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Documentation: reference/reference_lua/box_space/len

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	space_object:len()
	Return the number of tuples in the space. If compared with :doc:`count() </reference/reference_lua/box_space/count>`, this method works faster because ``len()`` does not scan the entire space to count the tuples.
	Parameters
	an :ref:`object reference <app_server-object_reference>`
	return
	Number of tuples in the space.
	Possible errors:
	:errcode:`ER_TRANSACTION_CONFLICT` if a transaction conflict is detected in the :ref:`MVCC transaction mode <txn_mode_transaction-manager>`.
	Example:
	tarantool> box.space.tester:len() --- - 2 ...
	Note regarding storage engine: vinyl supports ``len()`` but the result may be approximate. If an exact result is necessary then use :doc:`count() </reference/reference_lua/box_space/count>` or :doc:`pairs():length() </reference/reference_lua/box_space/pairs>`.

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