ClickHouse/dbms/include/DB/Parsers/ASTQueryWithOutput.h
Alexey Milovidov 310ed66b00 Revert "dbms: improvement (incomplete) [#METR-16164]."
This reverts commit 6f4f44ce7980cace32edd0913b8d1d53cd51682b.
2015-05-03 12:13:08 +03:00

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#pragma once
#include <DB/Parsers/IAST.h>
namespace DB
{
/** Запрос с секцией FORMAT.
*/
class ASTQueryWithOutput : public IAST
{
public:
ASTPtr format;
ASTQueryWithOutput() = default;
ASTQueryWithOutput(const StringRange range_) : IAST(range_) {}
};
/// Объявляет класс-наследник ASTQueryWithOutput с реализованными методами getID и clone.
#define DEFINE_AST_QUERY_WITH_OUTPUT(Name, ID) \
class Name : public ASTQueryWithOutput \
{ \
public: \
Name() {} \
Name(StringRange range_) : ASTQueryWithOutput(range_) {} \
String getID() const override { return ID; }; \
\
ASTPtr clone() const override \
{ \
Name * res = new Name(*this); \
ASTPtr ptr{res}; \
res->children.clear(); \
if (format) \
{ \
res->format = format->clone(); \
res->children.push_back(res->format); \
} \
return ptr; \
} \
};
}