dbms: more consistent usage of override in Storages [#METR-12524].

dbms/include/DB/Storages/MergeTree/MergeTreeData.h

@@ -606,20 +606,23 @@ public:
 
 	UInt64 getMaxDataPartIndex();
 
-	std::string getTableName() const {
-		throw Exception("Logical error: calling method getTableName of not a table.",	ErrorCodes::LOGICAL_ERROR);
+	std::string getTableName() const
+	{
+		throw Exception("Logical error: calling method getTableName of not a table.", ErrorCodes::LOGICAL_ERROR);
 	}
 
 	const NamesAndTypesList & getColumnsList() const { return *columns; }
 
-	NameAndTypePair getColumn(const String &column_name) const
+	NameAndTypePair getColumn(const String & column_name) const
 	{
-		if (column_name == "_part") return NameAndTypePair("_part", new DataTypeString);
-		if (column_name == "_part_index") return NameAndTypePair("_part_index", new DataTypeUInt64);
+		if (column_name == "_part")
+			return NameAndTypePair("_part", new DataTypeString);
+		if (column_name == "_part_index")
+			return NameAndTypePair("_part_index", new DataTypeUInt64);
 		return getRealColumn(column_name);
 	}
 
-	bool hasColumn(const String &column_name) const
+	bool hasColumn(const String & column_name) const
 	{
 		if (column_name == "_part") return true;
 		if (column_name == "_part_index") return true;

dbms/include/DB/Storages/StorageChunkMerger.h

@@ -27,12 +27,12 @@ public:
 		size_t chunks_to_merge_,			/// Сколько чанков сливать в одну группу.
 		Context & context_);			/// Известные таблицы.
 	
-	std::string getName() const { return "ChunkMerger"; }
-	std::string getTableName() const { return name; }
+	std::string getName() const override { return "ChunkMerger"; }
+	std::string getTableName() const override { return name; }
 	
-	const NamesAndTypesList & getColumnsList() const { return *columns; }
-	NameAndTypePair getColumn(const String &column_name) const;
-	bool hasColumn(const String &column_name) const;
+	const NamesAndTypesList & getColumnsList() const override { return *columns; }
+	NameAndTypePair getColumn(const String & column_name) const override;
+	bool hasColumn(const String & column_name) const override;
 
 	BlockInputStreams read(
 		const Names & column_names,
@@ -40,13 +40,11 @@ public:
 		const Settings & settings,
 		QueryProcessingStage::Enum & processed_stage,
 		size_t max_block_size = DEFAULT_BLOCK_SIZE,
-		unsigned threads = 1);
+		unsigned threads = 1) override;
 
-	void shutdown();
+	void shutdown() override;
 
-	Block getBlockWithVirtualColumns(const Storages & selected_tables) const;
-	
-	~StorageChunkMerger();
+	~StorageChunkMerger() override;
 	
 private:
 	String this_database;
@@ -77,12 +75,14 @@ private:
 		const std::string & destination_name_prefix_,
 		size_t chunks_to_merge_,
 		Context & context_);
-	
+
 	void mergeThread();
 	bool maybeMergeSomething();
 	Storages selectChunksToMerge();
 	bool mergeChunks(const Storages & chunks);
 
+	Block getBlockWithVirtualColumns(const Storages & selected_tables) const;
+
 	typedef std::set<std::string> TableNames;
 	/// Какие таблицы типа Chunks сейчас пишет хоть один ChunkMerger.
 	/// Нужно смотреть, залочив mutex из контекста.

dbms/include/DB/Storages/StorageChunkRef.h

@@ -14,13 +14,13 @@ class StorageChunkRef : public IStorage
 public:
 	static StoragePtr create(const std::string & name_, const Context & context_, const std::string & source_database_name_, const std::string & source_table_name_, bool attach);
 	
-	std::string getName() const { return "ChunkRef"; }
-	std::string getTableName() const { return name; }
+	std::string getName() const override { return "ChunkRef"; }
+	std::string getTableName() const override { return name; }
 	
