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34 lines
906 B
C++
34 lines
906 B
C++
#pragma once
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#include <DB/DataStreams/IBlockOutputStream.h>
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#define PRETTY_FORMAT_DEFAULT_MAX_ROWS 1000
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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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PrettyBlockOutputStream(WriteBuffer & ostr_, size_t max_rows_ = PRETTY_FORMAT_DEFAULT_MAX_ROWS);
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void write(const Block & block);
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void writeSuffix();
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BlockOutputStreamPtr clone() { return new PrettyBlockOutputStream(ostr); }
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protected:
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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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};
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}
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