2011-09-04 00:22:19 +00:00
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#pragma once
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2011-09-04 01:42:14 +00:00
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#include <DB/Core/SortDescription.h>
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2011-09-04 00:22:19 +00:00
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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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2011-09-04 00:22:19 +00:00
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namespace DB
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{
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/** Сортирует каждый блок по отдельности по значениям указанных столбцов.
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2011-09-04 01:42:14 +00:00
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* На данный момент, используется не очень оптимальный алгоритм.
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2011-09-04 00:22:19 +00:00
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*/
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2011-09-04 21:23:19 +00:00
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class PartialSortingBlockInputStream : public IProfilingBlockInputStream
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2011-09-04 00:22:19 +00:00
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{
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public:
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2011-09-04 01:42:14 +00:00
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PartialSortingBlockInputStream(BlockInputStreamPtr input_, SortDescription & description_)
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2011-09-04 21:23:19 +00:00
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: input(input_), description(description_)
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{
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children.push_back(input);
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}
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2011-09-04 00:22:19 +00:00
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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 "PartialSortingBlockInputStream"; }
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2011-09-04 00:22:19 +00:00
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private:
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BlockInputStreamPtr input;
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2011-09-04 01:42:14 +00:00
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SortDescription description;
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2011-09-04 00:22:19 +00:00
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};
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}
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