ABAP Select data from SAP table EWCPARTS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EWCPARTS
*  INTO TABLE @DATA(IT_EWCPARTS2).
*--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_EWCPARTS INDEX 1 INTO DATA(WA_EWCPARTS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EWCPARTS>-ELEMENT = 1.
<EWCPARTS>-REFTYPE = 1.
<EWCPARTS>-TABELEM = 1.
<EWCPARTS>-REFOBJTYPE = 1.
<EWCPARTS>-REFSTRUCT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EWCPARTS-REFFIELD, sy-vline,
  WA_EWCPARTS-LOGICALSYSTEM, sy-vline,
  WA_EWCPARTS-RFCDEST, sy-vline,
  WA_EWCPARTS-ELEMTYPE, sy-vline,
  WA_EWCPARTS-OBLIGIMP, sy-vline,
  WA_EWCPARTS-EDITORDER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EWCPARTS 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_EWCPARTS 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_EWCPARTS INTO WA_EWCPARTS.


*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 LOGICALSYSTEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EWCPARTS-LOGICALSYSTEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWCPARTS-LOGICALSYSTEM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_EWCPARTS-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWCPARTS-LANGU.
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_EWCPARTS_STR, 
ELEMENT TYPE STRING,
REFTYPE TYPE STRING,
TABELEM TYPE STRING,
REFOBJTYPE TYPE STRING,
REFSTRUCT TYPE STRING,
REFFIELD TYPE STRING,
LOGICALSYSTEM TYPE STRING,
RFCDEST TYPE STRING,
ELEMTYPE TYPE STRING,
OBLIGIMP TYPE STRING,
EDITORDER TYPE STRING,
DESCRIPT TYPE STRING,
LANGU TYPE STRING,
IS_IMPORT TYPE STRING,
IS_EXPORT TYPE STRING,
REF_IS_O TYPE STRING,
REF_IS_D TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EWCPARTS_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_EWCPARTS_STR-ELEMENT sy-vline 
WA_EWCPARTS_STR-REFTYPE sy-vline 
WA_EWCPARTS_STR-TABELEM sy-vline 
WA_EWCPARTS_STR-REFOBJTYPE sy-vline 
WA_EWCPARTS_STR-REFSTRUCT sy-vline 
WA_EWCPARTS_STR-REFFIELD sy-vline 
WA_EWCPARTS_STR-LOGICALSYSTEM sy-vline 
WA_EWCPARTS_STR-RFCDEST sy-vline 
WA_EWCPARTS_STR-ELEMTYPE sy-vline 
WA_EWCPARTS_STR-OBLIGIMP sy-vline 
WA_EWCPARTS_STR-EDITORDER sy-vline 
WA_EWCPARTS_STR-DESCRIPT sy-vline 
WA_EWCPARTS_STR-LANGU sy-vline 
WA_EWCPARTS_STR-IS_IMPORT sy-vline 
WA_EWCPARTS_STR-IS_EXPORT sy-vline 
WA_EWCPARTS_STR-REF_IS_O sy-vline 
WA_EWCPARTS_STR-REF_IS_D sy-vline      INTO ld_text SEPARATED BY SPACE.

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