-	const NamesAndTypesList & getColumnsList() const { return getSource().getColumnsList(); }
+	const NamesAndTypesList & getColumnsList() const override { return getSource().getColumnsList(); }
 	/// В таблице, на которую мы ссылаемся, могут быть виртуальные столбцы.
-	NameAndTypePair getColumn(const String &column_name) const { return getSource().getColumn(column_name); };
-	bool hasColumn(const String &column_name) const { return getSource().hasColumn(column_name); };
+	NameAndTypePair getColumn(const String & column_name) const override { return getSource().getColumn(column_name); };
+	bool hasColumn(const String & column_name) const override { return getSource().hasColumn(column_name); };
 
 	BlockInputStreams read(
 		const Names & column_names,
@@ -28,7 +28,7 @@ public:
 		const Settings & settings,
 		QueryProcessingStage::Enum & processed_stage,
 		size_t max_block_size = DEFAULT_BLOCK_SIZE,
-		unsigned threads = 1);
+		unsigned threads = 1) override;
 
 	ASTPtr getCustomCreateQuery(const Context & context) const;
 	

dbms/include/DB/Storages/StorageChunks.h

@@ -29,7 +29,7 @@ public:
 	void addReference();
 	void removeReference();
 	
-	std::string getName() const { return "Chunks"; }
+	std::string getName() const override { return "Chunks"; }
 	
 	BlockInputStreams read(
 		const Names & column_names,
@@ -37,7 +37,7 @@ public:
 		const Settings & settings,
 		QueryProcessingStage::Enum & processed_stage,
 		size_t max_block_size = DEFAULT_BLOCK_SIZE,
-		unsigned threads = 1);
+		unsigned threads = 1) override;
 
 	BlockInputStreams readFromChunk(
 		const std::string & chunk_name,
@@ -48,27 +48,24 @@ public:
 		size_t max_block_size = DEFAULT_BLOCK_SIZE,
 		unsigned threads = 1);
 
-	NameAndTypePair getColumn(const String &column_name) const;
-	bool hasColumn(const String &column_name) const;
+	NameAndTypePair getColumn(const String & column_name) const override;
+	bool hasColumn(const String & column_name) const override;
 
 	BlockOutputStreamPtr writeToNewChunk(
 		const std::string & chunk_name);
 	
 	/// Если бы запись была разрешена, непонятно, как назвать новый чанк.
-	BlockOutputStreamPtr write(
-		ASTPtr query)
+	BlockOutputStreamPtr write(ASTPtr query) override
 	{
 		throw Exception("Table doesn't support writing", ErrorCodes::NOT_IMPLEMENTED);
 	}
 	
 	/// Переименование испортило бы целостность количества ссылок из таблиц ChunkRef.
-	void rename(const String & new_path_to_db, const String & new_database_name, const String & new_table_name)
+	void rename(const String & new_path_to_db, const String & new_database_name, const String & new_table_name) override
 	{
 		throw Exception("Table doesn't support renaming", ErrorCodes::NOT_IMPLEMENTED);
 	}
 
-	Block getBlockWithVirtualColumns() const;
-
 protected:
 	/// Виртуальная функция из StorageLog
 	/// По номеру засечки получить имя таблицы, из которой идет чтение и номер последней засечки из этой таблицы.
@@ -103,6 +100,8 @@ private:
 	
 	void loadIndex();
 	void appendChunkToIndex(const std::string & chunk_name, size_t mark);
+
+	Block getBlockWithVirtualColumns() const;
 };
 	
 }

dbms/include/DB/Storages/StorageDistributed.h

@@ -40,19 +40,19 @@ public:
 		SharedPtr<Cluster> & owned_cluster_,
 		Context & context_);
 
-	std::string getName() const { return "Distributed"; }
-	std::string getTableName() const { return name; }
-	bool supportsSampling() const { return true; }
-	bool supportsFinal() const { return true; }
-	bool supportsPrewhere() const { return true; }
+	std::string getName() const override { return "Distributed"; }
+	std::string getTableName() const override { return name; }
+	bool supportsSampling() const override { return true; }
+	bool supportsFinal() const override { return true; }
+	bool supportsPrewhere() const override { return true; }
 
