ABAP Select data from SAP table LWM_LSO_S_CURRICULUM 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_CURRICULUM 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_CURRICULUM. 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_CURRICULUM 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_CURRICULUM TYPE STANDARD TABLE OF LWM_LSO_S_CURRICULUM,
      WA_LWM_LSO_S_CURRICULUM TYPE LWM_LSO_S_CURRICULUM,
      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_CURRICULUM> TYPE LWM_LSO_S_CURRICULUM.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LWM_LSO_S_CURRICULUM
*  INTO TABLE @DATA(IT_LWM_LSO_S_CURRICULUM2).
*--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_CURRICULUM INDEX 1 INTO DATA(WA_LWM_LSO_S_CURRICULUM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LWM_LSO_S_CURRICULUM>-SEQNO = 1.
<LWM_LSO_S_CURRICULUM>-ELEM_TYPE = 1.
<LWM_LSO_S_CURRICULUM>-ELEM_ID = 1.
<LWM_LSO_S_CURRICULUM>-ELEM_STEXT = 1.
<LWM_LSO_S_CURRICULUM>-ELEM_TFTEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LWM_LSO_S_CURRICULUM-ELEM_POSITION, sy-vline,
  WA_LWM_LSO_S_CURRICULUM-PLVAR, sy-vline,
  WA_LWM_LSO_S_CURRICULUM-EOTYP, sy-vline,
  WA_LWM_LSO_S_CURRICULUM-EVEID, sy-vline,
  WA_LWM_LSO_S_CURRICULUM-ETEXT, sy-vline,
  WA_LWM_LSO_S_CURRICULUM-EBEGD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LWM_LSO_S_CURRICULUM 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_CURRICULUM 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_CURRICULUM INTO WA_LWM_LSO_S_CURRICULUM.


*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.
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_CURRICULUM_STR, 
SEQNO TYPE STRING,
ELEM_TYPE TYPE STRING,
ELEM_ID TYPE STRING,
ELEM_STEXT TYPE STRING,
ELEM_TFTEXT TYPE STRING,
ELEM_POSITION TYPE STRING,
PLVAR TYPE STRING,
EOTYP TYPE STRING,
EVEID TYPE STRING,
ETEXT TYPE STRING,
EBEGD TYPE STRING,
EENDA TYPE STRING,
ETTYP TYPE STRING,
ETYID TYPE STRING,
EVLNG TYPE STRING,
IKOST TYPE STRING,
IWAER TYPE STRING,
TOTALCOST TYPE STRING,
FREE_SEAT TYPE STRING,
MESSAGE TYPE STRING,
CURR_ID TYPE STRING,
CURRTYPE_ID TYPE STRING,
LOCID TYPE STRING,
EVLOC TYPE STRING,
TITLE TYPE STRING,
COURSETYPE_DESCR TYPE STRING,
COURSETYPE_PRICE TYPE STRING,
COURSETYPE_CURR TYPE STRING,
IS_FAVORITE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LWM_LSO_S_CURRICULUM_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_CURRICULUM_STR-SEQNO sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-ELEM_TYPE sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-ELEM_ID sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-ELEM_STEXT sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-ELEM_TFTEXT sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-ELEM_POSITION sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-PLVAR sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-EOTYP sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-EVEID sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-ETEXT sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-EBEGD sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-EENDA sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-ETTYP sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-ETYID sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-EVLNG sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-IKOST sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-IWAER sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-TOTALCOST sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-FREE_SEAT sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-MESSAGE sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-CURR_ID sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-CURRTYPE_ID sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-LOCID sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-EVLOC sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-TITLE sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-COURSETYPE_DESCR sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-COURSETYPE_PRICE sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-COURSETYPE_CURR sy-vline 
WA_LWM_LSO_S_CURRICULUM_STR-IS_FAVORITE sy-vline      INTO ld_text SEPARATED BY SPACE.

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