mirror of
https://gitee.com/milvus-io/milvus.git
synced 2026-01-05 10:22:41 +08:00
102 lines
3.6 KiB
C++
102 lines
3.6 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
|
|
// or more contributor license agreements. See the NOTICE file
|
|
// distributed with this work for additional information
|
|
// regarding copyright ownership. The ASF licenses this file
|
|
// to you 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
|
|
|
|
#include <memory>
|
|
|
|
#include "arrow/compute/kernel.h"
|
|
#include "arrow/status.h"
|
|
#include "arrow/util/visibility.h"
|
|
|
|
namespace arrow {
|
|
|
|
class Array;
|
|
|
|
namespace compute {
|
|
|
|
class FunctionContext;
|
|
|
|
struct ARROW_EXPORT TakeOptions {};
|
|
|
|
/// \brief Take from an array of values at indices in another array
|
|
///
|
|
/// The output array will be of the same type as the input values
|
|
/// array, with elements taken from the values array at the given
|
|
/// indices. If an index is null then the taken element will be null.
|
|
///
|
|
/// For example given values = ["a", "b", "c", null, "e", "f"] and
|
|
/// indices = [2, 1, null, 3], the output will be
|
|
/// = [values[2], values[1], null, values[3]]
|
|
/// = ["c", "b", null, null]
|
|
///
|
|
/// \param[in] ctx the FunctionContext
|
|
/// \param[in] values array from which to take
|
|
/// \param[in] indices which values to take
|
|
/// \param[in] options options
|
|
/// \param[out] out resulting array
|
|
ARROW_EXPORT
|
|
Status Take(FunctionContext* ctx, const Array& values, const Array& indices,
|
|
const TakeOptions& options, std::shared_ptr<Array>* out);
|
|
|
|
/// \brief Take from an array of values at indices in another array
|
|
///
|
|
/// \param[in] ctx the FunctionContext
|
|
/// \param[in] values datum from which to take
|
|
/// \param[in] indices which values to take
|
|
/// \param[in] options options
|
|
/// \param[out] out resulting datum
|
|
ARROW_EXPORT
|
|
Status Take(FunctionContext* ctx, const Datum& values, const Datum& indices,
|
|
const TakeOptions& options, Datum* out);
|
|
|
|
/// \brief BinaryKernel implementing Take operation
|
|
class ARROW_EXPORT TakeKernel : public BinaryKernel {
|
|
public:
|
|
explicit TakeKernel(const std::shared_ptr<DataType>& type, TakeOptions options = {})
|
|
: type_(type) {}
|
|
|
|
/// \brief BinaryKernel interface
|
|
///
|
|
/// delegates to subclasses via Take()
|
|
Status Call(FunctionContext* ctx, const Datum& values, const Datum& indices,
|
|
Datum* out) override;
|
|
|
|
/// \brief output type of this kernel (identical to type of values taken)
|
|
std::shared_ptr<DataType> out_type() const override { return type_; }
|
|
|
|
/// \brief factory for TakeKernels
|
|
///
|
|
/// \param[in] value_type constructed TakeKernel will support taking
|
|
/// values of this type
|
|
/// \param[in] index_type constructed TakeKernel will support taking
|
|
/// with indices of this type
|
|
/// \param[out] out created kernel
|
|
static Status Make(const std::shared_ptr<DataType>& value_type,
|
|
const std::shared_ptr<DataType>& index_type,
|
|
std::unique_ptr<TakeKernel>* out);
|
|
|
|
/// \brief single-array implementation
|
|
virtual Status Take(FunctionContext* ctx, const Array& values, const Array& indices,
|
|
std::shared_ptr<Array>* out) = 0;
|
|
|
|
protected:
|
|
std::shared_ptr<DataType> type_;
|
|
};
|
|
} // namespace compute
|
|
} // namespace arrow
|