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