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44 lines
976 B
C++
44 lines
976 B
C++
#pragma once
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#include <DB/Core/Block.h>
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#include <DB/DataStreams/IBlockOutputStream.h>
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namespace DB
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{
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class Connection;
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class ReadBuffer;
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struct Settings;
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/** Allow to execute INSERT query on remote server and send data for it.
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*/
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class RemoteBlockOutputStream : public IBlockOutputStream
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{
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public:
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RemoteBlockOutputStream(Connection & connection_, const String & query_, const Settings * settings_ = nullptr);
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/// You can call this method after 'writePrefix', to get table required structure. (You must send data with that structure).
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Block getSampleBlock() const
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{
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return sample_block;
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}
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void writePrefix() override;
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void write(const Block & block) override;
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void writeSuffix() override;
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/// Send pre-serialized and possibly pre-compressed block of data, that will be read from 'input'.
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void writePrepared(ReadBuffer & input, size_t size = 0);
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private:
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Connection & connection;
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String query;
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const Settings * settings;
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Block sample_block;
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};
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}
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