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33 lines
950 B
C++
33 lines
950 B
C++
#pragma once
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#include <DB/Parsers/IAST.h>
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namespace DB
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{
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/** Элемент выражения, после которого стоит ASC или DESC
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*/
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class ASTOrderByElement : public IAST
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{
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public:
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int direction; /// 1, если ASC, -1, если DESC
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/** Collation for locale-specific string comparison. If empty, then sorting done by bytes. */
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ASTPtr collation;
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ASTOrderByElement() = default;
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ASTOrderByElement(const StringRange range_, const int direction_, ASTPtr & collation_)
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: IAST(range_), direction(direction_), collation(collation_) {}
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/** Получить текст, который идентифицирует этот элемент. */
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String getID() const override { return "OrderByElement"; }
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ASTPtr clone() const override { return std::make_shared<ASTOrderByElement>(*this); }
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protected:
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void formatImpl(const FormatSettings & settings, FormatState & state, FormatStateStacked frame) const override;
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};
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}
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