transform.hpp

前往此文件的文档。

/*
 * Copyright (c) 2019-2025, NVIDIA CORPORATION.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * https://apache.ac.cn/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#pragma once

#include <cudf/ast/expressions.hpp>
#include <cudf/types.hpp>
#include <cudf/utilities/export.hpp>
#include <cudf/utilities/memory_resource.hpp>

#include <memory>

namespace CUDF_EXPORT cudf {
std::unique_ptr<column> transform(
 std::vector<column_view> const& inputs,
 std::string const& transform_udf,
 data_type output_type,
 bool is_ptx,
 rmm::cuda_stream_view stream = cudf::get_default_stream(),
 rmm::device_async_resource_ref mr = cudf::get_current_device_resource_ref());

std::pair<std::unique_ptr<rmm::device_buffer>, size_type> nans_to_nulls(
 column_view const& input,
 rmm::cuda_stream_view stream = cudf::get_default_stream(),
 rmm::device_async_resource_ref mr = cudf::get_current_device_resource_ref());

std::unique_ptr<column> compute_column(
 table_view const& table,
 ast::expression const& expr,
 rmm::cuda_stream_view stream = cudf::get_default_stream(),
 rmm::device_async_resource_ref mr = cudf::get_current_device_resource_ref());

std::pair<std::unique_ptr<rmm::device_buffer>, cudf::size_type> bools_to_mask(
 column_view const& input,
 rmm::cuda_stream_view stream = cudf::get_default_stream(),
 rmm::device_async_resource_ref mr = cudf::get_current_device_resource_ref());

std::pair<std::unique_ptr<cudf::table>, std::unique_ptr<cudf::column>> encode(
 cudf::table_view const& input,
 rmm::cuda_stream_view stream = cudf::get_default_stream(),
 rmm::device_async_resource_ref mr = cudf::get_current_device_resource_ref());

std::pair<std::unique_ptr<column>, table_view> one_hot_encode(
 column_view const& input,
 column_view const& categories,
 rmm::cuda_stream_view stream = cudf::get_default_stream(),
 rmm::device_async_resource_ref mr = cudf::get_current_device_resource_ref());

std::unique_ptr<column> mask_to_bools(
 bitmask_type const* bitmask,
 size_type begin_bit,
 size_type end_bit,
 rmm::cuda_stream_view stream = cudf::get_default_stream(),
 rmm::device_async_resource_ref mr = cudf::get_current_device_resource_ref());

std::unique_ptr<column> row_bit_count(
 table_view const& t,
 rmm::cuda_stream_view stream = cudf::get_default_stream(),
 rmm::device_async_resource_ref mr = cudf::get_current_device_resource_ref());

std::unique_ptr<column> segmented_row_bit_count(
 table_view const& t,
 size_type segment_length,
 rmm::cuda_stream_view stream = cudf::get_default_stream(),
 rmm::device_async_resource_ref mr = cudf::get_current_device_resource_ref());
 // end of group
} // namespace CUDF_EXPORT cudf