2011-09-04 21:23:19 +00:00
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#pragma once
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2010-05-21 19:52:50 +00:00
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#include <Poco/SharedPtr.h>
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#include <DB/Core/Defines.h>
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2011-09-04 21:23:19 +00:00
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#include <DB/DataStreams/IProfilingBlockInputStream.h>
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2010-05-21 19:52:50 +00:00
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#include <DB/DataStreams/IRowInputStream.h>
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namespace DB
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{
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using Poco::SharedPtr;
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/** Преобразует поток для чтения данных по строкам в поток для чтения данных по блокам.
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* Наример, для чтения текстового дампа.
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*/
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2011-09-04 21:23:19 +00:00
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class BlockInputStreamFromRowInputStream : public IProfilingBlockInputStream
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2010-05-21 19:52:50 +00:00
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{
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public:
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/** sample_ - пустой блок, который описывает, как интерпретировать значения */
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BlockInputStreamFromRowInputStream(
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IRowInputStream & row_input_,
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const Block & sample_,
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size_t max_block_size_ = DEFAULT_BLOCK_SIZE);
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2011-09-04 21:23:19 +00:00
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Block readImpl();
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String getName() const { return "BlockInputStreamFromRowInputStream"; }
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2010-05-21 19:52:50 +00:00
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private:
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IRowInputStream & row_input;
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const Block & sample;
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size_t max_block_size;
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};
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}
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