ABAP Select data from SAP table LWM_LSO_S_COURSE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LWM_LSO_S_COURSE
*  INTO TABLE @DATA(IT_LWM_LSO_S_COURSE2).
*--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_LWM_LSO_S_COURSE INDEX 1 INTO DATA(WA_LWM_LSO_S_COURSE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LWM_LSO_S_COURSE>-COURSE_ID = 1.
<LWM_LSO_S_COURSE>-COURSETYPE_ID = 1.
<LWM_LSO_S_COURSE>-COURSEGRP_ID = 1.
<LWM_LSO_S_COURSE>-COURSE_TEXT = 1.
<LWM_LSO_S_COURSE>-IS_ELEARNING = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LWM_LSO_S_COURSE-LOCATION, sy-vline,
  WA_LWM_LSO_S_COURSE-ADDRESS, sy-vline,
  WA_LWM_LSO_S_COURSE-STREET, sy-vline,
  WA_LWM_LSO_S_COURSE-CITY, sy-vline,
  WA_LWM_LSO_S_COURSE-POSTALCODE, sy-vline,
  WA_LWM_LSO_S_COURSE-COUNTRY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LWM_LSO_S_COURSE 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_LWM_LSO_S_COURSE 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_LWM_LSO_S_COURSE INTO WA_LWM_LSO_S_COURSE.


*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 TPARTDOCNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LWM_LSO_S_COURSE-TPARTDOCNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LWM_LSO_S_COURSE-TPARTDOCNO.
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_LWM_LSO_S_COURSE_STR, 
COURSE_ID TYPE STRING,
COURSETYPE_ID TYPE STRING,
COURSEGRP_ID TYPE STRING,
COURSE_TEXT TYPE STRING,
IS_ELEARNING TYPE STRING,
LOCATION TYPE STRING,
ADDRESS TYPE STRING,
STREET TYPE STRING,
CITY TYPE STRING,
POSTALCODE TYPE STRING,
COUNTRY TYPE STRING,
REGION TYPE STRING,
HOUSENUMBER TYPE STRING,
LONGITUDE TYPE STRING,
LATITUDE TYPE STRING,
STARTDATE TYPE STRING,
ENDDATE TYPE STRING,
AVAILABLE_SEATS TYPE STRING,
DURATION TYPE STRING,
DURATION_UNIT TYPE STRING,
STATUS TYPE STRING,
STATUS_DESCR TYPE STRING,
CONTENT_MIMETYPE TYPE STRING,
CONTENT_FILENAME TYPE STRING,
CONTENT_SIZE TYPE STRING,
STATIC_CONTENT_LINK TYPE STRING,
BEGINTIME TYPE STRING,
ENDTIME TYPE STRING,
LANGUAGE_KEY TYPE STRING,
OBJECTTYPE TYPE STRING,
TITLE TYPE STRING,
CANCEL_POLICY TYPE STRING,
COURSETYPE_TXT TYPE STRING,
COURSE_TFTEXT TYPE STRING,
CURRTYPE_ID TYPE STRING,
MESSAGE_TYPE TYPE STRING,
MESSAGE TYPE STRING,
PRICE TYPE STRING,
CURRENCY_TYPE TYPE STRING,
CURR_ID TYPE STRING,
MACID TYPE STRING,
MICID TYPE STRING,
ESIG_REQUIRED TYPE STRING,
TPARTDOCNO TYPE STRING,
BOOKABLE_VIA_CURRI TYPE STRING,
