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33 lines
950 B
C++
33 lines
950 B
C++
#pragma once
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#include <DB/DataStreams/IBlockOutputStream.h>
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#include <DB/DataStreams/IRowOutputStream.h>
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namespace DB
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{
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/** Преобразует поток для записи данных по строкам в поток для записи данных по блокам.
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* Наример, для записи текстового дампа.
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*/
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class BlockOutputStreamFromRowOutputStream : public IBlockOutputStream
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{
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public:
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BlockOutputStreamFromRowOutputStream(RowOutputStreamPtr row_output_);
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void write(const Block & block) override;
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void writePrefix() override { row_output->writePrefix(); }
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void writeSuffix() override { row_output->writeSuffix(); }
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void flush() override { row_output->flush(); }
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void setRowsBeforeLimit(size_t rows_before_limit) override;
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void setTotals(const Block & totals) override;
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void setExtremes(const Block & extremes) override;
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private:
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RowOutputStreamPtr row_output;
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bool first_row;
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};
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}
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