ABAP Select data from SAP table IEDEVICEHISTORY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IEDEVICEHISTORY
*  INTO TABLE @DATA(IT_IEDEVICEHISTORY2).
*--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_IEDEVICEHISTORY INDEX 1 INTO DATA(WA_IEDEVICEHISTORY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IEDEVICEHISTORY>-MANDT = 1.
<IEDEVICEHISTORY>-EQUIPMENT = 1.
<IEDEVICEHISTORY>-UTILSDEVICEVALIDITYENDDATE = 1.
<IEDEVICEHISTORY>-UTILSDEVICEACTIVITYREASON = 1.
<IEDEVICEHISTORY>-UTILSDEVICEVALIDITYSTARTDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IEDEVICEHISTORY-UTILSDEVICEBSCCATCOMBINATION, sy-vline,
  WA_IEDEVICEHISTORY-UTILITIESLOGICALDEVICENUMBER, sy-vline,
  WA_IEDEVICEHISTORY-UTILITIESREGISTERGROUP, sy-vline,
  WA_IEDEVICEHISTORY-UTILSDEVICEINSTALLATIONDATE, sy-vline,
  WA_IEDEVICEHISTORY-UTILSDEVICEREMOVALDATE, sy-vline,
  WA_IEDEVICEHISTORY-UTILSDEVICELOCATION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IEDEVICEHISTORY 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_IEDEVICEHISTORY 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_IEDEVICEHISTORY INTO WA_IEDEVICEHISTORY.


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

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

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

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

*Conversion exit ALPHA, internal->external for field UTILSDEVICEWINDINGGROUP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IEDEVICEHISTORY-UTILSDEVICEWINDINGGROUP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEDEVICEHISTORY-UTILSDEVICEWINDINGGROUP.
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_IEDEVICEHISTORY_STR, 
MANDT TYPE STRING,
EQUIPMENT TYPE STRING,
UTILSDEVICEVALIDITYENDDATE TYPE STRING,
UTILSDEVICEACTIVITYREASON TYPE STRING,
UTILSDEVICEVALIDITYSTARTDATE TYPE STRING,
UTILSDEVICEBSCCATCOMBINATION TYPE STRING,
UTILITIESLOGICALDEVICENUMBER TYPE STRING,
UTILITIESREGISTERGROUP TYPE STRING,
UTILSDEVICEINSTALLATIONDATE TYPE STRING,
UTILSDEVICEREMOVALDATE TYPE STRING,
UTILSDEVICELOCATION TYPE STRING,
UTILSDEVICEGROUP TYPE STRING,
UTILSDEVICEWINDINGGROUP TYPE STRING,
UTILITIESPREPAYMENTMETERTYPE TYPE STRING,
UTILSDEVICELOSSDETNGROUP TYPE STRING,
DVCEPWRTRNSFRMTRTRNSFRATINGVAL TYPE STRING,
DVCEPWRTRNSFRMTRPRIMVOLTVAL TYPE STRING,
DVCEPWRTRNSFRMTRSECDRYVOLTVAL TYPE STRING,
ADVANCEDMETERINGSYSTEM TYPE STRING,
ADVANCEDMETERCAPABILITYGROUP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IEDEVICEHISTORY_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_IEDEVICEHISTORY_STR-MANDT sy-vline 
WA_IEDEVICEHISTORY_STR-EQUIPMENT sy-vline 
WA_IEDEVICEHISTORY_STR-UTILSDEVICEVALIDITYENDDATE sy-vline 
WA_IEDEVICEHISTORY_STR-UTILSDEVICEACTIVITYREASON sy-vline 
WA_IEDEVICEHISTORY_STR-UTILSDEVICEVALIDITYSTARTDATE sy-vline 
WA_IEDEVICEHISTORY_STR-UTILSDEVICEBSCCATCOMBINATION sy-vline 
WA_IEDEVICEHISTORY_STR-UTILITIESLOGICALDEVICENUMBER sy-vline 
WA_IEDEVICEHISTORY_STR-UTILITIESREGISTERGROUP sy-vline 
WA_IEDEVICEHISTORY_STR-UTILSDEVICEINSTALLATIONDATE sy-vline 
WA_IEDEVICEHISTORY_STR-UTILSDEVICEREMOVALDATE sy-vline 
WA_IEDEVICEHISTORY_STR-UTILSDEVICELOCATION sy-vline 
WA_IEDEVICEHISTORY_STR-UTILSDEVICEGROUP sy-vline 
WA_IEDEVICEHISTORY_STR-UTILSDEVICEWINDINGGROUP sy-vline 
WA_IEDEVICEHISTORY_STR-UTILITIESPREPAYMENTMETERTYPE sy-vline 
WA_IEDEVICEHISTORY_STR-UTILSDEVICELOSSDETNGROUP sy-vline 
WA_IEDEVICEHISTORY_STR-DVCEPWRTRNSFRMTRTRNSFRATINGVAL sy-vline 
WA_IEDEVICEHISTORY_STR-DVCEPWRTRNSFRMTRPRIMVOLTVAL sy-vline 
WA_IEDEVICEHISTORY_STR-DVCEPWRTRNSFRMTRSECDRYVOLTVAL sy-vline 
WA_IEDEVICEHISTORY_STR-ADVANCEDMETERINGSYSTEM sy-vline 
WA_IEDEVICEHISTORY_STR-ADVANCEDMETERCAPABILITYGROUP sy-vline      INTO ld_text SEPARATED BY SPACE.

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