ABAP Select data from SAP table IEDEVICEHEADER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IEDEVICEHEADER
*  INTO TABLE @DATA(IT_IEDEVICEHEADER2).
*--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_IEDEVICEHEADER INDEX 1 INTO DATA(WA_IEDEVICEHEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IEDEVICEHEADER>-MANDT = 1.
<IEDEVICEHEADER>-EQUIPMENT = 1.
<IEDEVICEHEADER>-UTILSDEVICEINOUTGROUP = 1.
<IEDEVICEHEADER>-UTILSDEVICEARCRCOMMANDGROUP = 1.
<IEDEVICEHEADER>-UTILSDEVICESAMPLELOT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IEDEVICEHEADER-UTILSDEVICEMEASUREDPRESSURE, sy-vline,
  WA_IEDEVICEHEADER-UTILSDEVICETRANSFORMATIONRATIO, sy-vline,
  WA_IEDEVICEHEADER-UTILSDEVICEINSPRELEVANCECODE, sy-vline,
  WA_IEDEVICEHEADER-UTILSDEVICECERTIFICATIONYEAR, sy-vline,
  WA_IEDEVICEHEADER-UTILSDEVICEADVNCRPLCMTYEAR, sy-vline,
  WA_IEDEVICEHEADER-UTILSDEVICECERTFNSTATUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IEDEVICEHEADER 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_IEDEVICEHEADER 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_IEDEVICEHEADER INTO WA_IEDEVICEHEADER.


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

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

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

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

*Conversion exit ALPHA, internal->external for field UTILSDEVICEINSPPOINTGROUP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IEDEVICEHEADER-UTILSDEVICEINSPPOINTGROUP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEDEVICEHEADER-UTILSDEVICEINSPPOINTGROUP.
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_IEDEVICEHEADER_STR, 
MANDT TYPE STRING,
EQUIPMENT TYPE STRING,
UTILSDEVICEINOUTGROUP TYPE STRING,
UTILSDEVICEARCRCOMMANDGROUP TYPE STRING,
UTILSDEVICESAMPLELOT TYPE STRING,
UTILSDEVICEMEASUREDPRESSURE TYPE STRING,
UTILSDEVICETRANSFORMATIONRATIO TYPE STRING,
UTILSDEVICEINSPRELEVANCECODE TYPE STRING,
UTILSDEVICECERTIFICATIONYEAR TYPE STRING,
UTILSDEVICEADVNCRPLCMTYEAR TYPE STRING,
UTILSDEVICECERTFNSTATUS TYPE STRING,
SAMPLEUTILSDEVICESTATUS TYPE STRING,
UTILSDEVICELASTLEADSEALINGDATE TYPE STRING,
UTILSDEVICECERTFNTYPE TYPE STRING,
UTILSDEVICECERTIFICATIONNUMBER TYPE STRING,
UTILSDEVICEMODIFICATIONDATE TYPE STRING,
UTILSDEVICEMODREASON TYPE STRING,
UTILSDEVICECALIBRNVALDTYISUSED TYPE STRING,
UTILSDEVICEPARAMETRIZATIONCODE TYPE STRING,
UTILSDEVICELEADSEALINGCODE TYPE STRING,
LASTCHANGEDATE TYPE STRING,
UTILSDEVICELASTCHANGEDBYUSER TYPE STRING,
UTILSDEVICEINSPPOINTGROUP TYPE STRING,
INSTDUTILSDEVICEISCERTIFIABLE TYPE STRING,
UTILSDEVICEINSPECTIONNUMBER TYPE STRING,
DVCEINDIVCERTFNVALDTYINYRS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IEDEVICEHEADER_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_IEDEVICEHEADER_STR-MANDT sy-vline 
WA_IEDEVICEHEADER_STR-EQUIPMENT sy-vline 
WA_IEDEVICEHEADER_STR-UTILSDEVICEINOUTGROUP sy-vline 
WA_IEDEVICEHEADER_STR-UTILSDEVICEARCRCOMMANDGROUP sy-vline 
WA_IEDEVICEHEADER_STR-UTILSDEVICESAMPLELOT sy-vline 
WA_IEDEVICEHEADER_STR-UTILSDEVICEMEASUREDPRESSURE sy-vline 
WA_IEDEVICEHEADER_STR-UTILSDEVICETRANSFORMATIONRATIO sy-vline 
WA_IEDEVICEHEADER_STR-UTILSDEVICEINSPRELEVANCECODE sy-vline 
WA_IEDEVICEHEADER_STR-UTILSDEVICECERTIFICATIONYEAR sy-vline 
WA_IEDEVICEHEADER_STR-UTILSDEVICEADVNCRPLCMTYEAR sy-vline 
WA_IEDEVICEHEADER_STR-UTILSDEVICECERTFNSTATUS sy-vline 
WA_IEDEVICEHEADER_STR-SAMPLEUTILSDEVICESTATUS sy-vline 
WA_IEDEVICEHEADER_STR-UTILSDEVICELASTLEADSEALINGDATE sy-vline 
WA_IEDEVICEHEADER_STR-UTILSDEVICECERTFNTYPE sy-vline 
WA_IEDEVICEHEADER_STR-UTILSDEVICECERTIFICATIONNUMBER sy-vline 
WA_IEDEVICEHEADER_STR-UTILSDEVICEMODIFICATIONDATE sy-vline 
WA_IEDEVICEHEADER_STR-UTILSDEVICEMODREASON sy-vline 
WA_IEDEVICEHEADER_STR-UTILSDEVICECALIBRNVALDTYISUSED sy-vline 
WA_IEDEVICEHEADER_STR-UTILSDEVICEPARAMETRIZATIONCODE sy-vline 
WA_IEDEVICEHEADER_STR-UTILSDEVICELEADSEALINGCODE sy-vline 
WA_IEDEVICEHEADER_STR-LASTCHANGEDATE sy-vline 
WA_IEDEVICEHEADER_STR-UTILSDEVICELASTCHANGEDBYUSER sy-vline 
WA_IEDEVICEHEADER_STR-UTILSDEVICEINSPPOINTGROUP sy-vline 
WA_IEDEVICEHEADER_STR-INSTDUTILSDEVICEISCERTIFIABLE sy-vline 
WA_IEDEVICEHEADER_STR-UTILSDEVICEINSPECTIONNUMBER sy-vline 
WA_IEDEVICEHEADER_STR-DVCEINDIVCERTFNVALDTYINYRS sy-vline      INTO ld_text SEPARATED BY SPACE.

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