mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-18 05:32:52 +00:00
51 lines
1.6 KiB
C++
51 lines
1.6 KiB
C++
#pragma once
|
|
|
|
#include <Storages/MergeTree/MergeTreeDataPartChecksum.h>
|
|
#include <Core/Types.h>
|
|
#include <IO/WriteBuffer.h>
|
|
#include <IO/ReadBuffer.h>
|
|
#include <IO/Operators.h>
|
|
#include <array>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
class NamesAndTypesList;
|
|
|
|
/// This class provides a compact representation of part metadata (available columns and checksums)
|
|
/// that is intended to be stored in the part znode in ZooKeeper.
|
|
/// It can also be initialized from the legacy format (from the contents of separate <part>/columns
|
|
/// and <part>/checksums znodes).
|
|
class ReplicatedMergeTreePartHeader
|
|
{
|
|
public:
|
|
ReplicatedMergeTreePartHeader() = default;
|
|
|
|
static ReplicatedMergeTreePartHeader fromColumnsAndChecksumsZNodes(
|
|
const String & columns_znode, const String & checksums_znode);
|
|
|
|
static ReplicatedMergeTreePartHeader fromColumnsAndChecksums(
|
|
const NamesAndTypesList & columns, const MergeTreeDataPartChecksums & full_checksums);
|
|
|
|
void read(ReadBuffer & in);
|
|
static ReplicatedMergeTreePartHeader fromString(const String & str);
|
|
|
|
void write(WriteBuffer & out) const;
|
|
String toString() const;
|
|
|
|
const std::array<char, 16> & getColumnsHash() const { return columns_hash; }
|
|
const MinimalisticDataPartChecksums & getChecksums() const { return checksums; }
|
|
|
|
private:
|
|
ReplicatedMergeTreePartHeader(std::array<char, 16> columns_hash_, MinimalisticDataPartChecksums checksums_)
|
|
: columns_hash(std::move(columns_hash_)), checksums(std::move(checksums_))
|
|
{
|
|
}
|
|
|
|
std::array<char, 16> columns_hash;
|
|
MinimalisticDataPartChecksums checksums;
|
|
};
|
|
|
|
}
|