index_object:random()

index_object

Find a random value in the specified index. This method is useful when it's important to get insight into data distribution in an index without having to iterate over the entire data set.

Parameters:

• index_object (index_object) — an object reference.

• seed (number) — an arbitrary non-negative integer

Returns

the tuple for the random key in the index.

Return type

tuple

Complexity factors: Index size, Index type.

Note regarding storage engine: vinyl does not support random().

Example:

 
tarantool> box.space.tester.index.secondary:random(1)---- ['Beta!', 66, 'This is the second tuple!']...