blob: 5e08bd583fa98fd145ca550a9efc9b90ef251bf6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
// Copyright (c) 2011-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).
// A MergeOperator for RocksDB that implements Merge Sort.
// It is built using the MergeOperator interface. The operator works by taking
// an input which contains one or more merge operands where each operand is a
// list of sorted ints and merges them to form a large sorted list.
#pragma once
#include "rocksdb/merge_operator.h"
#include "rocksdb/slice.h"
namespace ROCKSDB_NAMESPACE {
class SortList : public MergeOperator {
public:
bool FullMergeV2(const MergeOperationInput& merge_in,
MergeOperationOutput* merge_out) const override;
bool PartialMerge(const Slice& /*key*/, const Slice& left_operand,
const Slice& right_operand, std::string* new_value,
Logger* /*logger*/) const override;
bool PartialMergeMulti(const Slice& key,
const std::deque<Slice>& operand_list,
std::string* new_value, Logger* logger) const override;
const char* Name() const override;
void MakeVector(std::vector<int>& operand, Slice slice) const;
private:
std::vector<int> Merge(std::vector<int>& left, std::vector<int>& right) const;
};
} // namespace ROCKSDB_NAMESPACE
|