-	const NamesAndTypesList & getColumnsList() const { return *columns; }
-	NameAndTypePair getColumn(const String &column_name) const;
-	bool hasColumn(const String &column_name) const;
+	const NamesAndTypesList & getColumnsList() const override { return *columns; }
+	NameAndTypePair getColumn(const String & column_name) const override;
+	bool hasColumn(const String & column_name) const override;
 
-	bool isRemote() const { return true; }
+	bool isRemote() const override { return true; }
 	/// Сохранить временные таблицы, чтобы при следующем вызове метода read переслать их на удаленные серверы.
-	void storeExternalTables(const Tables & tables_) { external_tables = tables_; }
+	void storeExternalTables(const Tables & tables_) override { external_tables = tables_; }
 
 	BlockInputStreams read(
 		const Names & column_names,
@@ -60,15 +60,15 @@ public:
 		const Settings & settings,
 		QueryProcessingStage::Enum & processed_stage,
 		size_t max_block_size = DEFAULT_BLOCK_SIZE,
-		unsigned threads = 1);
+		unsigned threads = 1) override;
 
 	BlockOutputStreamPtr write(ASTPtr query) override;
 
 	void drop() override {}
-	void rename(const String & new_path_to_db, const String & new_database_name, const String & new_table_name) { name = new_table_name; }
+	void rename(const String & new_path_to_db, const String & new_database_name, const String & new_table_name) override { name = new_table_name; }
 	/// в подтаблицах добавлять и удалять столбы нужно вручную
 	/// структура подтаблиц не проверяется
-	void alter(const AlterCommands & params, const String & database_name, const String & table_name, Context & context);
+	void alter(const AlterCommands & params, const String & database_name, const String & table_name, Context & context) override;
 
 	void shutdown() override;
 

dbms/include/DB/Storages/StorageLog.h

@@ -139,12 +139,16 @@ public:
 	  *  (корректность имён и путей не проверяется)
 	  *  состоящую из указанных столбцов; создать файлы, если их нет.
 	  */
-	static StoragePtr create(const std::string & path_, const std::string & name_, NamesAndTypesListPtr columns_, size_t max_compress_block_size_ = DEFAULT_MAX_COMPRESS_BLOCK_SIZE);
+	static StoragePtr create(
+		const std::string & path_,
+		const std::string & name_,
+		NamesAndTypesListPtr columns_,
+		size_t max_compress_block_size_ = DEFAULT_MAX_COMPRESS_BLOCK_SIZE);
 	
-	std::string getName() const { return "Log"; }
-	std::string getTableName() const { return name; }
+	std::string getName() const override { return "Log"; }
+	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const { return *columns; }
+	const NamesAndTypesList & getColumnsList() const override { return *columns; }
 
 	virtual BlockInputStreams read(
 		const Names & column_names,
@@ -152,12 +156,11 @@ public:
 		const Settings & settings,
 		QueryProcessingStage::Enum & processed_stage,
 		size_t max_block_size = DEFAULT_BLOCK_SIZE,
-		unsigned threads = 1);
+		unsigned threads = 1) override;
 
-	BlockOutputStreamPtr write(
-		ASTPtr query);
+	BlockOutputStreamPtr write(ASTPtr query) override;
 
-	void rename(const String & new_path_to_db, const String & new_database_name, const String & new_table_name);
+	void rename(const String & new_path_to_db, const String & new_database_name, const String & new_table_name) override;
 
 	/// Данные столбца
 	struct ColumnData

dbms/include/DB/Storages/StorageMaterializedView.h

@@ -12,15 +12,15 @@ public:
 	static StoragePtr create(const String & table_name_, const String & database_name_,
 		Context & context_,	ASTPtr & query_, NamesAndTypesListPtr columns_, bool attach_);
 
-	std::string getName() const { return "MaterializedView"; }
+	std::string getName() const override { return "MaterializedView"; }
 	std::string getInnerTableName() const { return  ".inner." + table_name; }
 
-	NameAndTypePair getColumn(const String &column_name) const;
-	bool hasColumn(const String &column_name) const;
+	NameAndTypePair getColumn(const String & column_name) const override;
+	bool hasColumn(const String & column_name) const override;
 
