Extracting

Files
file	datetime.hpp
	DateTime column APIs.

Functions
std::unique_ptr< cudf::column >	cudf::datetime::extract_year (cudf::column_view const &column, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref())
	Extracts year from any datetime type and returns an int16_t cudf::column. More...
std::unique_ptr< cudf::column >	cudf::datetime::extract_month (cudf::column_view const &column, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref())
	Extracts month from any datetime type and returns an int16_t cudf::column. More...
std::unique_ptr< cudf::column >	cudf::datetime::extract_day (cudf::column_view const &column, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref())
	Extracts day from any datetime type and returns an int16_t cudf::column. More...
std::unique_ptr< cudf::column >	cudf::datetime::extract_weekday (cudf::column_view const &column, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref())
	Extracts a weekday from any datetime type and returns an int16_t cudf::column. More...
std::unique_ptr< cudf::column >	cudf::datetime::extract_hour (cudf::column_view const &column, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref())
	Extracts hour from any datetime type and returns an int16_t cudf::column. More...
std::unique_ptr< cudf::column >	cudf::datetime::extract_minute (cudf::column_view const &column, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref())
	Extracts minute from any datetime type and returns an int16_t cudf::column. More...
std::unique_ptr< cudf::column >	cudf::datetime::extract_second (cudf::column_view const &column, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref())
	Extracts second from any datetime type and returns an int16_t cudf::column. More...
std::unique_ptr< cudf::column >	cudf::datetime::extract_millisecond_fraction (cudf::column_view const &column, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref())
	Extracts millisecond fraction from any datetime type and returns an int16_t cudf::column. More...
std::unique_ptr< cudf::column >	cudf::datetime::extract_microsecond_fraction (cudf::column_view const &column, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref())
	Extracts microsecond fraction from any datetime type and returns an int16_t cudf::column. More...
std::unique_ptr< cudf::column >	cudf::datetime::extract_nanosecond_fraction (cudf::column_view const &column, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref())
	Extracts nanosecond fraction from any datetime type and returns an int16_t cudf::column. More...

Detailed Description

Function Documentation

extract_day()

std::unique_ptr<cudf::column> cudf::datetime::extract_day	(	cudf::column_view const &	column,
		rmm::cuda_stream_view	stream = cudf::get_default_stream(),
		rmm::device_async_resource_ref	mr = cudf::get_current_device_resource_ref()
	)

Extracts day from any datetime type and returns an int16_t cudf::column.

Parameters

column	cudf::column_view of the input datetime values
stream	CUDA stream used for device memory operations and kernel launches
mr	Device memory resource used to allocate device memory of the returned column

Returns

cudf::column of the extracted int16_t days

Exceptions

cudf::logic_error

if input column datatype is not TIMESTAMP

extract_hour()

std::unique_ptr<cudf::column> cudf::datetime::extract_hour	(	cudf::column_view const &	column,
		rmm::cuda_stream_view	stream = cudf::get_default_stream(),
		rmm::device_async_resource_ref	mr = cudf::get_current_device_resource_ref()
	)

Extracts hour from any datetime type and returns an int16_t cudf::column.

Parameters

column	cudf::column_view of the input datetime values
stream	CUDA stream used for device memory operations and kernel launches
mr	Device memory resource used to allocate device memory of the returned column

Returns

cudf::column of the extracted int16_t hours

Exceptions

cudf::logic_error

if input column datatype is not TIMESTAMP

extract_microsecond_fraction()

std::unique_ptr<cudf::column> cudf::datetime::extract_microsecond_fraction	(	cudf::column_view const &	column,
		rmm::cuda_stream_view	stream = cudf::get_default_stream(),
		rmm::device_async_resource_ref	mr = cudf::get_current_device_resource_ref()
	)

Extracts microsecond fraction from any datetime type and returns an int16_t cudf::column.

A microsecond fraction is only the 3 digits that make up the microsecond portion of a duration. For example, the microsecond fraction of 1.234567890 seconds is 567.

Parameters

column	cudf::column_view of the input datetime values
stream	CUDA stream used for device memory operations and kernel launches
mr	Device memory resource used to allocate device memory of the returned column

Returns

cudf::column of the extracted int16_t microseconds

Exceptions

cudf::logic_error

if input column datatype is not TIMESTAMP

extract_millisecond_fraction()

std::unique_ptr<cudf::column> cudf::datetime::extract_millisecond_fraction	(	cudf::column_view const &	column,
		rmm::cuda_stream_view	stream = cudf::get_default_stream(),
		rmm::device_async_resource_ref	mr = cudf::get_current_device_resource_ref()
	)

Extracts millisecond fraction from any datetime type and returns an int16_t cudf::column.

