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48 lines
1.3 KiB
C++
48 lines
1.3 KiB
C++
#pragma once
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#include <DB/DataStreams/IBlockOutputStream.h>
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#define PRETTY_FORMAT_DEFAULT_MAX_ROWS 10000
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namespace DB
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{
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/** Выводит результат в виде красивых таблиц.
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*/
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class PrettyBlockOutputStream : public IBlockOutputStream
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{
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public:
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/// no_escapes - не использовать ANSI escape sequences - для отображения в браузере, а не в консоли.
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PrettyBlockOutputStream(WriteBuffer & ostr_, bool no_escapes_ = false, size_t max_rows_ = PRETTY_FORMAT_DEFAULT_MAX_ROWS);
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void write(const Block & block) override;
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void writeSuffix() override;
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void flush() override { ostr.next(); }
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void setTotals(const Block & totals_) override { totals = totals_; }
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void setExtremes(const Block & extremes_) override { extremes = extremes_; }
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protected:
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void writeTotals();
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void writeExtremes();
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typedef std::vector<size_t> Widths_t;
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/// Вычислить видимую (при выводе на консоль с кодировкой UTF-8) ширину значений и имён столбцов.
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void calculateWidths(Block & block, Widths_t & max_widths, Widths_t & name_widths);
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WriteBuffer & ostr;
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size_t max_rows;
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size_t total_rows;
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size_t terminal_width;
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bool no_escapes;
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Block totals;
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Block extremes;
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};
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}
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