-	BlockOutputStreamPtr write(ASTPtr query);
+	BlockOutputStreamPtr write(ASTPtr query) override;
 	void drop() override;
-	bool optimize();
+	bool optimize() override;
 
 	BlockInputStreams read(
 		const Names & column_names,
@@ -28,14 +28,13 @@ public:
 		const Settings & settings,
 		QueryProcessingStage::Enum & processed_stage,
 		size_t max_block_size = DEFAULT_BLOCK_SIZE,
-		unsigned threads = 1);
+		unsigned threads = 1) override;
 
 private:
 	StoragePtr data;
 
 	StorageMaterializedView(const String & table_name_, const String & database_name_,
 		Context & context_,	ASTPtr & query_, NamesAndTypesListPtr columns_,	bool attach_);
-
 };
 
 }

dbms/include/DB/Storages/StorageMemory.h

@@ -64,10 +64,10 @@ friend class MemoryBlockOutputStream;
 public:
 	static StoragePtr create(const std::string & name_, NamesAndTypesListPtr columns_);
 
-	std::string getName() const { return "Memory"; }
-	std::string getTableName() const { return name; }
+	std::string getName() const override { return "Memory"; }
+	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const { return *columns; }
+	const NamesAndTypesList & getColumnsList() const override { return *columns; }
 
 	size_t getSize() const { return data.size(); }
 
@@ -77,13 +77,12 @@ public:
 		const Settings & settings,
 		QueryProcessingStage::Enum & processed_stage,
 		size_t max_block_size = DEFAULT_BLOCK_SIZE,
-		unsigned threads = 1);
+		unsigned threads = 1) override;
 
-	BlockOutputStreamPtr write(
-		ASTPtr query);
+	BlockOutputStreamPtr write(ASTPtr query) override;
 
 	void drop() override;
-	void rename(const String & new_path_to_db, const String & new_database_name, const String & new_table_name) { name = new_table_name; }
+	void rename(const String & new_path_to_db, const String & new_database_name, const String & new_table_name) override { name = new_table_name; }
 
 private:
 	String name;

dbms/include/DB/Storages/StorageMerge.h

@@ -25,16 +25,16 @@ public:
 		const String & table_name_regexp_,	/// Регексп имён таблиц-источников.
 		const Context & context_);			/// Известные таблицы.
 
-	std::string getName() const { return "Merge"; }
-	std::string getTableName() const { return name; }
-	bool supportsSampling() const { return true; }
+	std::string getName() const override { return "Merge"; }
+	std::string getTableName() const override { return name; }
+	bool supportsSampling() const override { return true; }
 
 	/// Проверка откладывается до метода read. Там проверяется поддержка PREWHERE у использующихся таблиц.
-	bool supportsPrewhere() const { return true; }
+	bool supportsPrewhere() const override { return true; }
 
-	const NamesAndTypesList & getColumnsList() const { return *columns; }
-	NameAndTypePair getColumn(const String &column_name) const;
-	bool hasColumn(const String &column_name) const;
+	const NamesAndTypesList & getColumnsList() const override { return *columns; }
+	NameAndTypePair getColumn(const String & column_name) const override;
+	bool hasColumn(const String & column_name) const override;
 
 	BlockInputStreams read(
 		const Names & column_names,
@@ -42,16 +42,15 @@ public:
 		const Settings & settings,
 		QueryProcessingStage::Enum & processed_stage,
 		size_t max_block_size = DEFAULT_BLOCK_SIZE,
-		unsigned threads = 1);
+		unsigned threads = 1) override;
 
 	void drop() override {}
-	void rename(const String & new_path_to_db, const String & new_database_name, const String & new_table_name) { name = new_table_name; }
+	void rename(const String & new_path_to_db, const String & new_database_name, const String & new_table_name) override { name = new_table_name; }
 	
 	/// в подтаблицах добавлять и удалять столбы нужно вручную
 	/// структура подтаблиц не проверяется
-	void alter(const AlterCommands & params, const String & database_name, const String & table_name, Context & context);
+	void alter(const AlterCommands & params, const String & database_name, const String & table_name, Context & context) override;
 
