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…0380) Fixes #9109. This commit adds a `map` abstraction over a `column_view` of type `LIST<STRUCT<K,V>>`, where `K` and `V` are key and value types. A list column of structs with two members may thus be viewed as a `map` column. `maps_column_view` is to a `LIST<STRUCT<K,V>>` column what `lists_column_view` is to a `LIST` column. The `maps_column_view` abstraction provides methods to fetch lists of keys and values (as `LIST<K>` and `LIST<V>` respectively). It also provides map lookup methods to find the values corresponding to a specified key, for each row in the "map" column. E.g. ```c++ auto input_column = get_list_of_structs_col(); // input_column == [ {1:10, 2:20}, {1:100, 3:300}, {2:2000, 3:3000, 4:4000} ]; auto maps_view = cudf::jni::maps_column_view{input_column->view()}; auto keys = maps_view.keys(); // keys == [ {1,2}, {1,3}, {2,3,4} ]; auto values = maps_view.values(); // values == [ {10,20}, {100, 300}, {2000, 3000, 4000} ]; auto lookup_1 = maps_view.get_values_for( *make_numeric_scalar(1) ); // lookup_1 = [ {10, 100, null} ]; ``` This abstraction should help replace the Java/JNI `map_lookup` and `map_contains` kernels, which only handles `MAP<STRING, STRING>`. Authors: - MithunR (https://github.com/mythrocks) Approvers: - Jason Lowe (https://github.com/jlowe) - AJ Schmidt (https://github.com/ajschmidt8) - Nghia Truong (https://github.com/ttnghia) - Jake Hemstad (https://github.com/jrhemstad) URL: #10380
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| /* | ||
| * Copyright (c) 2022, 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 | ||
| * | ||
| * http://www.apache.org/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 | ||
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| #include <cudf/lists/contains.hpp> | ||
| #include <cudf/lists/lists_column_view.hpp> | ||
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| namespace cudf { | ||
| namespace lists { | ||
| namespace detail { | ||
|
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| /** | ||
| * @copydoc cudf::lists::index_of(cudf::lists_column_view const&, | ||
| * cudf::scalar const&, | ||
| * duplicate_find_option, | ||
| * rmm::mr::device_memory_resource*) | ||
| * @param stream CUDA stream used for device memory operations and kernel launches. | ||
| */ | ||
| std::unique_ptr<column> index_of( | ||
| cudf::lists_column_view const& lists, | ||
| cudf::scalar const& search_key, | ||
| cudf::lists::duplicate_find_option find_option, | ||
| rmm::cuda_stream_view stream, | ||
| rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource()); | ||
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| /** | ||
| * @copydoc cudf::lists::index_of(cudf::lists_column_view const&, | ||
| * cudf::column_view const&, | ||
| * duplicate_find_option, | ||
| * rmm::mr::device_memory_resource*) | ||
| * @param stream CUDA stream used for device memory operations and kernel launches. | ||
| */ | ||
| std::unique_ptr<column> index_of( | ||
| cudf::lists_column_view const& lists, | ||
| cudf::column_view const& search_keys, | ||
| cudf::lists::duplicate_find_option find_option, | ||
| rmm::cuda_stream_view stream, | ||
| rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource()); | ||
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| /** | ||
| * @copydoc cudf::lists::contains(cudf::lists_column_view const&, | ||
| * cudf::scalar const&, | ||
| * rmm::mr::device_memory_resource*) | ||
| * @param stream CUDA stream used for device memory operations and kernel launches. | ||
| */ | ||
| std::unique_ptr<column> contains( | ||
| cudf::lists_column_view const& lists, | ||
| cudf::scalar const& search_key, | ||
| rmm::cuda_stream_view stream, | ||
| rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource()); | ||
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| /** | ||
| * @copydoc cudf::lists::contains(cudf::lists_column_view const&, | ||
| * cudf::column_view const&, | ||
| * rmm::mr::device_memory_resource*) | ||
| * @param stream CUDA stream used for device memory operations and kernel launches. | ||
| */ | ||
| std::unique_ptr<column> contains( | ||
| cudf::lists_column_view const& lists, | ||
| cudf::column_view const& search_keys, | ||
| rmm::cuda_stream_view stream, | ||
| rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource()); | ||
| } // namespace detail | ||
| } // namespace lists | ||
| } // namespace cudf |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,49 @@ | ||
| /* | ||
| * Copyright (c) 2022, 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 | ||
| * | ||
| * http://www.apache.org/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 | ||
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| #include <cudf/lists/extract.hpp> | ||
| #include <cudf/lists/lists_column_view.hpp> | ||
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| namespace cudf { | ||
| namespace lists { | ||
| namespace detail { | ||
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| /** | ||
| * @copydoc cudf::lists::extract_list_element(lists_column_view, size_type, | ||
| * rmm::mr::device_memory_resource*) | ||
| * @param stream CUDA stream used for device memory operations and kernel launches. | ||
| */ | ||
| std::unique_ptr<column> extract_list_element( | ||
| lists_column_view lists_column, | ||
| size_type const index, | ||
| rmm::cuda_stream_view stream, | ||
| rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource()); | ||
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| /** | ||
| * @copydoc cudf::lists::extract_list_element(lists_column_view, column_view const&, | ||
| * rmm::mr::device_memory_resource*) | ||
| * @param stream CUDA stream used for device memory operations and kernel launches. | ||
| */ | ||
| std::unique_ptr<column> extract_list_element( | ||
| lists_column_view lists_column, | ||
| column_view const& indices, | ||
| rmm::cuda_stream_view stream, | ||
| rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource()); | ||
|
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| } // namespace detail | ||
| } // namespace lists | ||
| } // namespace cudf |
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