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	# Copyright (C) 2015 The Software Heritage developers			# Copyright (C) 2015 The Software Heritage developers
	# See the AUTHORS file at the top-level directory of this distribution			# See the AUTHORS file at the top-level directory of this distribution
	# License: GNU General Public License version 3, or any later version			# License: GNU General Public License version 3, or any later version
	# See top-level LICENSE file for more information			# See top-level LICENSE file for more information


	from collections import defaultdict			from collections import defaultdict
	import datetime			import datetime
	import functools			import functools
	import itertools			import itertools
	import dateutil.parser			import dateutil.parser
	import psycopg2			import psycopg2

	from . import converters			from . import converters
	from .db import Db			from .db import Db
	from .objstorage import PathSlicingObjStorage			from .exc import StorageDBError
	from .exc import ObjNotFoundError, StorageDBError

	from swh.core.hashutil import ALGORITHMS			from swh.core.hashutil import ALGORITHMS
				from swh.objstorage import PathSlicingObjStorage
				from swh.objstorage.exc import ObjNotFoundError

	# Max block size of contents to return			# Max block size of contents to return
	BULK_BLOCK_CONTENT_LEN_MAX = 10000			BULK_BLOCK_CONTENT_LEN_MAX = 10000


	def db_transaction(meth):			def db_transaction(meth):
	"""decorator to execute Storage methods within DB transactions			"""decorator to execute Storage methods within DB transactions

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