ABAP Select data from SAP table PCALENDARKEYDATE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PCALENDARKEYDATE
*  INTO TABLE @DATA(IT_PCALENDARKEYDATE2).
*--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_PCALENDARKEYDATE INDEX 1 INTO DATA(WA_PCALENDARKEYDATE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PCALENDARKEYDATE>-KEYDATE = 1.
<PCALENDARKEYDATE>-CALENDARDAY = 1.
<PCALENDARKEYDATE>-CALENDARYEAR = 1.
<PCALENDARKEYDATE>-CALENDARQUARTER = 1.
<PCALENDARKEYDATE>-CALENDARMONTH = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PCALENDARKEYDATE-YEARMONTH, sy-vline,
  WA_PCALENDARKEYDATE-WEEKDAY, sy-vline,
  WA_PCALENDARKEYDATE-CALENDARDAYOFYEAR, sy-vline,
  WA_PCALENDARKEYDATE-CALENDARWEEK, sy-vline,
  WA_PCALENDARKEYDATE-FIRSTDAYOFWEEKDATE, sy-vline,
  WA_PCALENDARKEYDATE-FIRSTDAYOFMONTHDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PCALENDARKEYDATE 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_PCALENDARKEYDATE 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_PCALENDARKEYDATE INTO WA_PCALENDARKEYDATE.


*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_PCALENDARKEYDATE_STR, 
KEYDATE TYPE STRING,
CALENDARDAY TYPE STRING,
CALENDARYEAR TYPE STRING,
CALENDARQUARTER TYPE STRING,
CALENDARMONTH TYPE STRING,
YEARMONTH TYPE STRING,
WEEKDAY TYPE STRING,
CALENDARDAYOFYEAR TYPE STRING,
CALENDARWEEK TYPE STRING,
FIRSTDAYOFWEEKDATE TYPE STRING,
FIRSTDAYOFMONTHDATE TYPE STRING,
CREDITLINEREPORTINGPERIOD TYPE STRING,
CON_DAY TYPE STRING,
CON_WEEK_START TYPE STRING,
CON_WEEK_END TYPE STRING,
CON_MONTH_START TYPE STRING,
CON_MONTH_END TYPE STRING,
CON_QUARTER_START TYPE STRING,
CON_QUARTER_END TYPE STRING,
CON_YEAR_START TYPE STRING,
CON_YEAR_END TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PCALENDARKEYDATE_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_PCALENDARKEYDATE_STR-KEYDATE sy-vline 
WA_PCALENDARKEYDATE_STR-CALENDARDAY sy-vline 
WA_PCALENDARKEYDATE_STR-CALENDARYEAR sy-vline 
WA_PCALENDARKEYDATE_STR-CALENDARQUARTER sy-vline 
WA_PCALENDARKEYDATE_STR-CALENDARMONTH sy-vline 
WA_PCALENDARKEYDATE_STR-YEARMONTH sy-vline 
WA_PCALENDARKEYDATE_STR-WEEKDAY sy-vline 
WA_PCALENDARKEYDATE_STR-CALENDARDAYOFYEAR sy-vline 
WA_PCALENDARKEYDATE_STR-CALENDARWEEK sy-vline 
WA_PCALENDARKEYDATE_STR-FIRSTDAYOFWEEKDATE sy-vline 
WA_PCALENDARKEYDATE_STR-FIRSTDAYOFMONTHDATE sy-vline 
WA_PCALENDARKEYDATE_STR-CREDITLINEREPORTINGPERIOD sy-vline 
WA_PCALENDARKEYDATE_STR-CON_DAY sy-vline 
WA_PCALENDARKEYDATE_STR-CON_WEEK_START sy-vline 
WA_PCALENDARKEYDATE_STR-CON_WEEK_END sy-vline 
WA_PCALENDARKEYDATE_STR-CON_MONTH_START sy-vline 
WA_PCALENDARKEYDATE_STR-CON_MONTH_END sy-vline 
WA_PCALENDARKEYDATE_STR-CON_QUARTER_START sy-vline 
WA_PCALENDARKEYDATE_STR-CON_QUARTER_END sy-vline 
WA_PCALENDARKEYDATE_STR-CON_YEAR_START sy-vline 
WA_PCALENDARKEYDATE_STR-CON_YEAR_END sy-vline      INTO ld_text SEPARATED BY SPACE.

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