A millisecond fraction is only the 3 digits that make up the millisecond portion of a duration. For example, the millisecond fraction of 1.234567890 seconds is 234.

Parameters

column	cudf::column_view of the input datetime values
stream	CUDA stream used for device memory operations and kernel launches
mr	Device memory resource used to allocate device memory of the returned column

Returns

cudf::column of the extracted int16_t milliseconds

Exceptions

cudf::logic_error

if input column datatype is not TIMESTAMP

extract_minute()

std::unique_ptr<cudf::column> cudf::datetime::extract_minute	(	cudf::column_view const &	column,
		rmm::cuda_stream_view	stream = cudf::get_default_stream(),
		rmm::device_async_resource_ref	mr = cudf::get_current_device_resource_ref()
	)

Extracts minute from any datetime type and returns an int16_t cudf::column.

Parameters

column	cudf::column_view of the input datetime values
stream	CUDA stream used for device memory operations and kernel launches
mr	Device memory resource used to allocate device memory of the returned column

Returns

cudf::column of the extracted int16_t minutes

Exceptions

cudf::logic_error

if input column datatype is not TIMESTAMP

extract_month()

std::unique_ptr<cudf::column> cudf::datetime::extract_month	(	cudf::column_view const &	column,
		rmm::cuda_stream_view	stream = cudf::get_default_stream(),
		rmm::device_async_resource_ref	mr = cudf::get_current_device_resource_ref()
	)

Extracts month from any datetime type and returns an int16_t cudf::column.

Parameters

column	cudf::column_view of the input datetime values
stream	CUDA stream used for device memory operations and kernel launches
mr	Device memory resource used to allocate device memory of the returned column

Returns

cudf::column of the extracted int16_t months

Exceptions

cudf::logic_error

if input column datatype is not TIMESTAMP

extract_nanosecond_fraction()

std::unique_ptr<cudf::column> cudf::datetime::extract_nanosecond_fraction	(	cudf::column_view const &	column,
		rmm::cuda_stream_view	stream = cudf::get_default_stream(),
		rmm::device_async_resource_ref	mr = cudf::get_current_device_resource_ref()
	)

Extracts nanosecond fraction from any datetime type and returns an int16_t cudf::column.

A nanosecond fraction is only the 3 digits that make up the nanosecond portion of a duration. For example, the nanosecond fraction of 1.234567890 seconds is 890.

Parameters

column	cudf::column_view of the input datetime values
stream	CUDA stream used for device memory operations and kernel launches
mr	Device memory resource used to allocate device memory of the returned column

Returns

cudf::column of the extracted int16_t nanoseconds

Exceptions

cudf::logic_error

if input column datatype is not TIMESTAMP

extract_second()

std::unique_ptr<cudf::column> cudf::datetime::extract_second	(	cudf::column_view const &	column,
		rmm::cuda_stream_view	stream = cudf::get_default_stream(),
		rmm::device_async_resource_ref	mr = cudf::get_current_device_resource_ref()
	)

Extracts second from any datetime type and returns an int16_t cudf::column.

Parameters

column	cudf::column_view of the input datetime values
stream	CUDA stream used for device memory operations and kernel launches
mr	Device memory resource used to allocate device memory of the returned column

Returns

cudf::column of the extracted int16_t seconds

Exceptions

cudf::logic_error

if input column datatype is not TIMESTAMP

extract_weekday()

std::unique_ptr<cudf::column> cudf::datetime::extract_weekday	(	cudf::column_view const &	column,
		rmm::cuda_stream_view	stream = cudf::get_default_stream(),
		rmm::device_async_resource_ref	mr = cudf::get_current_device_resource_ref()
	)

Extracts a weekday from any datetime type and returns an int16_t cudf::column.

Parameters

column	cudf::column_view of the input datetime values
stream	CUDA stream used for device memory operations and kernel launches
mr	Device memory resource used to allocate device memory of the returned column

Returns

cudf::column of the extracted int16_t days

Exceptions

cudf::logic_error

if input column datatype is not TIMESTAMP

extract_year()

std::unique_ptr<cudf::column> cudf::datetime::extract_year	(	cudf::column_view const &	column,
		rmm::cuda_stream_view	stream = cudf::get_default_stream(),
		rmm::device_async_resource_ref	mr = cudf::get_current_device_resource_ref()
	)

Extracts year from any datetime type and returns an int16_t cudf::column.

Parameters

column	cudf::column_view of the input datetime values
stream	CUDA stream used for device memory operations and kernel launches
mr	Device memory resource used to allocate device memory of the returned column

Returns

cudf::column of the extracted int16_t years

Exceptions

cudf::logic_error

if input column datatype is not TIMESTAMP