-	Block getBlockWithVirtualColumns(const std::vector<StoragePtr> & selected_tables) const;
 private:
 	String name;
 	NamesAndTypesListPtr columns;
@@ -67,6 +66,8 @@ private:
 		const Context & context_);
 
 	void getSelectedTables(StorageVector & selected_tables) const;
+
+	Block getBlockWithVirtualColumns(const StorageVector & selected_tables) const;
 };
 
 }

dbms/include/DB/Storages/StorageMergeTree.h

@@ -35,27 +35,27 @@ public:
 		const String & sign_column_ = "",
 		const MergeTreeSettings & settings_ = MergeTreeSettings());
 
-	void shutdown();
-	~StorageMergeTree();
+	void shutdown() override;
+	~StorageMergeTree() override;
 
-	std::string getName() const
+	std::string getName() const override
 	{
 		return data.getModePrefix() + "MergeTree";
 	}
 
-	std::string getTableName() const { return table_name; }
-	bool supportsSampling() const { return data.supportsSampling(); }
-	bool supportsFinal() const { return data.supportsFinal(); }
-	bool supportsPrewhere() const { return data.supportsPrewhere(); }
+	std::string getTableName() const override { return table_name; }
+	bool supportsSampling() const override { return data.supportsSampling(); }
+	bool supportsFinal() const override { return data.supportsFinal(); }
+	bool supportsPrewhere() const override { return data.supportsPrewhere(); }
 
-	const NamesAndTypesList & getColumnsList() const { return data.getColumnsList(); }
+	const NamesAndTypesList & getColumnsList() const override { return data.getColumnsList(); }
 
-	NameAndTypePair getColumn(const String &column_name) const
+	NameAndTypePair getColumn(const String & column_name) const override
 	{
 		return data.getColumn(column_name);
 	}
 
-	bool hasColumn(const String &column_name) const
+	bool hasColumn(const String & column_name) const override
 	{
 		return data.hasColumn(column_name);
 	}
@@ -66,22 +66,22 @@ public:
 		const Settings & settings,
 		QueryProcessingStage::Enum & processed_stage,
 		size_t max_block_size = DEFAULT_BLOCK_SIZE,
-		unsigned threads = 1);
+		unsigned threads = 1) override;
 
-	BlockOutputStreamPtr write(ASTPtr query);
+	BlockOutputStreamPtr write(ASTPtr query) override;
 
 	/** Выполнить очередной шаг объединения кусков.
 	  */
-	bool optimize()
+	bool optimize() override
 	{
 		return merge(true);
 	}
 
 	void drop() override;
 
-	void rename(const String & new_path_to_db, const String & new_database_name, const String & new_table_name);
+	void rename(const String & new_path_to_db, const String & new_database_name, const String & new_table_name) override;
 
-	void alter(const AlterCommands & params, const String & database_name, const String & table_name, Context & context);
+	void alter(const AlterCommands & params, const String & database_name, const String & table_name, Context & context) override;
 
 	bool supportsIndexForIn() const override { return true; }
 

dbms/include/DB/Storages/StorageNull.h

@@ -20,10 +20,10 @@ public:
 		return (new StorageNull(name_, columns_))->thisPtr();
 	}
 
-	std::string getName() const { return "Null"; }
-	std::string getTableName() const { return name; }
+	std::string getName() const override { return "Null"; }
+	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const { return *columns; }
+	const NamesAndTypesList & getColumnsList() const override { return *columns; }
 
 	BlockInputStreams read(
 		const Names & column_names,
@@ -31,18 +31,17 @@ public:
 		const Settings & settings,
 		QueryProcessingStage::Enum & processed_stage,
 		size_t max_block_size = DEFAULT_BLOCK_SIZE,
-		unsigned threads = 1)
+		unsigned threads = 1) override
 	{
 		return { new NullBlockInputStream };
 	}
 
-	BlockOutputStreamPtr write(
-		ASTPtr query)
+	BlockOutputStreamPtr write(ASTPtr query) override
 	{
 		return new NullBlockOutputStream;
 	}
 
