testing_project

Documentation: reference/reference_lua/box_index/update

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	index_object:update()
	Update a tuple.
	Same as :ref:`box.space...update() <box_space-update>`, but key is searched in this index instead of primary key. This index should be unique.
	Parameters
	an :ref:`object reference <app_server-object_reference>`.
	values to be matched against the index key
	operation type represented in string
	what field the operation will apply to. The field number can be negative, meaning the position from the end of tuple. (#tuple + negative field number + 1)
	what value will be applied
	return
	the updated tuple
	nil if the key is not found
	rtype
	tuple or nil
	Since Tarantool 2.3 a tuple can also be updated via :ref:`JSON paths<json_paths-module>`.

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