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56 lines
1.4 KiB
C++
56 lines
1.4 KiB
C++
#pragma once
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#include <Storages/IStorage.h>
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#include <Poco/URI.h>
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#include <common/logger_useful.h>
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#include <ext/shared_ptr_helper.h>
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namespace DB
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{
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/**
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* This class represents table engine for external urls.
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* It sends HTTP GET to server when select is called and
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* HTTP POST when insert is called. In POST request the data is send
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* using Chunked transfer encoding, so server have to support it.
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*/
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class StorageURL : public ext::shared_ptr_helper<StorageURL>, public IStorage
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{
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public:
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String getName() const override
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{
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return "URL";
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}
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String getTableName() const override
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{
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return table_name;
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}
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BlockInputStreams read(const Names & column_names,
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const SelectQueryInfo & query_info,
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const Context & context,
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QueryProcessingStage::Enum & processed_stage,
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size_t max_block_size,
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unsigned num_streams) override;
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BlockOutputStreamPtr write(const ASTPtr & query, const Settings & settings) override;
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void rename(const String & new_path_to_db, const String & new_database_name, const String & new_table_name) override;
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protected:
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StorageURL(const Poco::URI & uri_,
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const std::string & table_name_,
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const String & format_name_,
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const ColumnsDescription & columns_,
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Context & context_);
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private:
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Poco::URI uri;
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String format_name;
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String table_name;
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Context & context_global;
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Logger * log = &Logger::get("StorageURL");
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};
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}
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