mirror of https://github.com/facebook/rocksdb.git
48 lines
1.6 KiB
C
48 lines
1.6 KiB
C
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// Copyright (c) 2017-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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#pragma once
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#include <algorithm>
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#include <cstddef>
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#include <memory>
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#include <unordered_map>
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#include "rocksdb/merge_operator.h"
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#include "rocksdb/slice.h"
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#include "rocksdb/utilities/agg_merge.h"
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#include "utilities/cassandra/cassandra_options.h"
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namespace ROCKSDB_NAMESPACE {
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class SumAggregator : public Aggregator {
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public:
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~SumAggregator() override {}
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bool Aggregate(const std::vector<Slice>&, std::string& result) const override;
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bool DoPartialAggregate() const override { return true; }
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};
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class MultipleAggregator : public Aggregator {
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public:
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~MultipleAggregator() override {}
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bool Aggregate(const std::vector<Slice>&, std::string& result) const override;
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bool DoPartialAggregate() const override { return true; }
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};
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class Last3Aggregator : public Aggregator {
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public:
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~Last3Aggregator() override {}
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bool Aggregate(const std::vector<Slice>&, std::string& result) const override;
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};
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class EncodeHelper {
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public:
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static std::string EncodeFuncAndInt(const Slice& function_name,
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int64_t value);
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static std::string EncodeInt(int64_t value);
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static std::string EncodeList(const std::vector<Slice>& list);
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static std::string EncodeFuncAndList(const Slice& function_name,
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const std::vector<Slice>& list);
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};
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} // namespace ROCKSDB_NAMESPACE
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