From e21580f9835f0066ecf2fa6792549903899941df Mon Sep 17 00:00:00 2001
From: Andrew McMillan <debian@mcmillan.net.nz>
Date: Tue, 21 Nov 2006 23:58:51 +1300
Subject: [PATCH] Add a function to assist converting timestamps to iCalendar
 format, as at UTC.

---
 dba/caldav_functions.sql | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/dba/caldav_functions.sql b/dba/caldav_functions.sql
index 580fd508..b1072904 100644
--- a/dba/caldav_functions.sql
+++ b/dba/caldav_functions.sql
@@ -250,3 +250,9 @@ BEGIN
   RETURN '''';
 END;
 ' LANGUAGE 'plpgsql' IMMUTABLE STRICT;
+
+
+-- Function to convert a PostgreSQL date into UTC + the format used by iCalendar
+CREATE or REPLACE FUNCTION to_ical_utc( TIMESTAMP WITH TIME ZONE ) RETURNS TEXT AS '
+  SELECT to_char( $1 at time zone ''UTC'', ''YYYYMMDD"T"HH24MISS"Z"'' )
+' LANGUAGE 'sql' IMMUTABLE STRICT;