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56 lines
1.3 KiB
C++
56 lines
1.3 KiB
C++
#pragma once
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#include <DB/Core/Block.h>
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#include <DB/Core/Names.h>
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#include <DB/DataStreams/IRowOutputStream.h>
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namespace DB
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{
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class WriteBuffer;
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class Context;
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/** Stream to output data in format "each value in separate row".
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* Usable to show few rows with many columns.
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*/
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class VerticalRowOutputStream : public IRowOutputStream
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{
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public:
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VerticalRowOutputStream(WriteBuffer & ostr_, const Block & sample_, const Context & context);
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void writeField(const IColumn & column, const IDataType & type, size_t row_num) override;
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void writeRowStartDelimiter() override;
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void writeRowBetweenDelimiter() override;
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void flush() override;
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protected:
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virtual void writeValue(const IColumn & column, const IDataType & type, size_t row_num) const;
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WriteBuffer & ostr;
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const Block sample;
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size_t field_number = 0;
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size_t row_number = 0;
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using NamesAndPaddings = std::vector<String>;
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NamesAndPaddings names_and_paddings;
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};
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/** Same but values are printed without escaping.
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*/
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class VerticalRawRowOutputStream final : public VerticalRowOutputStream
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{
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public:
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VerticalRawRowOutputStream(WriteBuffer & ostr_, const Block & sample_, const Context & context)
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: VerticalRowOutputStream(ostr_, sample_, context) {}
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protected:
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void writeValue(const IColumn & column, const IDataType & type, size_t row_num) const override;
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};
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}
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