ABAP Select data from SAP table LMD_MA_DOCUMENT_ITEM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP LMD_MA_DOCUMENT_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 LMD_MA_DOCUMENT_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 LMD_MA_DOCUMENT_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_LMD_MA_DOCUMENT_ITEM TYPE STANDARD TABLE OF LMD_MA_DOCUMENT_ITEM,
      WA_LMD_MA_DOCUMENT_ITEM TYPE LMD_MA_DOCUMENT_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: <LMD_MA_DOCUMENT_ITEM> TYPE LMD_MA_DOCUMENT_ITEM.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LMD_MA_DOCUMENT_ITEM
*  INTO TABLE @DATA(IT_LMD_MA_DOCUMENT_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_LMD_MA_DOCUMENT_ITEM INDEX 1 INTO DATA(WA_LMD_MA_DOCUMENT_ITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LMD_MA_DOCUMENT_ITEM>-DOCUMENT_ITEM_UUID = 1.
<LMD_MA_DOCUMENT_ITEM>-ROUTE_UUID = 1.
<LMD_MA_DOCUMENT_ITEM>-STOP_UUID = 1.
<LMD_MA_DOCUMENT_ITEM>-DOCUMENT_HEADER_UUID = 1.
<LMD_MA_DOCUMENT_ITEM>-ITEM_NUMBER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LMD_MA_DOCUMENT_ITEM-DOCUMENT_ID, sy-vline,
  WA_LMD_MA_DOCUMENT_ITEM-LMD_DOCUMENT_TYPE, sy-vline,
  WA_LMD_MA_DOCUMENT_ITEM-HL_ITEM_NUMBER, sy-vline,
  WA_LMD_MA_DOCUMENT_ITEM-PRODUCT_ID, sy-vline,
  WA_LMD_MA_DOCUMENT_ITEM-QUANTITY, sy-vline,
  WA_LMD_MA_DOCUMENT_ITEM-ACTUAL_QUANTITY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LMD_MA_DOCUMENT_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_LMD_MA_DOCUMENT_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_LMD_MA_DOCUMENT_ITEM INTO WA_LMD_MA_DOCUMENT_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 ALPHA, internal->external for field DOCUMENT_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LMD_MA_DOCUMENT_ITEM-DOCUMENT_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LMD_MA_DOCUMENT_ITEM-DOCUMENT_ID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field PRODUCT_ID
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_LMD_MA_DOCUMENT_ITEM-PRODUCT_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LMD_MA_DOCUMENT_ITEM-PRODUCT_ID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LMD_MA_DOCUMENT_ITEM-UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LMD_MA_DOCUMENT_ITEM-UOM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REF_DOC_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LMD_MA_DOCUMENT_ITEM-REF_DOC_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LMD_MA_DOCUMENT_ITEM-REF_DOC_ID.
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_LMD_MA_DOCUMENT_ITEM_STR, 
DOCUMENT_ITEM_UUID TYPE STRING,
ROUTE_UUID TYPE STRING,
STOP_UUID TYPE STRING,
DOCUMENT_HEADER_UUID TYPE STRING,
ITEM_NUMBER TYPE STRING,
DOCUMENT_ID TYPE STRING,
LMD_DOCUMENT_TYPE TYPE STRING,
HL_ITEM_NUMBER TYPE STRING,
PRODUCT_ID TYPE STRING,
QUANTITY TYPE STRING,
ACTUAL_QUANTITY TYPE STRING,
UOM TYPE STRING,
BATCH TYPE STRING,
PLANT TYPE STRING,
IS_RETURN_ITEM TYPE STRING,
IS_FREE_GOODS_ITEM TYPE STRING,
REASON_CODE TYPE STRING,
INVENTORY_GROUP TYPE STRING,
INVENTORY_GROUP_DIFF TYPE STRING,
REF_LMD_DOC_TYPE TYPE STRING,
REF_DOC_ID TYPE STRING,
REF_DOC_ID_ITEM TYPE STRING,
CUSTOMER_REFERENCE_NUMBER TYPE STRING,
UNLOADING_POINT TYPE STRING,
IS_MANUALLY_ADDED TYPE STRING,
IS_TIED_EMPTY TYPE STRING,
IS_UNTIED_EMPTY TYPE STRING,
TOTAL_GROSS_AMOUNT TYPE STRING,
CONDITION_VALUE_1 TYPE STRING,
CONDITION_VALUE_2 TYPE STRING,
CONDITION_VALUE_3 TYPE STRING,
CONDITION_VALUE_4 TYPE STRING,
CURRENCY TYPE STRING,
EEW_LMD_COM_DOC_ITM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LMD_MA_DOCUMENT_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_LMD_MA_DOCUMENT_ITEM_STR-DOCUMENT_ITEM_UUID sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-ROUTE_UUID sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-STOP_UUID sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-DOCUMENT_HEADER_UUID sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-ITEM_NUMBER sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-DOCUMENT_ID sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-LMD_DOCUMENT_TYPE sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-HL_ITEM_NUMBER sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-PRODUCT_ID sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-QUANTITY sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-ACTUAL_QUANTITY sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-UOM sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-BATCH sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-PLANT sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-IS_RETURN_ITEM sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-IS_FREE_GOODS_ITEM sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-REASON_CODE sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-INVENTORY_GROUP sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-INVENTORY_GROUP_DIFF sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-REF_LMD_DOC_TYPE sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-REF_DOC_ID sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-REF_DOC_ID_ITEM sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-CUSTOMER_REFERENCE_NUMBER sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-UNLOADING_POINT sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-IS_MANUALLY_ADDED sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-IS_TIED_EMPTY sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-IS_UNTIED_EMPTY sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-TOTAL_GROSS_AMOUNT sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-CONDITION_VALUE_1 sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-CONDITION_VALUE_2 sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-CONDITION_VALUE_3 sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-CONDITION_VALUE_4 sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-CURRENCY sy-vline 
WA_LMD_MA_DOCUMENT_ITEM_STR-EEW_LMD_COM_DOC_ITM sy-vline      INTO ld_text SEPARATED BY SPACE.

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