ABAP Select data from SAP table CURRCALENDARDATE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CURRCALENDARDATE
*  INTO TABLE @DATA(IT_CURRCALENDARDATE2).
*--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_CURRCALENDARDATE INDEX 1 INTO DATA(WA_CURRCALENDARDATE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CURRCALENDARDATE>-CALENDARDATE = 1.
<CURRCALENDARDATE>-DATEFUNCTIONTYPE = 1.
<CURRCALENDARDATE>-DATEFUNCTIONGRANULARITY = 1.
<CURRCALENDARDATE>-DATEFUNCTIONCALENDARTYPE = 1.
<CURRCALENDARDATE>-DATEFUNCTIONSTARTPOINT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CURRCALENDARDATE-DATEFUNCTIONSTARTOFFSETVALUE, sy-vline,
  WA_CURRCALENDARDATE-DATEFUNCSTARTRELATIVEOFFSET, sy-vline,
  WA_CURRCALENDARDATE-DATEFUNCTIONSTARTOFFSETUNIT, sy-vline,
  WA_CURRCALENDARDATE-DATEFUNCTIONSTARTRELOFFSETUNIT, sy-vline,
  WA_CURRCALENDARDATE-DATEFUNCTIONSTARTYEAROFFSET, sy-vline,
  WA_CURRCALENDARDATE-DATEFUNCTIONSTARTFIXEDDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CURRCALENDARDATE 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_CURRCALENDARDATE 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_CURRCALENDARDATE INTO WA_CURRCALENDARDATE.


*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_CURRCALENDARDATE_STR, 
CALENDARDATE TYPE STRING,
DATEFUNCTIONTYPE TYPE STRING,
DATEFUNCTIONGRANULARITY TYPE STRING,
DATEFUNCTIONCALENDARTYPE TYPE STRING,
DATEFUNCTIONSTARTPOINT TYPE STRING,
DATEFUNCTIONSTARTOFFSETVALUE TYPE STRING,
DATEFUNCSTARTRELATIVEOFFSET TYPE STRING,
DATEFUNCTIONSTARTOFFSETUNIT TYPE STRING,
DATEFUNCTIONSTARTRELOFFSETUNIT TYPE STRING,
DATEFUNCTIONSTARTYEAROFFSET TYPE STRING,
DATEFUNCTIONSTARTFIXEDDATE TYPE STRING,
DATEFUNCTIONENDPOINT TYPE STRING,
DATEFUNCTIONENDOFFSETVALUE TYPE STRING,
DATEFUNCTIONENDRELOFFSET TYPE STRING,
DATEFUNCTIONENDOFFSETUNIT TYPE STRING,
DATEFUNCTIONENDRELOFFSETUNIT TYPE STRING,
DATEFUNCTIONENDYEAROFFSET TYPE STRING,
DATEFUNCTIONENDFIXEDDATE TYPE STRING,
CALENDARDAY TYPE STRING,
CALENDARDAYOFYEAR TYPE STRING,
CALENDARMONTH TYPE STRING,
CALENDARQUARTER TYPE STRING,
CALENDARWEEK TYPE STRING,
CALENDARYEAR TYPE STRING,
FIRSTDAYOFMONTHDATE TYPE STRING,
FIRSTDAYOFWEEKDATE TYPE STRING,
WEEKDAY TYPE STRING,
YEARDAY TYPE STRING,
YEARMONTH TYPE STRING,
YEARQUARTER TYPE STRING,
YEARWEEK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CURRCALENDARDATE_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_CURRCALENDARDATE_STR-CALENDARDATE sy-vline 
WA_CURRCALENDARDATE_STR-DATEFUNCTIONTYPE sy-vline 
WA_CURRCALENDARDATE_STR-DATEFUNCTIONGRANULARITY sy-vline 
WA_CURRCALENDARDATE_STR-DATEFUNCTIONCALENDARTYPE sy-vline 
WA_CURRCALENDARDATE_STR-DATEFUNCTIONSTARTPOINT sy-vline 
WA_CURRCALENDARDATE_STR-DATEFUNCTIONSTARTOFFSETVALUE sy-vline 
WA_CURRCALENDARDATE_STR-DATEFUNCSTARTRELATIVEOFFSET sy-vline 
WA_CURRCALENDARDATE_STR-DATEFUNCTIONSTARTOFFSETUNIT sy-vline 
WA_CURRCALENDARDATE_STR-DATEFUNCTIONSTARTRELOFFSETUNIT sy-vline 
WA_CURRCALENDARDATE_STR-DATEFUNCTIONSTARTYEAROFFSET sy-vline 
WA_CURRCALENDARDATE_STR-DATEFUNCTIONSTARTFIXEDDATE sy-vline 
WA_CURRCALENDARDATE_STR-DATEFUNCTIONENDPOINT sy-vline 
WA_CURRCALENDARDATE_STR-DATEFUNCTIONENDOFFSETVALUE sy-vline 
WA_CURRCALENDARDATE_STR-DATEFUNCTIONENDRELOFFSET sy-vline 
WA_CURRCALENDARDATE_STR-DATEFUNCTIONENDOFFSETUNIT sy-vline 
WA_CURRCALENDARDATE_STR-DATEFUNCTIONENDRELOFFSETUNIT sy-vline 
WA_CURRCALENDARDATE_STR-DATEFUNCTIONENDYEAROFFSET sy-vline 
WA_CURRCALENDARDATE_STR-DATEFUNCTIONENDFIXEDDATE sy-vline 
WA_CURRCALENDARDATE_STR-CALENDARDAY sy-vline 
WA_CURRCALENDARDATE_STR-CALENDARDAYOFYEAR sy-vline 
WA_CURRCALENDARDATE_STR-CALENDARMONTH sy-vline 
WA_CURRCALENDARDATE_STR-CALENDARQUARTER sy-vline 
WA_CURRCALENDARDATE_STR-CALENDARWEEK sy-vline 
WA_CURRCALENDARDATE_STR-CALENDARYEAR sy-vline 
WA_CURRCALENDARDATE_STR-FIRSTDAYOFMONTHDATE sy-vline 
WA_CURRCALENDARDATE_STR-FIRSTDAYOFWEEKDATE sy-vline 
WA_CURRCALENDARDATE_STR-WEEKDAY sy-vline 
WA_CURRCALENDARDATE_STR-YEARDAY sy-vline 
WA_CURRCALENDARDATE_STR-YEARMONTH sy-vline 
WA_CURRCALENDARDATE_STR-YEARQUARTER sy-vline 
WA_CURRCALENDARDATE_STR-YEARWEEK sy-vline      INTO ld_text SEPARATED BY SPACE.

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