Hashing

Files
file	hashing.hpp

Functions
std::unique_ptr< column >	cudf::hash (table_view const &input, hash_id hash_function=hash_id::HASH_MURMUR3, std::vector< uint32_t > const &initial_hash={}, uint32_t seed=0, rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
	Computes the hash value of each row in the input set of columns. More...

Detailed Description

Function Documentation

hash()

std::unique_ptr<column> cudf::hash	(	table_view const &	input,
		hash_id	hash_function = hash_id::HASH_MURMUR3,
		std::vector< uint32_t > const &	initial_hash = {},
		uint32_t	seed = 0,
		rmm::mr::device_memory_resource *	mr = rmm::mr::get_current_device_resource()
	)

Computes the hash value of each row in the input set of columns.

Parameters

input	The table of columns to hash
initial_hash	Optional vector of initial hash values for each column. If this vector is empty then each element will be hashed as-is.
mr	Device memory resource used to allocate the returned column's device memory.

Returns

A column where each row is the hash of a column from the input