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22e44ced8a
This can be useful to obtain at least some time for the part after mutations, since mutations will change the modification time of all parts. Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
65 lines
2.7 KiB
C++
65 lines
2.7 KiB
C++
#pragma once
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#include "Storages/MergeTree/IDataPartStorage.h"
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#include <Storages/MergeTree/DataPartStorageOnDiskBase.h>
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namespace DB
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{
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/// A storage for data part that stores files on filesystem as is.
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class DataPartStorageOnDiskFull final : public DataPartStorageOnDiskBase
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{
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public:
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DataPartStorageOnDiskFull(VolumePtr volume_, std::string root_path_, std::string part_dir_);
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MergeTreeDataPartStorageType getType() const override { return MergeTreeDataPartStorageType::Full; }
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MutableDataPartStoragePtr getProjection(const std::string & name, bool use_parent_transaction = true) override; // NOLINT
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DataPartStoragePtr getProjection(const std::string & name) const override;
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bool exists() const override;
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bool exists(const std::string & name) const override;
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bool isDirectory(const std::string & name) const override;
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DataPartStorageIteratorPtr iterate() const override;
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Poco::Timestamp getFileLastModified(const String & file_name) const override;
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size_t getFileSize(const std::string & file_name) const override;
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UInt32 getRefCount(const std::string & file_name) const override;
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std::string getRemotePath(const std::string & file_name) const override;
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String getUniqueId() const override;
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std::unique_ptr<ReadBufferFromFileBase> readFile(
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const std::string & name,
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const ReadSettings & settings,
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std::optional<size_t> read_hint,
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std::optional<size_t> file_size) const override;
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void createProjection(const std::string & name) override;
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std::unique_ptr<WriteBufferFromFileBase> writeFile(
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const String & name,
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size_t buf_size,
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WriteMode mode,
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const WriteSettings & settings) override;
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void createFile(const String & name) override;
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void moveFile(const String & from_name, const String & to_name) override;
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void replaceFile(const String & from_name, const String & to_name) override;
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void removeFile(const String & name) override;
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void removeFileIfExists(const String & name) override;
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void createHardLinkFrom(const IDataPartStorage & source, const std::string & from, const std::string & to) override;
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void beginTransaction() override;
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void commitTransaction() override;
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void precommitTransaction() override {}
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bool hasActiveTransaction() const override { return transaction != nullptr; }
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private:
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DataPartStorageOnDiskFull(VolumePtr volume_, std::string root_path_, std::string part_dir_, DiskTransactionPtr transaction_);
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MutableDataPartStoragePtr create(VolumePtr volume_, std::string root_path_, std::string part_dir_, bool initialize_) const override;
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NameSet getActualFileNamesOnDisk(const NameSet & file_names) const override { return file_names; }
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};
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}
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