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+// file : odb/boost/date-time/mysql/gregorian-mapping.hxx
+// author : Constantin Michael <constantin@codesynthesis.com>
+// author : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : Copyright (c) 2009-2011 Code Synthesis Tools CC
+// license : GNU GPL v2; see accompanying LICENSE file
+
+#ifndef ODB_BOOST_DATE_TIME_MYSQL_GREGORIAN_MAPPING_HXX
+#define ODB_BOOST_DATE_TIME_MYSQL_GREGORIAN_MAPPING_HXX
+
+#include <boost/date_time/gregorian/gregorian_types.hpp>
+
+// By default map boost::gregorian::date to MySQL DATE. We use the
+// NULL value to represent not_a_date_time. In MYSQL "zero" date
+// plays the special value role but this value is not treated as
+// special by gregorian::date.
+//
+#pragma db value(boost::gregorian::date) type("DATE")
+
+#endif // ODB_BOOST_DATE_TIME_MYSQL_GREGORIAN_MAPPING_HXX