ABAP Select data from SAP table /SAPDII/WTYITEM_DIA_46C2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPDII/WTYITEM_DIA_46C2 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 /SAPDII/WTYITEM_DIA_46C2. 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 /SAPDII/WTYITEM_DIA_46C2 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_/SAPDII/WTYITEM_DIA_46C2 TYPE STANDARD TABLE OF /SAPDII/WTYITEM_DIA_46C2,
      WA_/SAPDII/WTYITEM_DIA_46C2 TYPE /SAPDII/WTYITEM_DIA_46C2,
      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: </SAPDII/WTYITEM_DIA_46C2> TYPE /SAPDII/WTYITEM_DIA_46C2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_/SAPDII/WTYITEM_DIA_46C2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPDII/WTYITEM_DIA_46C2
  INTO TABLE IT_/SAPDII/WTYITEM_DIA_46C2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPDII/WTYITEM_DIA_46C2
*  INTO TABLE @DATA(IT_/SAPDII/WTYITEM_DIA_46C22).
*--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_/SAPDII/WTYITEM_DIA_46C2 INDEX 1 INTO DATA(WA_/SAPDII/WTYITEM_DIA_46C22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPDII/WTYITEM_DIA_46C2 ASSIGNING </SAPDII/WTYITEM_DIA_46C2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPDII/WTYITEM_DIA_46C2>-MANDT = 1.
</SAPDII/WTYITEM_DIA_46C2>-PVGUID = 1.
</SAPDII/WTYITEM_DIA_46C2>-PVCNT = 1.
</SAPDII/WTYITEM_DIA_46C2>-POSNR = 1.
</SAPDII/WTYITEM_DIA_46C2>-POSKT = 1.

ENDLOOP.

LOOP AT IT_/SAPDII/WTYITEM_DIA_46C2 INTO WA_/SAPDII/WTYITEM_DIA_46C2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPDII/WTYITEM_DIA_46C2-DEFCT, sy-vline,
  WA_/SAPDII/WTYITEM_DIA_46C2-ITMNO, sy-vline,
  WA_/SAPDII/WTYITEM_DIA_46C2-QUANT, sy-vline,
  WA_/SAPDII/WTYITEM_DIA_46C2-MEINH, sy-vline,
  WA_/SAPDII/WTYITEM_DIA_46C2-CONTR, sy-vline,
  WA_/SAPDII/WTYITEM_DIA_46C2-CNTTY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPDII/WTYITEM_DIA_46C2 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_/SAPDII/WTYITEM_DIA_46C2 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_/SAPDII/WTYITEM_DIA_46C2 INTO WA_/SAPDII/WTYITEM_DIA_46C2.


*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 CUNIT, internal->external for field MEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPDII/WTYITEM_DIA_46C2-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPDII/WTYITEM_DIA_46C2-MEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_/SAPDII/WTYITEM_DIA_46C2-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPDII/WTYITEM_DIA_46C2-MATNR.
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_/SAPDII/WTYITEM_DIA_46C2_STR, 
MANDT TYPE STRING,
PVGUID TYPE STRING,
PVCNT TYPE STRING,
POSNR TYPE STRING,
POSKT TYPE STRING,
DEFCT TYPE STRING,
ITMNO TYPE STRING,
QUANT TYPE STRING,
MEINH TYPE STRING,
CONTR TYPE STRING,
CNTTY TYPE STRING,
REJCD TYPE STRING,
REFKT TYPE STRING,
REFNR TYPE STRING,
RETPA TYPE STRING,
CAUSP TYPE STRING,
PVTXT TYPE STRING,
VALIC TYPE STRING,
VALOV TYPE STRING,
VALIV TYPE STRING,
VALOC TYPE STRING,
MATNR TYPE STRING,
MDOCM TYPE STRING,
LOG_HANDLE TYPE STRING,
HERST TYPE STRING,
SPLIT TYPE STRING,
RETPA_V TYPE STRING,
TAX_CODE TYPE STRING,
TXJCD1 TYPE STRING,
TXJCD2 TYPE STRING,
TXJCD3 TYPE STRING,
RESULT_OUT_MWTYI TYPE STRING,
RESULT_IN_MWTYI TYPE STRING,
I_DUMMY TYPE STRING,
PRICING_OK TYPE STRING,
NEW_ITEM TYPE STRING,
MESSAGE TYPE STRING,
REJCD_TXT TYPE STRING,
ITMTX TYPE STRING,
DEFTX TYPE STRING,
DISTANCE_PART TYPE STRING,
P_UNIT TYPE STRING,
BETRG TYPE STRING,
KSCHL TYPE STRING,
TEXT_EXISTS TYPE STRING,
PNAME TYPE STRING,
CREADAT TYPE STRING,
CREABY TYPE STRING,
CHNGDAT TYPE STRING,
CHNGBY TYPE STRING,
LOG_MEMO_ITEM TYPE STRING,
BETRG_CHANGE TYPE STRING,
I_HANDLE TYPE STRING,
CON_CRNCY TYPE STRING,
RETPA_TXT TYPE STRING,
RETPA_V_TXT TYPE STRING,
POSNR_HIER TYPE STRING,
MAKTX TYPE STRING,
CHANGE_FLAG TYPE STRING,
MEASURE_POINT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPDII/WTYITEM_DIA_46C2_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_/SAPDII/WTYITEM_DIA_46C2_STR-MANDT sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-PVGUID sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-PVCNT sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-POSNR sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-POSKT sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-DEFCT sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-ITMNO sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-QUANT sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-MEINH sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-CONTR sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-CNTTY sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-REJCD sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-REFKT sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-REFNR sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-RETPA sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-CAUSP sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-PVTXT sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-VALIC sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-VALOV sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-VALIV sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-VALOC sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-MATNR sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-MDOCM sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-LOG_HANDLE sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-HERST sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-SPLIT sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-RETPA_V sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-TAX_CODE sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-TXJCD1 sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-TXJCD2 sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-TXJCD3 sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-RESULT_OUT_MWTYI sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-RESULT_IN_MWTYI sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-I_DUMMY sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-PRICING_OK sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-NEW_ITEM sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-MESSAGE sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-REJCD_TXT sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-ITMTX sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-DEFTX sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-DISTANCE_PART sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-P_UNIT sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-BETRG sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-KSCHL sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-TEXT_EXISTS sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-PNAME sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-CREADAT sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-CREABY sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-CHNGDAT sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-CHNGBY sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-LOG_MEMO_ITEM sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-BETRG_CHANGE sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-I_HANDLE sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-CON_CRNCY sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-RETPA_TXT sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-RETPA_V_TXT sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-POSNR_HIER sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-MAKTX sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-CHANGE_FLAG sy-vline 
WA_/SAPDII/WTYITEM_DIA_46C2_STR-MEASURE_POINT sy-vline      INTO ld_text SEPARATED BY SPACE.

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