BOOKED_VIA_CURRI TYPE STRING,
MIN_COMPL_TIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LWM_LSO_S_COURSE_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_LWM_LSO_S_COURSE_STR-COURSE_ID sy-vline 
WA_LWM_LSO_S_COURSE_STR-COURSETYPE_ID sy-vline 
WA_LWM_LSO_S_COURSE_STR-COURSEGRP_ID sy-vline 
WA_LWM_LSO_S_COURSE_STR-COURSE_TEXT sy-vline 
WA_LWM_LSO_S_COURSE_STR-IS_ELEARNING sy-vline 
WA_LWM_LSO_S_COURSE_STR-LOCATION sy-vline 
WA_LWM_LSO_S_COURSE_STR-ADDRESS sy-vline 
WA_LWM_LSO_S_COURSE_STR-STREET sy-vline 
WA_LWM_LSO_S_COURSE_STR-CITY sy-vline 
WA_LWM_LSO_S_COURSE_STR-POSTALCODE sy-vline 
WA_LWM_LSO_S_COURSE_STR-COUNTRY sy-vline 
WA_LWM_LSO_S_COURSE_STR-REGION sy-vline 
WA_LWM_LSO_S_COURSE_STR-HOUSENUMBER sy-vline 
WA_LWM_LSO_S_COURSE_STR-LONGITUDE sy-vline 
WA_LWM_LSO_S_COURSE_STR-LATITUDE sy-vline 
WA_LWM_LSO_S_COURSE_STR-STARTDATE sy-vline 
WA_LWM_LSO_S_COURSE_STR-ENDDATE sy-vline 
WA_LWM_LSO_S_COURSE_STR-AVAILABLE_SEATS sy-vline 
WA_LWM_LSO_S_COURSE_STR-DURATION sy-vline 
WA_LWM_LSO_S_COURSE_STR-DURATION_UNIT sy-vline 
WA_LWM_LSO_S_COURSE_STR-STATUS sy-vline 
WA_LWM_LSO_S_COURSE_STR-STATUS_DESCR sy-vline 
WA_LWM_LSO_S_COURSE_STR-CONTENT_MIMETYPE sy-vline 
WA_LWM_LSO_S_COURSE_STR-CONTENT_FILENAME sy-vline 
WA_LWM_LSO_S_COURSE_STR-CONTENT_SIZE sy-vline 
WA_LWM_LSO_S_COURSE_STR-STATIC_CONTENT_LINK sy-vline 
WA_LWM_LSO_S_COURSE_STR-BEGINTIME sy-vline 
WA_LWM_LSO_S_COURSE_STR-ENDTIME sy-vline 
WA_LWM_LSO_S_COURSE_STR-LANGUAGE_KEY sy-vline 
WA_LWM_LSO_S_COURSE_STR-OBJECTTYPE sy-vline 
WA_LWM_LSO_S_COURSE_STR-TITLE sy-vline 
WA_LWM_LSO_S_COURSE_STR-CANCEL_POLICY sy-vline 
WA_LWM_LSO_S_COURSE_STR-COURSETYPE_TXT sy-vline 
WA_LWM_LSO_S_COURSE_STR-COURSE_TFTEXT sy-vline 
WA_LWM_LSO_S_COURSE_STR-CURRTYPE_ID sy-vline 
WA_LWM_LSO_S_COURSE_STR-MESSAGE_TYPE sy-vline 
WA_LWM_LSO_S_COURSE_STR-MESSAGE sy-vline 
WA_LWM_LSO_S_COURSE_STR-PRICE sy-vline 
WA_LWM_LSO_S_COURSE_STR-CURRENCY_TYPE sy-vline 
WA_LWM_LSO_S_COURSE_STR-CURR_ID sy-vline 
WA_LWM_LSO_S_COURSE_STR-MACID sy-vline 
WA_LWM_LSO_S_COURSE_STR-MICID sy-vline 
WA_LWM_LSO_S_COURSE_STR-ESIG_REQUIRED sy-vline 
WA_LWM_LSO_S_COURSE_STR-TPARTDOCNO sy-vline 
WA_LWM_LSO_S_COURSE_STR-BOOKABLE_VIA_CURRI sy-vline 
WA_LWM_LSO_S_COURSE_STR-BOOKED_VIA_CURRI sy-vline 
WA_LWM_LSO_S_COURSE_STR-MIN_COMPL_TIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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