ABAP Select data from SAP table TDS_LWMOS_DOCUMENT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TDS_LWMOS_DOCUMENT
*  INTO TABLE @DATA(IT_TDS_LWMOS_DOCUMENT2).
*--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_TDS_LWMOS_DOCUMENT INDEX 1 INTO DATA(WA_TDS_LWMOS_DOCUMENT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TDS_LWMOS_DOCUMENT>-VBELN = 1.
<TDS_LWMOS_DOCUMENT>-BSTKD = 1.
<TDS_LWMOS_DOCUMENT>-AUART = 1.
<TDS_LWMOS_DOCUMENT>-TRVOG = 1.
<TDS_LWMOS_DOCUMENT>-VBTYP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TDS_LWMOS_DOCUMENT-AUDAT, sy-vline,
  WA_TDS_LWMOS_DOCUMENT-ERDAT, sy-vline,
  WA_TDS_LWMOS_DOCUMENT-ERZET, sy-vline,
  WA_TDS_LWMOS_DOCUMENT-VDATU, sy-vline,
  WA_TDS_LWMOS_DOCUMENT-NETWR, sy-vline,
  WA_TDS_LWMOS_DOCUMENT-NETWR_EXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TDS_LWMOS_DOCUMENT 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_TDS_LWMOS_DOCUMENT 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_TDS_LWMOS_DOCUMENT INTO WA_TDS_LWMOS_DOCUMENT.


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

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

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

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

*Conversion exit SXIDN, internal->external for field KUNAG_EMAIL
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_TDS_LWMOS_DOCUMENT-KUNAG_EMAIL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDS_LWMOS_DOCUMENT-KUNAG_EMAIL.
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_TDS_LWMOS_DOCUMENT_STR, 
VBELN TYPE STRING,
BSTKD TYPE STRING,
AUART TYPE STRING,
TRVOG TYPE STRING,
VBTYP TYPE STRING,
AUDAT TYPE STRING,
ERDAT TYPE STRING,
ERZET TYPE STRING,
VDATU TYPE STRING,
NETWR TYPE STRING,
NETWR_EXT TYPE STRING,
WAERK TYPE STRING,
CURR_ISO TYPE STRING,
SHSTK TYPE STRING,
OVSTA_CODE TYPE STRING,
OVSTA_TEXT TYPE STRING,
OVSTA_SVTY TYPE STRING,
OVSTA_REAS TYPE STRING,
KUNAG TYPE STRING,
KUNAG_ADRNR TYPE STRING,
KUNAG_NAME TYPE STRING,
KUNAG_STREET TYPE STRING,
KUNAG_HOUSENO TYPE STRING,
KUNAG_STREETNO TYPE STRING,
KUNAG_CITY TYPE STRING,
KUNAG_PCODE TYPE STRING,
KUNAG_REGION TYPE STRING,
KUNAG_COUNTRY TYPE STRING,
KUNAG_COUNTRY_ISO TYPE STRING,
KUNAG_TELNO TYPE STRING,
KUNAG_FAXNO TYPE STRING,
KUNAG_MOBNO TYPE STRING,
KUNAG_EMAIL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TDS_LWMOS_DOCUMENT_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_TDS_LWMOS_DOCUMENT_STR-VBELN sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-BSTKD sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-AUART sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-TRVOG sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-VBTYP sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-AUDAT sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-ERDAT sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-ERZET sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-VDATU sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-NETWR sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-NETWR_EXT sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-WAERK sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-CURR_ISO sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-SHSTK sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-OVSTA_CODE sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-OVSTA_TEXT sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-OVSTA_SVTY sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-OVSTA_REAS sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-KUNAG sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-KUNAG_ADRNR sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-KUNAG_NAME sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-KUNAG_STREET sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-KUNAG_HOUSENO sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-KUNAG_STREETNO sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-KUNAG_CITY sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-KUNAG_PCODE sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-KUNAG_REGION sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-KUNAG_COUNTRY sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-KUNAG_COUNTRY_ISO sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-KUNAG_TELNO sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-KUNAG_FAXNO sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-KUNAG_MOBNO sy-vline 
WA_TDS_LWMOS_DOCUMENT_STR-KUNAG_EMAIL sy-vline      INTO ld_text SEPARATED BY SPACE.

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