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 <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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/** 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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2011-10-24 12:10:59 +00:00
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RowInputStreamPtr row_input_,
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2010-05-21 19:52:50 +00:00
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const Block & sample_,
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2014-04-29 20:22:57 +00:00
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size_t max_block_size_ = DEFAULT_INSERT_BLOCK_SIZE); /// Обычно дамп читается в целях вставки в таблицу.
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2010-05-21 19:52:50 +00:00
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2011-11-06 06:22:52 +00:00
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void readPrefix() { row_input->readPrefix(); }
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void readSuffix() { row_input->readSuffix(); }
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2011-09-04 21:23:19 +00:00
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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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2013-05-03 10:20:53 +00:00
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String getID() const
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{
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std::stringstream res;
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res << this;
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return res.str();
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}
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2012-10-20 02:10:47 +00:00
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protected:
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Block readImpl();
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2010-05-21 19:52:50 +00:00
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private:
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2011-10-24 12:10:59 +00:00
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RowInputStreamPtr row_input;
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2012-10-10 18:32:45 +00:00
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const Block sample;
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2010-05-21 19:52:50 +00:00
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size_t max_block_size;
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2012-12-29 15:41:17 +00:00
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size_t total_rows;
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2010-05-21 19:52:50 +00:00
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};
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}
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