expressions.py
4092dd839327maint-2.1

expressions.py
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			# -- coding: utf-8 --
			#
			# This file is part of Invenio.
			# Copyright (C) 2011, 2012, 2013 CERN.
			#
			# Invenio is free software; you can redistribute it and/or
			# modify it under the terms of the GNU General Public License as
			# published by the Free Software Foundation; either version 2 of the
			# License, or (at your option) any later version.
			#
			# Invenio is distributed in the hope that it will be useful, but
			# WITHOUT ANY WARRANTY; without even the implied warranty of
			# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
			# General Public License for more details.
			#
			# You should have received a copy of the GNU General Public License
			# along with Invenio; if not, write to the Free Software Foundation, Inc.,
			# 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
			"""
			invenio.ext.sqlalchemy.expressions
			----------------------------------

			Implements various custom ORM expressions.
			"""

			from sqlalchemy.ext.compiler import compiles
			from sqlalchemy.sql.expression import FunctionElement


			class AsBINARY(FunctionElement):
			name = 'AsBINARY'


			@compiles(AsBINARY)
			def compile(element, compiler, **kw):
			return "BINARY %s" % compiler.process(element.clauses)