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Documentation: reference/reference_lua/box_space/auto_increment

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	space_object:auto_increment()
	Insert a new tuple using an auto-increment primary key. The space specified by space_object must have an :ref:`'unsigned' or 'integer' or 'number' <index-box_indexed-field-types>` primary key index of type ``TREE``. The primary-key field will be incremented before the insert.
	Since version 1.7.5 this method is deprecated – it is better to use a :ref:`sequence <index-box_sequence>`.
	Parameters
	an :ref:`object reference <app_server-object_reference>`
	tuple's fields, other than the primary-key field
	return
	the inserted tuple.
	rtype
	tuple
	Complexity factors: Index size, Index type, Number of indexes accessed, :ref:`WAL settings <cfg_binary_logging_snapshots-rows_per_wal>`.
	Possible errors:
	index has wrong type;
	primary-key indexed field is not a number.
	Example:
	tarantool> box.space.tester:auto_increment{'Fld#1', 'Fld#2'} --- - [1, 'Fld#1', 'Fld#2'] ... tarantool> box.space.tester:auto_increment{'Fld#3'} --- - [2, 'Fld#3'] ...

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