ABAP Select data from SAP table V_OIJTCAL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_OIJTCAL
*  INTO TABLE @DATA(IT_V_OIJTCAL2).
*--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_V_OIJTCAL INDEX 1 INTO DATA(WA_V_OIJTCAL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_OIJTCAL>-MANDT = 1.
<V_OIJTCAL>-TCALPROF = 1.
<V_OIJTCAL>-MONDAY = 1.
<V_OIJTCAL>-TUEDAY = 1.
<V_OIJTCAL>-WEDDAY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_OIJTCAL-THRDAY, sy-vline,
  WA_V_OIJTCAL-FRIDAY, sy-vline,
  WA_V_OIJTCAL-SATDAY, sy-vline,
  WA_V_OIJTCAL-SUNDAY, sy-vline,
  WA_V_OIJTCAL-TCALPRTX, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_V_OIJTCAL 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_V_OIJTCAL 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_V_OIJTCAL INTO WA_V_OIJTCAL.


*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_V_OIJTCAL_STR, 
MANDT TYPE STRING,
TCALPROF TYPE STRING,
MONDAY TYPE STRING,
TUEDAY TYPE STRING,
WEDDAY TYPE STRING,
THRDAY TYPE STRING,
FRIDAY TYPE STRING,
SATDAY TYPE STRING,
SUNDAY TYPE STRING,
TCALPRTX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_OIJTCAL_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_V_OIJTCAL_STR-MANDT sy-vline 
WA_V_OIJTCAL_STR-TCALPROF sy-vline 
WA_V_OIJTCAL_STR-MONDAY sy-vline 
WA_V_OIJTCAL_STR-TUEDAY sy-vline 
WA_V_OIJTCAL_STR-WEDDAY sy-vline 
WA_V_OIJTCAL_STR-THRDAY sy-vline 
WA_V_OIJTCAL_STR-FRIDAY sy-vline 
WA_V_OIJTCAL_STR-SATDAY sy-vline 
WA_V_OIJTCAL_STR-SUNDAY sy-vline 
WA_V_OIJTCAL_STR-TCALPRTX sy-vline      INTO ld_text SEPARATED BY SPACE.

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