ABAP Select data from SAP table YIT_EXAM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM YIT_EXAM
*  INTO TABLE @DATA(IT_YIT_EXAM2).
*--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_YIT_EXAM INDEX 1 INTO DATA(WA_YIT_EXAM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<YIT_EXAM>-IDENT = 1.
<YIT_EXAM>-LANGU = 1.
<YIT_EXAM>-CORE1 = 1.
<YIT_EXAM>-ICOMP = 1.
<YIT_EXAM>-TITEL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_YIT_EXAM-OUSER, sy-vline,
  WA_YIT_EXAM-OCLNT, sy-vline,
  WA_YIT_EXAM-LINK, sy-vline,
  WA_YIT_EXAM-TCLIENT, sy-vline,
  WA_YIT_EXAM-TDID, sy-vline,
  WA_YIT_EXAM-TDSPRAS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_YIT_EXAM 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_YIT_EXAM 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_YIT_EXAM INTO WA_YIT_EXAM.


*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 ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_YIT_EXAM-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_YIT_EXAM-LANGU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field TDSPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_YIT_EXAM-TDSPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_YIT_EXAM-TDSPRAS.
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_YIT_EXAM_STR, 
IDENT TYPE STRING,
LANGU TYPE STRING,
CORE1 TYPE STRING,
ICOMP TYPE STRING,
TITEL TYPE STRING,
OUSER TYPE STRING,
OCLNT TYPE STRING,
LINK TYPE STRING,
TCLIENT TYPE STRING,
TDID TYPE STRING,
TDSPRAS TYPE STRING,
TDNAME TYPE STRING,
COMM1 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_YIT_EXAM_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_YIT_EXAM_STR-IDENT sy-vline 
WA_YIT_EXAM_STR-LANGU sy-vline 
WA_YIT_EXAM_STR-CORE1 sy-vline 
WA_YIT_EXAM_STR-ICOMP sy-vline 
WA_YIT_EXAM_STR-TITEL sy-vline 
WA_YIT_EXAM_STR-OUSER sy-vline 
WA_YIT_EXAM_STR-OCLNT sy-vline 
WA_YIT_EXAM_STR-LINK sy-vline 
WA_YIT_EXAM_STR-TCLIENT sy-vline 
WA_YIT_EXAM_STR-TDID sy-vline 
WA_YIT_EXAM_STR-TDSPRAS sy-vline 
WA_YIT_EXAM_STR-TDNAME sy-vline 
WA_YIT_EXAM_STR-COMM1 sy-vline      INTO ld_text SEPARATED BY SPACE.

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