ABAP Select data from SAP table LMD_COM_DOC_HDR_HEADER into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP LMD_COM_DOC_HDR_HEADER 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_COM_DOC_HDR_HEADER. 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_COM_DOC_HDR_HEADER 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_COM_DOC_HDR_HEADER TYPE STANDARD TABLE OF LMD_COM_DOC_HDR_HEADER,
      WA_LMD_COM_DOC_HDR_HEADER TYPE LMD_COM_DOC_HDR_HEADER,
      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_COM_DOC_HDR_HEADER> TYPE LMD_COM_DOC_HDR_HEADER.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LMD_COM_DOC_HDR_HEADER
*  INTO TABLE @DATA(IT_LMD_COM_DOC_HDR_HEADER2).
*--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_COM_DOC_HDR_HEADER INDEX 1 INTO DATA(WA_LMD_COM_DOC_HDR_HEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LMD_COM_DOC_HDR_HEADER>-DOCUMENT_HEADER_UUID = 1.
<LMD_COM_DOC_HDR_HEADER>-ACTUAL_GOODS_MVMNT_DATE = 1.
<LMD_COM_DOC_HDR_HEADER>-PLANNED_GOODS_MVMNT_DATE = 1.
<LMD_COM_DOC_HDR_HEADER>-DOC_TYPE = 1.
<LMD_COM_DOC_HDR_HEADER>-ROUTE_UUID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LMD_COM_DOC_HDR_HEADER-STOP_UUID, sy-vline,
  WA_LMD_COM_DOC_HDR_HEADER-LMD_DOCUMENT_TYPE, sy-vline,
  WA_LMD_COM_DOC_HDR_HEADER-DOCUMENT_ID, sy-vline,
  WA_LMD_COM_DOC_HDR_HEADER-DOCUMENT_DATE, sy-vline,
  WA_LMD_COM_DOC_HDR_HEADER-DOCUMENT_YEAR, sy-vline,
  WA_LMD_COM_DOC_HDR_HEADER-SOLDTO_PARTY_ID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LMD_COM_DOC_HDR_HEADER 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_COM_DOC_HDR_HEADER 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_COM_DOC_HDR_HEADER INTO WA_LMD_COM_DOC_HDR_HEADER.


*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 AUART, internal->external for field DOC_TYPE
CALL FUNCTION 'CONVERSION_EXIT_AUART_OUTPUT'
  EXPORTING
    input =                      WA_LMD_COM_DOC_HDR_HEADER-DOC_TYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LMD_COM_DOC_HDR_HEADER-DOC_TYPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOCUMENT_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LMD_COM_DOC_HDR_HEADER-DOCUMENT_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LMD_COM_DOC_HDR_HEADER-DOCUMENT_ID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field DOCUMENT_YEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_LMD_COM_DOC_HDR_HEADER-DOCUMENT_YEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LMD_COM_DOC_HDR_HEADER-DOCUMENT_YEAR.
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_COM_DOC_HDR_HEADER_STR, 
DOCUMENT_HEADER_UUID TYPE STRING,
ACTUAL_GOODS_MVMNT_DATE TYPE STRING,
PLANNED_GOODS_MVMNT_DATE TYPE STRING,
DOC_TYPE TYPE STRING,
ROUTE_UUID TYPE STRING,
STOP_UUID TYPE STRING,
LMD_DOCUMENT_TYPE TYPE STRING,
DOCUMENT_ID TYPE STRING,
DOCUMENT_DATE TYPE STRING,
DOCUMENT_YEAR TYPE STRING,
SOLDTO_PARTY_ID TYPE STRING,
SHIPTO_PARTY_ID TYPE STRING,
ADDRESS_ID TYPE STRING,
SALES_ORGANIZATION TYPE STRING,
DISTRIBUTION_CHANNEL TYPE STRING,
DIVISION TYPE STRING,
REASON_CODE TYPE STRING,
SIGNATURE_DATE TYPE STRING,
ORIGINAL_SIGNATURE_DATE TYPE STRING,
CUSTOMER_REFERENCE_NUMBER TYPE STRING,
ORIG_CUSTOMER_REFERENCE_NUMBER TYPE STRING,
CREATED_BY_SETTLEMENT TYPE STRING,
IS_RETURN TYPE STRING,
IS_MANUALLY_ADDED TYPE STRING,
CURRENCY 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,
INVOICE_PRINT_DATE_TIME TYPE STRING,
PAYMENT_TERMS TYPE STRING,
SD_DOCUMENT_TYPE TYPE STRING,
CUSTOMER_REL_BILL_DOC_NUMBER TYPE STRING,
CUSTOMER_REL_ORDER_NUMBER TYPE STRING,
ASSIGNED_AMOUNT TYPE STRING,
EEW_LMD_COM_DOC_HDR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LMD_COM_DOC_HDR_HEADER_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_COM_DOC_HDR_HEADER_STR-DOCUMENT_HEADER_UUID sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-ACTUAL_GOODS_MVMNT_DATE sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-PLANNED_GOODS_MVMNT_DATE sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-DOC_TYPE sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-ROUTE_UUID sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-STOP_UUID sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-LMD_DOCUMENT_TYPE sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-DOCUMENT_ID sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-DOCUMENT_DATE sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-DOCUMENT_YEAR sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-SOLDTO_PARTY_ID sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-SHIPTO_PARTY_ID sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-ADDRESS_ID sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-SALES_ORGANIZATION sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-DISTRIBUTION_CHANNEL sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-DIVISION sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-REASON_CODE sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-SIGNATURE_DATE sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-ORIGINAL_SIGNATURE_DATE sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-CUSTOMER_REFERENCE_NUMBER sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-ORIG_CUSTOMER_REFERENCE_NUMBER sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-CREATED_BY_SETTLEMENT sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-IS_RETURN sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-IS_MANUALLY_ADDED sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-CURRENCY sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-TOTAL_GROSS_AMOUNT sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-CONDITION_VALUE_1 sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-CONDITION_VALUE_2 sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-CONDITION_VALUE_3 sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-CONDITION_VALUE_4 sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-INVOICE_PRINT_DATE_TIME sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-PAYMENT_TERMS sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-SD_DOCUMENT_TYPE sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-CUSTOMER_REL_BILL_DOC_NUMBER sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-CUSTOMER_REL_ORDER_NUMBER sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-ASSIGNED_AMOUNT sy-vline 
WA_LMD_COM_DOC_HDR_HEADER_STR-EEW_LMD_COM_DOC_HDR sy-vline      INTO ld_text SEPARATED BY SPACE.

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