ABAP Select data from SAP table ELMT_ITEM_API into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ELMT_ITEM_API
*  INTO TABLE @DATA(IT_ELMT_ITEM_API2).
*--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_ELMT_ITEM_API INDEX 1 INTO DATA(WA_ELMT_ITEM_API2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ELMT_ITEM_API>-ITEM_GUID = 1.
<ELMT_ITEM_API>-LIST_ID = 1.
<ELMT_ITEM_API>-LIST_GUID = 1.
<ELMT_ITEM_API>-BU_PARTNER = 1.
<ELMT_ITEM_API>-CONTACTED = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ELMT_ITEM_API-WON, sy-vline,
  WA_ELMT_ITEM_API-POSTAL_ERROR, sy-vline,
  WA_ELMT_ITEM_API-DUPLICATE, sy-vline,
  WA_ELMT_ITEM_API-CITY, sy-vline,
  WA_ELMT_ITEM_API-POSTL_COD1, sy-vline,
  WA_ELMT_ITEM_API-POSTL_COD2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ELMT_ITEM_API 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_ELMT_ITEM_API 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_ELMT_ITEM_API INTO WA_ELMT_ITEM_API.


*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 BU_PARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ELMT_ITEM_API-BU_PARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ELMT_ITEM_API-BU_PARTNER.
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_ELMT_ITEM_API_STR, 
ITEM_GUID TYPE STRING,
LIST_ID TYPE STRING,
LIST_GUID TYPE STRING,
BU_PARTNER TYPE STRING,
CONTACTED TYPE STRING,
WON TYPE STRING,
POSTAL_ERROR TYPE STRING,
DUPLICATE TYPE STRING,
CITY TYPE STRING,
POSTL_COD1 TYPE STRING,
POSTL_COD2 TYPE STRING,
PO_BOX TYPE STRING,
PO_BOX_CIT TYPE STRING,
STREET TYPE STRING,
HOUSE_NO TYPE STRING,
COUNTRYISO TYPE STRING,
REGION TYPE STRING,
ID_NUMBER TYPE STRING,
NATION TYPE STRING,
ORG_TITLE_KEY TYPE STRING,
ORG_NAME1 TYPE STRING,
ORG_NAME2 TYPE STRING,
ORG_NAME3 TYPE STRING,
ORG_LEGALFORM TYPE STRING,
ORG_FOUND_DATE TYPE STRING,
ORG_TELEPHONE TYPE STRING,
ORG_TEL_EXT TYPE STRING,
ORG_FAX TYPE STRING,
ORG_FAX_EXT TYPE STRING,
ORG_URI TYPE STRING,
PERS_TITLE_KEY TYPE STRING,
PERS_FIRSTNAME TYPE STRING,
PERS_LASTNAME TYPE STRING,
PERS_INITIAL TYPE STRING,
PERS_TITLE_ACA1 TYPE STRING,
PERS_BIRTHDATE TYPE STRING,
PERS_SEX TYPE STRING,
PERS_MARITALSTAT TYPE STRING,
PERS_TELEPHON TYPE STRING,
PERS_TEL_EXT TYPE STRING,
PERS_FAX TYPE STRING,
PERS_FAX_EXT TYPE STRING,
PERS_E_MAIL TYPE STRING,
PERS_PAGER TYPE STRING,
CP_FUNCTIONNAME TYPE STRING,
CP_FUNCTIONKEY TYPE STRING,
ITEM_CUSTOMER_EXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ELMT_ITEM_API_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_ELMT_ITEM_API_STR-ITEM_GUID sy-vline 
WA_ELMT_ITEM_API_STR-LIST_ID sy-vline 
WA_ELMT_ITEM_API_STR-LIST_GUID sy-vline 
WA_ELMT_ITEM_API_STR-BU_PARTNER sy-vline 
WA_ELMT_ITEM_API_STR-CONTACTED sy-vline 
WA_ELMT_ITEM_API_STR-WON sy-vline 
WA_ELMT_ITEM_API_STR-POSTAL_ERROR sy-vline 
WA_ELMT_ITEM_API_STR-DUPLICATE sy-vline 
WA_ELMT_ITEM_API_STR-CITY sy-vline 
WA_ELMT_ITEM_API_STR-POSTL_COD1 sy-vline 
WA_ELMT_ITEM_API_STR-POSTL_COD2 sy-vline 
WA_ELMT_ITEM_API_STR-PO_BOX sy-vline 
WA_ELMT_ITEM_API_STR-PO_BOX_CIT sy-vline 
WA_ELMT_ITEM_API_STR-STREET sy-vline 
WA_ELMT_ITEM_API_STR-HOUSE_NO sy-vline 
WA_ELMT_ITEM_API_STR-COUNTRYISO sy-vline 
WA_ELMT_ITEM_API_STR-REGION sy-vline 
WA_ELMT_ITEM_API_STR-ID_NUMBER sy-vline 
WA_ELMT_ITEM_API_STR-NATION sy-vline 
WA_ELMT_ITEM_API_STR-ORG_TITLE_KEY sy-vline 
WA_ELMT_ITEM_API_STR-ORG_NAME1 sy-vline 
WA_ELMT_ITEM_API_STR-ORG_NAME2 sy-vline 
WA_ELMT_ITEM_API_STR-ORG_NAME3 sy-vline 
WA_ELMT_ITEM_API_STR-ORG_LEGALFORM sy-vline 
WA_ELMT_ITEM_API_STR-ORG_FOUND_DATE sy-vline 
WA_ELMT_ITEM_API_STR-ORG_TELEPHONE sy-vline 
WA_ELMT_ITEM_API_STR-ORG_TEL_EXT sy-vline 
WA_ELMT_ITEM_API_STR-ORG_FAX sy-vline 
WA_ELMT_ITEM_API_STR-ORG_FAX_EXT sy-vline 
WA_ELMT_ITEM_API_STR-ORG_URI sy-vline 
WA_ELMT_ITEM_API_STR-PERS_TITLE_KEY sy-vline 
WA_ELMT_ITEM_API_STR-PERS_FIRSTNAME sy-vline 
WA_ELMT_ITEM_API_STR-PERS_LASTNAME sy-vline 
WA_ELMT_ITEM_API_STR-PERS_INITIAL sy-vline 
WA_ELMT_ITEM_API_STR-PERS_TITLE_ACA1 sy-vline 
WA_ELMT_ITEM_API_STR-PERS_BIRTHDATE sy-vline 
WA_ELMT_ITEM_API_STR-PERS_SEX sy-vline 
WA_ELMT_ITEM_API_STR-PERS_MARITALSTAT sy-vline 
WA_ELMT_ITEM_API_STR-PERS_TELEPHON sy-vline 
WA_ELMT_ITEM_API_STR-PERS_TEL_EXT sy-vline 
WA_ELMT_ITEM_API_STR-PERS_FAX sy-vline 
WA_ELMT_ITEM_API_STR-PERS_FAX_EXT sy-vline 
WA_ELMT_ITEM_API_STR-PERS_E_MAIL sy-vline 
WA_ELMT_ITEM_API_STR-PERS_PAGER sy-vline 
WA_ELMT_ITEM_API_STR-CP_FUNCTIONNAME sy-vline 
WA_ELMT_ITEM_API_STR-CP_FUNCTIONKEY sy-vline 
WA_ELMT_ITEM_API_STR-ITEM_CUSTOMER_EXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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