-	void rename(const String & new_path_to_db, const String & new_database_name, const String & new_table_name) { name = new_table_name; }
+	void rename(const String & new_path_to_db, const String & new_database_name, const String & new_table_name) override { name = new_table_name; }
 
 private:
 	String name;

dbms/include/DB/Storages/StorageReplicatedMergeTree.h

@@ -38,7 +38,7 @@ public:
 		const MergeTreeSettings & settings_ = MergeTreeSettings());
 
 	void shutdown() override;
-	~StorageReplicatedMergeTree();
+	~StorageReplicatedMergeTree() override;
 
 	std::string getName() const override
 	{
@@ -52,13 +52,13 @@ public:
 
 	const NamesAndTypesList & getColumnsList() const override { return data.getColumnsList(); }
 
-	NameAndTypePair getColumn(const String &column_name) const
+	NameAndTypePair getColumn(const String & column_name) const override
 	{
 		if (column_name == "_replicated") return NameAndTypePair("_replicated", new DataTypeUInt8);
 		return data.getColumn(column_name);
 	}
 
-	bool hasColumn(const String &column_name) const
+	bool hasColumn(const String & column_name) const override
 	{
 		if (column_name == "_replicated") return true;
 		return data.hasColumn(column_name);
@@ -85,7 +85,7 @@ public:
 	  */
 	void drop() override;
 
-	void rename(const String & new_path_to_db, const String & new_database_name, const String & new_table_name);
+	void rename(const String & new_path_to_db, const String & new_database_name, const String & new_table_name) override;
 
 	bool supportsIndexForIn() const override { return true; }
 

dbms/include/DB/Storages/StorageSystemDatabases.h

@@ -20,10 +20,10 @@ class StorageSystemDatabases : public IStorage
 public:
 	static StoragePtr create(const std::string & name_, const Context & context_);
 	
-	std::string getName() const { return "SystemDatabases"; }
-	std::string getTableName() const { return name; }
+	std::string getName() const override { return "SystemDatabases"; }
+	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const { return columns; }
+	const NamesAndTypesList & getColumnsList() const override { return columns; }
 
 	BlockInputStreams read(
 		const Names & column_names,
@@ -31,7 +31,7 @@ public:
 		const Settings & settings,
 		QueryProcessingStage::Enum & processed_stage,
 		size_t max_block_size = DEFAULT_BLOCK_SIZE,
-		unsigned threads = 1);
+		unsigned threads = 1) override;
 
 private:
 	const std::string name;

dbms/include/DB/Storages/StorageSystemEvents.h

@@ -19,10 +19,10 @@ class StorageSystemEvents : public IStorage
 public:
 	static StoragePtr create(const std::string & name_);
 	
-	std::string getName() const { return "SystemEvents"; }
-	std::string getTableName() const { return name; }
+	std::string getName() const override { return "SystemEvents"; }
+	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const { return columns; }
+	const NamesAndTypesList & getColumnsList() const override { return columns; }
 
 	BlockInputStreams read(
 		const Names & column_names,
@@ -30,7 +30,7 @@ public:
 		const Settings & settings,
 		QueryProcessingStage::Enum & processed_stage,
 		size_t max_block_size = DEFAULT_BLOCK_SIZE,
-		unsigned threads = 1);
+		unsigned threads = 1) override;
 
 private:
 	const std::string name;

dbms/include/DB/Storages/StorageSystemNumbers.h

@@ -20,10 +20,10 @@ class StorageSystemNumbers : public IStorage
 public:
 	static StoragePtr create(const std::string & name_, bool multithreaded_ = false);
 	
-	std::string getName() const { return "SystemNumbers"; }
-	std::string getTableName() const { return name; }
+	std::string getName() const override { return "SystemNumbers"; }
+	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const { return columns; }
+	const NamesAndTypesList & getColumnsList() const override { return columns; }
 
 	BlockInputStreams read(
 		const Names & column_names,
@@ -31,7 +31,7 @@ public:
 		const Settings & settings,
 		QueryProcessingStage::Enum & processed_stage,
 		size_t max_block_size = DEFAULT_BLOCK_SIZE,
-		unsigned threads = 1);
+		unsigned threads = 1) override;
 
 private:
 	const std::string name;

dbms/include/DB/Storages/StorageSystemOne.h

@@ -17,10 +17,10 @@ class StorageSystemOne : public IStorage
 public:
 	static StoragePtr create(const std::string & name_);
 	
