cudf::struct_scalar Class Reference

An owning class to represent a struct value in device memory. More...

#include <scalar.hpp>

Inheritance diagram for cudf::struct_scalar:

Public Member Functions
	struct_scalar (struct_scalar &&other)=default
	Move constructor for struct_scalar. More...
struct_scalar &	operator= (struct_scalar const &other)=delete
struct_scalar &	operator= (struct_scalar &&other)=delete
	struct_scalar (struct_scalar const &other, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref())
	Construct a new struct scalar object by deep copying another. More...
	struct_scalar (table_view const &data, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref())
	Construct a new struct scalar object from table_view. More...
	struct_scalar (host_span< column_view const > data, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref())
	Construct a new struct scalar object from a host_span of column_views. More...
	struct_scalar (table &&data, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref())
	Construct a new struct scalar object from an existing table in device memory. More...
table_view	view () const
	Returns a non-owning, immutable view to underlying device data. More...
Public Member Functions inherited from cudf::scalar
scalar &	operator= (scalar const &other)=delete
scalar &	operator= (scalar &&other)=delete
data_type	type () const noexcept
	Returns the scalar's logical value type. More...
void	set_valid_async (bool is_valid, rmm::cuda_stream_view stream=cudf::get_default_stream())
	Updates the validity of the value. More...
bool	is_valid (rmm::cuda_stream_view stream=cudf::get_default_stream()) const
	Indicates whether the scalar contains a valid value. More...
bool *	validity_data ()
	Returns a raw pointer to the validity bool in device memory. More...
bool const *	validity_data () const
	Return a const raw pointer to the validity bool in device memory. More...

Additional Inherited Members
Protected Member Functions inherited from cudf::scalar
	scalar (scalar &&other)=default
	Move constructor for scalar. More...
	scalar (scalar const &other, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref())
	Construct a new scalar object by deep copying another. More...
	scalar (data_type type, bool is_valid=false, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref())
	Construct a new scalar object. More...
Protected Attributes inherited from cudf::scalar
data_type	_type {type_id::EMPTY}
	Logical type of value in the scalar.
rmm::device_scalar< bool >	_is_valid
	Device bool signifying validity.

Detailed Description

An owning class to represent a struct value in device memory.

Definition at line 796 of file scalar.hpp.

Constructor & Destructor Documentation

struct_scalar() [1/5]

cudf::struct_scalar::struct_scalar ( struct_scalar &&  other )

default

Move constructor for struct_scalar.

Parameters

other

The other struct_scalar to move from.

struct_scalar() [2/5]

cudf::struct_scalar::struct_scalar	(	struct_scalar const &	other,
		rmm::cuda_stream_view	stream = cudf::get_default_stream(),
		rmm::device_async_resource_ref	mr = cudf::get_current_device_resource_ref()
	)

Construct a new struct scalar object by deep copying another.

Parameters

other	The scalar to copy.
stream	CUDA stream used for device memory operations.
mr	Device memory resource to use for device memory allocation.

struct_scalar() [3/5]

cudf::struct_scalar::struct_scalar	(	table_view const &	data,
		bool	is_valid = true,
		rmm::cuda_stream_view	stream = cudf::get_default_stream(),
		rmm::device_async_resource_ref	mr = cudf::get_current_device_resource_ref()
	)

Construct a new struct scalar object from table_view.

The input table_view is deep-copied.

Parameters

data	The table data to copy.
is_valid	Whether the value held by the scalar is valid.
stream	CUDA stream used for device memory operations.
mr	Device memory resource to use for device memory allocation.

struct_scalar() [4/5]

cudf::struct_scalar::struct_scalar	(	host_span< column_view const >	data,
		bool	is_valid = true,
		rmm::cuda_stream_view	stream = cudf::get_default_stream(),
		rmm::device_async_resource_ref	mr = cudf::get_current_device_resource_ref()
	)

Construct a new struct scalar object from a host_span of column_views.

The input column_views are deep-copied.

Parameters

data	The column_views to copy.
is_valid	Whether the value held by the scalar is valid.
stream	CUDA stream used for device memory operations.
mr	Device memory resource to use for device memory allocation.

struct_scalar() [5/5]

cudf::struct_scalar::struct_scalar	(	table &&	data,
		bool	is_valid = true,
		rmm::cuda_stream_view	stream = cudf::get_default_stream(),
		rmm::device_async_resource_ref	mr = cudf::get_current_device_resource_ref()
	)

Construct a new struct scalar object from an existing table in device memory.

Note that this constructor moves the existing table data into the internal table data; no copies are performed.

Parameters

data	The existing table data to take over.
is_valid	Whether the value held by the scalar is valid.
stream	CUDA stream used for device memory operations.
mr	Device memory resource to use for device memory allocation.

Member Function Documentation

view()

table_view cudf::struct_scalar::view

(

)

const

Returns a non-owning, immutable view to underlying device data.

Returns

A non-owning, immutable view to underlying device data

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

• scalar.hpp