2011-10-31 17:55:06 +00:00
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#pragma once
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2016-05-28 10:15:36 +00:00
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#include <mutex>
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2012-11-30 04:28:13 +00:00
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2016-08-30 19:27:15 +00:00
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#include <ext/shared_ptr_helper.hpp>
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2016-08-26 21:25:05 +00:00
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2011-10-31 17:55:06 +00:00
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#include <DB/Core/NamesAndTypes.h>
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#include <DB/Storages/IStorage.h>
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2014-03-19 10:45:13 +00:00
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#include <DB/DataStreams/IBlockOutputStream.h>
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2011-10-31 17:55:06 +00:00
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namespace DB
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{
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class StorageMemory;
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/** Реализует хранилище в оперативке.
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* Подходит для временных данных.
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* В нём не поддерживаются ключи.
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* Данные хранятся в виде набора блоков и никуда дополнительно не сохраняются.
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*/
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2016-08-30 19:27:15 +00:00
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class StorageMemory : private ext::shared_ptr_helper<StorageMemory>, public IStorage
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2011-10-31 17:55:06 +00:00
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{
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2016-08-30 19:27:15 +00:00
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friend class ext::shared_ptr_helper<StorageMemory>;
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2011-10-31 17:55:06 +00:00
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friend class MemoryBlockInputStream;
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friend class MemoryBlockOutputStream;
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public:
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2014-09-30 03:08:47 +00:00
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static StoragePtr create(
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const std::string & name_,
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NamesAndTypesListPtr columns_);
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static StoragePtr create(
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const std::string & name_,
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NamesAndTypesListPtr columns_,
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2014-10-03 15:30:10 +00:00
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const NamesAndTypesList & materialized_columns_,
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2014-09-30 03:08:47 +00:00
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const NamesAndTypesList & alias_columns_,
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const ColumnDefaults & column_defaults_);
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2011-10-31 17:55:06 +00:00
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2014-10-03 17:55:36 +00:00
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std::string getName() const override { return "Memory"; }
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std::string getTableName() const override { return name; }
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2011-10-31 17:55:06 +00:00
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2014-10-10 15:45:43 +00:00
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const NamesAndTypesList & getColumnsListImpl() const override { return *columns; }
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2011-10-31 17:55:06 +00:00
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2014-03-19 15:07:29 +00:00
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size_t getSize() const { return data.size(); }
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2012-01-09 19:20:48 +00:00
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BlockInputStreams read(
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2011-10-31 17:55:06 +00:00
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const Names & column_names,
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ASTPtr query,
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2014-12-17 11:53:17 +00:00
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const Context & context,
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2013-02-01 19:02:04 +00:00
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const Settings & settings,
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2012-05-22 18:32:45 +00:00
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QueryProcessingStage::Enum & processed_stage,
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2012-01-09 19:20:48 +00:00
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size_t max_block_size = DEFAULT_BLOCK_SIZE,
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unsigned threads = 1) override;
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2011-10-31 17:55:06 +00:00
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2015-09-10 20:43:42 +00:00
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BlockOutputStreamPtr write(ASTPtr query, const Settings & settings) override;
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2011-10-31 17:55:06 +00:00
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2014-03-20 13:28:49 +00:00
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void drop() override;
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2014-10-03 17:55:36 +00:00
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void rename(const String & new_path_to_db, const String & new_database_name, const String & new_table_name) override { name = new_table_name; }
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2011-11-05 23:31:19 +00:00
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2011-10-31 17:55:06 +00:00
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private:
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2012-06-18 06:19:13 +00:00
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String name;
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2011-11-01 17:12:11 +00:00
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NamesAndTypesListPtr columns;
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2011-10-31 17:55:06 +00:00
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2012-11-30 04:28:13 +00:00
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/// Сами данные. list - чтобы при вставке в конец, существующие итераторы не инвалидировались.
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BlocksList data;
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2016-05-28 10:15:36 +00:00
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std::mutex mutex;
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2014-10-26 00:01:36 +00:00
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2014-09-30 03:08:47 +00:00
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StorageMemory(
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const std::string & name_,
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NamesAndTypesListPtr columns_);
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StorageMemory(
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const std::string & name_,
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NamesAndTypesListPtr columns_,
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2014-10-03 15:30:10 +00:00
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const NamesAndTypesList & materialized_columns_,
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2014-09-30 03:08:47 +00:00
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const NamesAndTypesList & alias_columns_,
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const ColumnDefaults & column_defaults_);
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2011-10-31 17:55:06 +00:00
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};
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}
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