space_object:auto_increment()

object space_object

space_object:auto_increment(tuple)

Insert a new tuple using an auto-increment primary key. The space specified by space_object must have an ‘unsigned’ or ‘integer’ or ‘number’ 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 sequence.

Parameters:	space_object (space_object) – an object reference tuple (table/tuple) – 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, WAL settings.

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']
...