ABAP Select data from SAP table IMPSTRUCTELEMT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IMPSTRUCTELEMT
*  INTO TABLE @DATA(IT_IMPSTRUCTELEMT2).
*--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_IMPSTRUCTELEMT INDEX 1 INTO DATA(WA_IMPSTRUCTELEMT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IMPSTRUCTELEMT>-MANDT = 1.
<IMPSTRUCTELEMT>-CONTROLLINGOBJECTEXTERNALID = 1.
<IMPSTRUCTELEMT>-MASTERPROJECT = 1.
<IMPSTRUCTELEMT>-MASTERPROJECTUUID = 1.
<IMPSTRUCTELEMT>-MASTERPROJECTNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IMPSTRUCTELEMT-MASTERPROJECTTYPE, sy-vline,
  WA_IMPSTRUCTELEMT-MASTERPROJECTISCONFIDENTIAL, sy-vline,
  WA_IMPSTRUCTELEMT-MASTERPROJECTORGANIZATION, sy-vline,
  WA_IMPSTRUCTELEMT-CONTROLLINGOBJECTDESCRIPTION, sy-vline,
  WA_IMPSTRUCTELEMT-CONTROLLINGOBJECT, sy-vline,
  WA_IMPSTRUCTELEMT-CONTROLLINGOBJECTTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IMPSTRUCTELEMT 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_IMPSTRUCTELEMT 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_IMPSTRUCTELEMT INTO WA_IMPSTRUCTELEMT.


*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 SALESDOCUMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IMPSTRUCTELEMT-SALESDOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMPSTRUCTELEMT-SALESDOCUMENT.
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_IMPSTRUCTELEMT_STR, 
MANDT TYPE STRING,
CONTROLLINGOBJECTEXTERNALID TYPE STRING,
MASTERPROJECT TYPE STRING,
MASTERPROJECTUUID TYPE STRING,
MASTERPROJECTNAME TYPE STRING,
MASTERPROJECTTYPE TYPE STRING,
MASTERPROJECTISCONFIDENTIAL TYPE STRING,
MASTERPROJECTORGANIZATION TYPE STRING,
CONTROLLINGOBJECTDESCRIPTION TYPE STRING,
CONTROLLINGOBJECT TYPE STRING,
CONTROLLINGOBJECTTYPE TYPE STRING,
SALESDOCUMENT TYPE STRING,
SALESDOCUMENTITEM TYPE STRING,
SDDOCUMENTCATEGORY TYPE STRING,
USERISINVOLVED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IMPSTRUCTELEMT_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_IMPSTRUCTELEMT_STR-MANDT sy-vline 
WA_IMPSTRUCTELEMT_STR-CONTROLLINGOBJECTEXTERNALID sy-vline 
WA_IMPSTRUCTELEMT_STR-MASTERPROJECT sy-vline 
WA_IMPSTRUCTELEMT_STR-MASTERPROJECTUUID sy-vline 
WA_IMPSTRUCTELEMT_STR-MASTERPROJECTNAME sy-vline 
WA_IMPSTRUCTELEMT_STR-MASTERPROJECTTYPE sy-vline 
WA_IMPSTRUCTELEMT_STR-MASTERPROJECTISCONFIDENTIAL sy-vline 
WA_IMPSTRUCTELEMT_STR-MASTERPROJECTORGANIZATION sy-vline 
WA_IMPSTRUCTELEMT_STR-CONTROLLINGOBJECTDESCRIPTION sy-vline 
WA_IMPSTRUCTELEMT_STR-CONTROLLINGOBJECT sy-vline 
WA_IMPSTRUCTELEMT_STR-CONTROLLINGOBJECTTYPE sy-vline 
WA_IMPSTRUCTELEMT_STR-SALESDOCUMENT sy-vline 
WA_IMPSTRUCTELEMT_STR-SALESDOCUMENTITEM sy-vline 
WA_IMPSTRUCTELEMT_STR-SDDOCUMENTCATEGORY sy-vline 
WA_IMPSTRUCTELEMT_STR-USERISINVOLVED sy-vline      INTO ld_text SEPARATED BY SPACE.

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