59 lines
2.1 KiB
C
59 lines
2.1 KiB
C
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// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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// This API is EXPERIMENTAL.
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#pragma once
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#include <memory>
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#include <vector>
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#include "arrow/acero/visibility.h"
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#include "arrow/compute/api_aggregate.h"
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#include "arrow/compute/test_util_internal.h"
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#include "arrow/compute/type_fwd.h"
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#include "arrow/result.h"
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#include "arrow/type_fwd.h"
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namespace arrow {
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namespace acero {
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namespace aggregate {
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using compute::Aggregate;
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using compute::default_exec_context;
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using compute::ExecContext;
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/// \brief Make the output schema of an aggregate node
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///
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/// The output schema is determined by the aggregation kernels, which may depend on the
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/// ExecContext argument. To guarantee correct results, the same ExecContext argument
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/// should be used in execution.
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///
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/// \param[in] input_schema the schema of the input to the node
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/// \param[in] keys the grouping keys for the aggregation
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/// \param[in] segment_keys the segmenting keys for the aggregation
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/// \param[in] aggregates the aggregates for the aggregation
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/// \param[in] exec_ctx the execution context for the aggregation
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ARROW_ACERO_EXPORT Result<std::shared_ptr<Schema>> MakeOutputSchema(
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const std::shared_ptr<Schema>& input_schema, const std::vector<FieldRef>& keys,
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const std::vector<FieldRef>& segment_keys, const std::vector<Aggregate>& aggregates,
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ExecContext* exec_ctx = default_exec_context());
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} // namespace aggregate
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} // namespace acero
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} // namespace arrow
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