ABAP Select data from SAP table PIQ_TIMETABLE_DETAIL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQ_TIMETABLE_DETAIL
*  INTO TABLE @DATA(IT_PIQ_TIMETABLE_DETAIL2).
*--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_PIQ_TIMETABLE_DETAIL INDEX 1 INTO DATA(WA_PIQ_TIMETABLE_DETAIL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQ_TIMETABLE_DETAIL>-COURSE_NAME = 1.
<PIQ_TIMETABLE_DETAIL>-MODULE_ID = 1.
<PIQ_TIMETABLE_DETAIL>-START_DATE = 1.
<PIQ_TIMETABLE_DETAIL>-END_DATE = 1.
<PIQ_TIMETABLE_DETAIL>-START_TIME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQ_TIMETABLE_DETAIL-END_TIME, sy-vline,
  WA_PIQ_TIMETABLE_DETAIL-DURATION, sy-vline,
  WA_PIQ_TIMETABLE_DETAIL-EVENT_ID, sy-vline,
  WA_PIQ_TIMETABLE_DETAIL-EVENT_NAME, sy-vline,
  WA_PIQ_TIMETABLE_DETAIL-CLASS_TYPE, sy-vline,
  WA_PIQ_TIMETABLE_DETAIL-EVENT_DATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQ_TIMETABLE_DETAIL 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_PIQ_TIMETABLE_DETAIL 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_PIQ_TIMETABLE_DETAIL INTO WA_PIQ_TIMETABLE_DETAIL.


*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 CUNIT, internal->external for field CREDIT_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PIQ_TIMETABLE_DETAIL-CREDIT_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_TIMETABLE_DETAIL-CREDIT_UNIT.
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_PIQ_TIMETABLE_DETAIL_STR, 
COURSE_NAME TYPE STRING,
MODULE_ID TYPE STRING,
START_DATE TYPE STRING,
END_DATE TYPE STRING,
START_TIME TYPE STRING,
END_TIME TYPE STRING,
DURATION TYPE STRING,
EVENT_ID TYPE STRING,
EVENT_NAME TYPE STRING,
CLASS_TYPE TYPE STRING,
EVENT_DATE TYPE STRING,
CREDIT_UNIT TYPE STRING,
CREDITS TYPE STRING,
LOCATION TYPE STRING,
ROOM TYPE STRING,
CONTACT_ID TYPE STRING,
INSTRUCTOR TYPE STRING,
BUILDING TYPE STRING,
DEPARTMENT TYPE STRING,
DESIGNATION TYPE STRING,
NOTES TYPE STRING,
CREDITS_TEXT TYPE STRING,
ATTENDEES TYPE STRING,
STATUS TYPE STRING,
STATUS_IND TYPE STRING,
ACADEMICYEAR TYPE STRING,
ACADEMICSESSION TYPE STRING,
PROGRAM_TYPE TYPE STRING,
PROGRAM_STUDY_ID TYPE STRING,
SESSION_DESC TYPE STRING,
YEAR_DESC TYPE STRING,
TEACHING_METHOD TYPE STRING,
RETURN_MESSAGE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQ_TIMETABLE_DETAIL_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_PIQ_TIMETABLE_DETAIL_STR-COURSE_NAME sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-MODULE_ID sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-START_DATE sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-END_DATE sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-START_TIME sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-END_TIME sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-DURATION sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-EVENT_ID sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-EVENT_NAME sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-CLASS_TYPE sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-EVENT_DATE sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-CREDIT_UNIT sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-CREDITS sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-LOCATION sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-ROOM sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-CONTACT_ID sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-INSTRUCTOR sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-BUILDING sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-DEPARTMENT sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-DESIGNATION sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-NOTES sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-CREDITS_TEXT sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-ATTENDEES sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-STATUS sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-STATUS_IND sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-ACADEMICYEAR sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-ACADEMICSESSION sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-PROGRAM_TYPE sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-PROGRAM_STUDY_ID sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-SESSION_DESC sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-YEAR_DESC sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-TEACHING_METHOD sy-vline 
WA_PIQ_TIMETABLE_DETAIL_STR-RETURN_MESSAGE sy-vline      INTO ld_text SEPARATED BY SPACE.

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