-	std::string getName() const { return "SystemOne"; }
-	std::string getTableName() const { return name; }
+	std::string getName() const override { return "SystemOne"; }
+	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const { return columns; }
+	const NamesAndTypesList & getColumnsList() const override { return columns; }
 
 	BlockInputStreams read(
 		const Names & column_names,
@@ -28,7 +28,7 @@ public:
 		const Settings & settings,
 		QueryProcessingStage::Enum & processed_stage,
 		size_t max_block_size = DEFAULT_BLOCK_SIZE,
-		unsigned threads = 1);
+		unsigned threads = 1) override;
 
 private:
 	const std::string name;

dbms/include/DB/Storages/StorageSystemParts.h

@@ -19,10 +19,10 @@ class StorageSystemParts : public IStorage
 public:
 	static StoragePtr create(const std::string & name_, const Context & context_);
 
-	std::string getName() const { return "SystemParts"; }
-	std::string getTableName() const { return name; }
+	std::string getName() const  override{ return "SystemParts"; }
+	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const { return columns; }
+	const NamesAndTypesList & getColumnsList() const override { return columns; }
 
 	BlockInputStreams read(
 		const Names & column_names,
@@ -30,7 +30,7 @@ public:
 		const Settings & settings,
 		QueryProcessingStage::Enum & processed_stage,
 		size_t max_block_size = DEFAULT_BLOCK_SIZE,
-		unsigned threads = 1);
+		unsigned threads = 1) override;
 
 private:
 	const std::string name;

dbms/include/DB/Storages/StorageSystemProcesses.h

@@ -20,10 +20,10 @@ class StorageSystemProcesses : public IStorage
 public:
 	static StoragePtr create(const std::string & name_, const Context & context_);
 	
-	std::string getName() const { return "SystemProcesses"; }
-	std::string getTableName() const { return name; }
+	std::string getName() const override { return "SystemProcesses"; }
+	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const { return columns; }
+	const NamesAndTypesList & getColumnsList() const override { return columns; }
 
 	BlockInputStreams read(
 		const Names & column_names,
@@ -31,7 +31,7 @@ public:
 		const Settings & settings,
 		QueryProcessingStage::Enum & processed_stage,
 		size_t max_block_size = DEFAULT_BLOCK_SIZE,
-		unsigned threads = 1);
+		unsigned threads = 1) override;
 
 private:
 	const std::string name;

dbms/include/DB/Storages/StorageSystemTables.h

@@ -20,10 +20,10 @@ class StorageSystemTables : public IStorage
 public:
 	static StoragePtr create(const std::string & name_, const Context & context_);
 	
-	std::string getName() const { return "SystemTables"; }
-	std::string getTableName() const { return name; }
+	std::string getName() const override { return "SystemTables"; }
+	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const { return columns; }
+	const NamesAndTypesList & getColumnsList() const override { return columns; }
 
 	BlockInputStreams read(
 		const Names & column_names,
@@ -31,7 +31,7 @@ public:
 		const Settings & settings,
 		QueryProcessingStage::Enum & processed_stage,
 		size_t max_block_size = DEFAULT_BLOCK_SIZE,
-		unsigned threads = 1);
+		unsigned threads = 1) override;
 
 private:
 	const std::string name;

dbms/include/DB/Storages/StorageTinyLog.h

@@ -111,12 +111,17 @@ public:
 	  *  состоящую из указанных столбцов.
 	  * Если не указано attach - создать директорию, если её нет.
 	  */
-	static StoragePtr create(const std::string & path_, const std::string & name_, NamesAndTypesListPtr columns_, bool attach, size_t max_compress_block_size_ = DEFAULT_MAX_COMPRESS_BLOCK_SIZE);
+	static StoragePtr create(
+		const std::string & path_,
+		const std::string & name_,
+		NamesAndTypesListPtr columns_,
+		bool attach,
+		size_t max_compress_block_size_ = DEFAULT_MAX_COMPRESS_BLOCK_SIZE);
 
