ABAP Select data from SAP table /DSD/ME_COCI_ITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /DSD/ME_COCI_ITEM
*  INTO TABLE @DATA(IT_/DSD/ME_COCI_ITEM2).
*--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_/DSD/ME_COCI_ITEM INDEX 1 INTO DATA(WA_/DSD/ME_COCI_ITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</DSD/ME_COCI_ITEM>-CLIENT = 1.
</DSD/ME_COCI_ITEM>-TOUR_ID = 1.
</DSD/ME_COCI_ITEM>-CHECK_ID = 1.
</DSD/ME_COCI_ITEM>-INV_TYPE = 1.
</DSD/ME_COCI_ITEM>-MAT_NO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/DSD/ME_COCI_ITEM-MAT_NO_T, sy-vline,
  WA_/DSD/ME_COCI_ITEM-UOM, sy-vline,
  WA_/DSD/ME_COCI_ITEM-ROTRUCK, sy-vline,
  WA_/DSD/ME_COCI_ITEM-ITM_NO, sy-vline,
  WA_/DSD/ME_COCI_ITEM-PLAN_QTY, sy-vline,
  WA_/DSD/ME_COCI_ITEM-ACT_QTY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/DSD/ME_COCI_ITEM 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_/DSD/ME_COCI_ITEM 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_/DSD/ME_COCI_ITEM INTO WA_/DSD/ME_COCI_ITEM.


*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 MATN1, internal->external for field MAT_NO
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_/DSD/ME_COCI_ITEM-MAT_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/DSD/ME_COCI_ITEM-MAT_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MAT_NO_T
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_/DSD/ME_COCI_ITEM-MAT_NO_T
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/DSD/ME_COCI_ITEM-MAT_NO_T.
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_/DSD/ME_COCI_ITEM_STR, 
CLIENT TYPE STRING,
TOUR_ID TYPE STRING,
CHECK_ID TYPE STRING,
INV_TYPE TYPE STRING,
MAT_NO TYPE STRING,
MAT_NO_T TYPE STRING,
UOM TYPE STRING,
ROTRUCK TYPE STRING,
ITM_NO TYPE STRING,
PLAN_QTY TYPE STRING,
ACT_QTY TYPE STRING,
COCI_REASON TYPE STRING,
EXTFLD1 TYPE STRING,
EXTFLD2 TYPE STRING,
EXTFLD3 TYPE STRING,
EXTFLD4 TYPE STRING,
EXTFLD5 TYPE STRING,
EXTFLD6 TYPE STRING,
BATCH TYPE STRING,
BWTAR TYPE STRING,
PLANT TYPE STRING,
SPEC_RETURN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/DSD/ME_COCI_ITEM_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_/DSD/ME_COCI_ITEM_STR-CLIENT sy-vline 
WA_/DSD/ME_COCI_ITEM_STR-TOUR_ID sy-vline 
WA_/DSD/ME_COCI_ITEM_STR-CHECK_ID sy-vline 
WA_/DSD/ME_COCI_ITEM_STR-INV_TYPE sy-vline 
WA_/DSD/ME_COCI_ITEM_STR-MAT_NO sy-vline 
WA_/DSD/ME_COCI_ITEM_STR-MAT_NO_T sy-vline 
WA_/DSD/ME_COCI_ITEM_STR-UOM sy-vline 
WA_/DSD/ME_COCI_ITEM_STR-ROTRUCK sy-vline 
WA_/DSD/ME_COCI_ITEM_STR-ITM_NO sy-vline 
WA_/DSD/ME_COCI_ITEM_STR-PLAN_QTY sy-vline 
WA_/DSD/ME_COCI_ITEM_STR-ACT_QTY sy-vline 
WA_/DSD/ME_COCI_ITEM_STR-COCI_REASON sy-vline 
WA_/DSD/ME_COCI_ITEM_STR-EXTFLD1 sy-vline 
WA_/DSD/ME_COCI_ITEM_STR-EXTFLD2 sy-vline 
WA_/DSD/ME_COCI_ITEM_STR-EXTFLD3 sy-vline 
WA_/DSD/ME_COCI_ITEM_STR-EXTFLD4 sy-vline 
WA_/DSD/ME_COCI_ITEM_STR-EXTFLD5 sy-vline 
WA_/DSD/ME_COCI_ITEM_STR-EXTFLD6 sy-vline 
WA_/DSD/ME_COCI_ITEM_STR-BATCH sy-vline 
WA_/DSD/ME_COCI_ITEM_STR-BWTAR sy-vline 
WA_/DSD/ME_COCI_ITEM_STR-PLANT sy-vline 
WA_/DSD/ME_COCI_ITEM_STR-SPEC_RETURN sy-vline      INTO ld_text SEPARATED BY SPACE.

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