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a502424c33
* Add write-callback on each row for RowOutputStream * Fix build of new rdkafka library * Poll messages if Kafka outgoing queue is full * Add test * Add test producer-consumer * Truncate delimiter from last row in message
53 lines
1.6 KiB
C++
53 lines
1.6 KiB
C++
#pragma once
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#include <Core/Block.h>
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#include <Formats/FormatSettings.h>
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#include <Processors/Formats/IRowOutputFormat.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 VerticalRowOutputFormat : public IRowOutputFormat
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{
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public:
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VerticalRowOutputFormat(WriteBuffer & out_, const Block & header_, FormatFactory::WriteCallback callback, const FormatSettings & format_settings_);
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String getName() const override { return "VerticalRowOutputFormat"; }
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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 writeSuffix() override;
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void writeMinExtreme(const Columns & columns, size_t row_num) override;
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void writeMaxExtreme(const Columns & columns, size_t row_num) override;
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void writeTotals(const Columns & columns, size_t row_num) override;
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void writeBeforeTotals() override;
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void writeBeforeExtremes() 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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/// For totals and extremes.
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void writeSpecialRow(const Columns & columns, size_t row_num, PortKind port_kind, const char * title);
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const FormatSettings format_settings;
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size_t field_number = 0;
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size_t row_number = 0;
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bool was_totals_written = false;
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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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}
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