cudf::row::primitive::row_hasher< Hash > Class Template Reference

Computes the hash value of a row in the given table. More...

Public Member Functions
	row_hasher (cudf::nullate::DYNAMIC const &has_nulls, table_device_view t, hash_value_type seed=DEFAULT_HASH_SEED)
	Constructs a row_hasher object with a seed value. More...
	row_hasher (cudf::nullate::DYNAMIC const &has_nulls, std::shared_ptr< cudf::experimental::row::equality::preprocessed_table > t, hash_value_type seed=DEFAULT_HASH_SEED)
	Constructs a row_hasher object with a seed value. More...
auto	operator() (size_type row_index) const
	Computes the hash value of the row at row_index in the table More...

Detailed Description

template<template< typename > class Hash = cudf::hashing::detail::default_hash>
class cudf::row::primitive::row_hasher< Hash >

Computes the hash value of a row in the given table.

Template Parameters

Hash	Hash functor to use for hashing elements.

Definition at line 193 of file primitive_row_operators.cuh.

Constructor & Destructor Documentation

row_hasher() [1/2]

template<template< typename > class Hash = cudf::hashing::detail::default_hash>

cudf::row::primitive::row_hasher< Hash >::row_hasher ( cudf::nullate::DYNAMIC const &  has_nulls, table_device_view  t, hash_value_type  seed = DEFAULT_HASH_SEED  )

inline

Constructs a row_hasher object with a seed value.

Parameters

has_nulls	Indicates if the input column contains nulls
t	A table_device_view to hash
seed	A seed value to use for hashing

Definition at line 204 of file primitive_row_operators.cuh.

row_hasher() [2/2]

template<template< typename > class Hash = cudf::hashing::detail::default_hash>

cudf::row::primitive::row_hasher< Hash >::row_hasher ( cudf::nullate::DYNAMIC const &  has_nulls, std::shared_ptr< cudf::experimental::row::equality::preprocessed_table >  t, hash_value_type  seed = DEFAULT_HASH_SEED  )

inline

Constructs a row_hasher object with a seed value.

Parameters

has_nulls	Indicates if the input column contains nulls
t	Preprocessed table to hash
seed	A seed value to use for hashing

Definition at line 218 of file primitive_row_operators.cuh.

Member Function Documentation

operator()()

template<template< typename > class Hash = cudf::hashing::detail::default_hash>

auto cudf::row::primitive::row_hasher< Hash >::operator() ( size_type  row_index ) const

inline

Computes the hash value of the row at row_index in the table

Parameters

row_index

The index of the row in the table to hash

Returns

The hash value of the row at row_index in the table

Definition at line 231 of file primitive_row_operators.cuh.

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The documentation for this class was generated from the following files:

• experimental/row_operators.cuh
• primitive_row_operators.cuh