGPOINTDESCRIPTION TYPE STRING,
MSMTCOUNTERREADINGDIFFERENCE TYPE STRING,
MEASUREMENTCOUNTERREADING TYPE STRING,
MEASUREMENTREADING TYPE STRING,
MEASUREMENTDOCUMENTTEXT TYPE STRING,
MSMTVALUATIONCODE TYPE STRING,
MEASUREMENTRANGEUNIT TYPE STRING,
MEASUREMENTREADINGINENTRYUOM TYPE STRING,
DFSMAINTEXPLOSIONTYPE TYPE STRING,
DFSMAINTEQUIPMENTUTILIZERID TYPE STRING,
UNITOFMEASURETECHNICALNAME TYPE STRING,
TECHOBJECTWITHLEADINGZEROS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IDFSMSMTDOCSTRUC_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_IDFSMSMTDOCSTRUC_STR-MANDT sy-vline 
WA_IDFSMSMTDOCSTRUC_STR-EQUIPMENT sy-vline 
WA_IDFSMSMTDOCSTRUC_STR-MEASUREMENTDOCUMENT sy-vline 
WA_IDFSMSMTDOCSTRUC_STR-DFSMAINTFUNCTIONALLOCATION sy-vline 
WA_IDFSMSMTDOCSTRUC_STR-MEASURINGPOINT sy-vline 
WA_IDFSMSMTDOCSTRUC_STR-MSMTRDNGDATE sy-vline 
WA_IDFSMSMTDOCSTRUC_STR-MSMTRDNGTIME sy-vline 
WA_IDFSMSMTDOCSTRUC_STR-CHARACTERISTIC sy-vline 
WA_IDFSMSMTDOCSTRUC_STR-CHARCDESCRIPTION sy-vline 
WA_IDFSMSMTDOCSTRUC_STR-EQUIPMENTNAME sy-vline 
WA_IDFSMSMTDOCSTRUC_STR-FUNCTIONALLOCATIONNAME sy-vline 
WA_IDFSMSMTDOCSTRUC_STR-MEASURINGPOINTDESCRIPTION sy-vline 
WA_IDFSMSMTDOCSTRUC_STR-MSMTCOUNTERREADINGDIFFERENCE sy-vline 
WA_IDFSMSMTDOCSTRUC_STR-MEASUREMENTCOUNTERREADING sy-vline 
WA_IDFSMSMTDOCSTRUC_STR-MEASUREMENTREADING sy-vline 
WA_IDFSMSMTDOCSTRUC_STR-MEASUREMENTDOCUMENTTEXT sy-vline 
WA_IDFSMSMTDOCSTRUC_STR-MSMTVALUATIONCODE sy-vline 
WA_IDFSMSMTDOCSTRUC_STR-MEASUREMENTRANGEUNIT sy-vline 
WA_IDFSMSMTDOCSTRUC_STR-MEASUREMENTREADINGINENTRYUOM sy-vline 
WA_IDFSMSMTDOCSTRUC_STR-DFSMAINTEXPLOSIONTYPE sy-vline 
WA_IDFSMSMTDOCSTRUC_STR-DFSMAINTEQUIPMENTUTILIZERID sy-vline 
WA_IDFSMSMTDOCSTRUC_STR-UNITOFMEASURETECHNICALNAME sy-vline 
WA_IDFSMSMTDOCSTRUC_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.