reduction.hpp File Reference

APIs for computing reductions and scans over columns. More...

#include <cudf/aggregation.hpp>
#include <cudf/scalar/scalar.hpp>
#include <cudf/utilities/export.hpp>
#include <cudf/utilities/memory_resource.hpp>
#include <optional>

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Namespaces
	cudf
	cuDF interfaces
	cudf::reduction
	Reduction namespace.

Enumerations
enum class	cudf::scan_type : bool { INCLUSIVE , EXCLUSIVE }
	Enum to describe scan operation type.

Functions
std::unique_ptr< scalar >	cudf::reduce (column_view const &col, reduce_aggregation const &agg, data_type output_type, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref())
	Computes the reduction of the values in all rows of a column. More...
std::unique_ptr< scalar >	cudf::reduce (column_view const &col, reduce_aggregation const &agg, data_type output_type, std::optional< std::reference_wrapper< scalar const >> init, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref())
	Computes the reduction of the values in all rows of a column with an initial value. More...
std::unique_ptr< column >	cudf::segmented_reduce (column_view const &segmented_values, device_span< size_type const > offsets, segmented_reduce_aggregation const &agg, data_type output_type, null_policy null_handling, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref())
	Compute reduction of each segment in the input column. More...
std::unique_ptr< column >	cudf::segmented_reduce (column_view const &segmented_values, device_span< size_type const > offsets, segmented_reduce_aggregation const &agg, data_type output_type, null_policy null_handling, std::optional< std::reference_wrapper< scalar const >> init, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref())
	Compute reduction of each segment in the input column with an initial value. Only SUM, PRODUCT, MIN, MAX, ANY, and ALL aggregations are supported. More...
std::unique_ptr< column >	cudf::scan (column_view const &input, scan_aggregation const &agg, scan_type inclusive, null_policy null_handling=null_policy::EXCLUDE, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref())
	Computes the scan of a column. More...
std::pair< std::unique_ptr< scalar >, std::unique_ptr< scalar > >	cudf::minmax (column_view const &col, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref())
	Determines the minimum and maximum values of a column. More...
bool	cudf::reduction::is_valid_aggregation (data_type source, aggregation::Kind kind)
	Indicate if a reduction is supported for a source datatype. More...

Detailed Description

APIs for computing reductions and scans over columns.

Definition in file reduction.hpp.