mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-09-30 21:50:49 +00:00
33 lines
814 B
C++
33 lines
814 B
C++
#pragma once
|
|
|
|
#include <DB/Parsers/IAST.h>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
/** Element of expression with ASC or DESC,
|
|
* and possibly with COLLATE.
|
|
*/
|
|
class ASTOrderByElement : public IAST
|
|
{
|
|
public:
|
|
int direction; /// 1 for ASC, -1 for DESC
|
|
|
|
/** Collation for locale-specific string comparison. If empty, then sorting done by bytes. */
|
|
ASTPtr collation;
|
|
|
|
ASTOrderByElement() = default;
|
|
ASTOrderByElement(const StringRange range_, const int direction_, ASTPtr & collation_)
|
|
: IAST(range_), direction(direction_), collation(collation_) {}
|
|
|
|
String getID() const override { return "OrderByElement"; }
|
|
|
|
ASTPtr clone() const override { return std::make_shared<ASTOrderByElement>(*this); }
|
|
|
|
protected:
|
|
void formatImpl(const FormatSettings & settings, FormatState & state, FormatStateStacked frame) const override;
|
|
};
|
|
|
|
}
|