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51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
#pragma once
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#include <Common/config.h>
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#if USE_HDFS
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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 hdfs files.
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* Read method is supported for now.
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*/
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class StorageHDFS final : public ext::shared_ptr_helper<StorageHDFS>, public IStorage
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{
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friend struct ext::shared_ptr_helper<StorageHDFS>;
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public:
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String getName() const override { return "HDFS"; }
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Pipes 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 Context & context) override;
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protected:
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StorageHDFS(const String & uri_,
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const StorageID & table_id_,
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const String & format_name_,
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const ColumnsDescription & columns_,
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const ConstraintsDescription & constraints_,
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Context & context_,
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const String & compression_method_);
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private:
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String uri;
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String format_name;
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Context & context;
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String compression_method;
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Logger * log = &Logger::get("StorageHDFS");
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};
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}
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#endif
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