-	std::string getName() const { return "TinyLog"; }
-	std::string getTableName() const { return name; }
+	std::string getName() const override { return "TinyLog"; }
+	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const { return *columns; }
+	const NamesAndTypesList & getColumnsList() const override { return *columns; }
 
 	BlockInputStreams read(
 		const Names & column_names,
@@ -124,14 +129,13 @@ public:
 		const Settings & settings,
 		QueryProcessingStage::Enum & processed_stage,
 		size_t max_block_size = DEFAULT_BLOCK_SIZE,
-		unsigned threads = 1);
+		unsigned threads = 1) override;
 
-	BlockOutputStreamPtr write(
-		ASTPtr query);
+	BlockOutputStreamPtr write(ASTPtr query) override;
 
 	void drop() override;
 	
-	void rename(const String & new_path_to_db, const String & new_database_name, const String & new_table_name);
+	void rename(const String & new_path_to_db, const String & new_database_name, const String & new_table_name) override;
 
 	bool checkData() const override;
 

dbms/include/DB/Storages/StorageView.h

@@ -13,9 +13,9 @@ public:
 	static StoragePtr create(const String & table_name_, const String & database_name_,
 		Context & context_,	ASTPtr & query_, NamesAndTypesListPtr columns_);
 
-	virtual std::string getName() const { return "View"; }
-	virtual std::string getTableName() const { return table_name; }
-	const NamesAndTypesList & getColumnsList() const { return *columns; }
+	virtual std::string getName() const override { return "View"; }
+	virtual std::string getTableName() const override { return table_name; }
+	const NamesAndTypesList & getColumnsList() const override { return *columns; }
 	DB::ASTPtr getInnerQuery() const { return inner_query.clone(); };
 
 	virtual BlockInputStreams read(
@@ -24,7 +24,7 @@ public:
 		const Settings & settings,
 		QueryProcessingStage::Enum & processed_stage,
 		size_t max_block_size = DEFAULT_BLOCK_SIZE,
-		unsigned threads = 1);
+		unsigned threads = 1) override;
 
 	virtual void drop() override;
 

dbms/src/Storages/StorageChunkMerger.cpp

@@ -39,13 +39,14 @@ StoragePtr StorageChunkMerger::create(
 	return (new StorageChunkMerger(this_database_, name_, columns_, source_database_, table_name_regexp_, destination_name_prefix_, chunks_to_merge_, context_))->thisPtr();
 }
 
-NameAndTypePair StorageChunkMerger::getColumn(const String &column_name) const
+NameAndTypePair StorageChunkMerger::getColumn(const String & column_name) const
 {
-	if (column_name == _table_column_name) return NameAndTypePair(_table_column_name, new DataTypeString);
+	if (column_name == _table_column_name)
+		return NameAndTypePair(_table_column_name, new DataTypeString);
 	return getRealColumn(column_name);
 }
 
-bool StorageChunkMerger::hasColumn(const String &column_name) const
+bool StorageChunkMerger::hasColumn(const String & column_name) const
 {
 	if (column_name == _table_column_name) return true;
 	return hasRealColumn(column_name);

dbms/src/Storages/StorageChunks.cpp

@@ -162,15 +162,17 @@ StorageChunks::StorageChunks(
 	_table_column_name = "_table" + VirtualColumnUtils::chooseSuffix(getColumnsList(), "_table");
 }
 
-NameAndTypePair StorageChunks::getColumn(const String &column_name) const
+NameAndTypePair StorageChunks::getColumn(const String & column_name) const
 {
-	if (column_name == _table_column_name) return NameAndTypePair(_table_column_name, new DataTypeString);
+	if (column_name == _table_column_name)
+		return NameAndTypePair(_table_column_name, new DataTypeString);
 	return getRealColumn(column_name);
 }
 
-bool StorageChunks::hasColumn(const String &column_name) const
+bool StorageChunks::hasColumn(const String & column_name) const
 {
-	if (column_name == _table_column_name) return true;
+	if (column_name == _table_column_name)
+		return true;
 	return hasRealColumn(column_name);
 }