ClickHouse/dbms/include/DB/Parsers/ASTRenameQuery.h

56 lines
1.4 KiB
C++

#pragma once
#include <DB/Parsers/IAST.h>
namespace DB
{
/** RENAME запрос
*/
class ASTRenameQuery : public IAST
{
public:
struct Table
{
String database;
String table;
};
struct Element
{
Table from;
Table to;
};
using Elements = std::vector<Element>;
Elements elements;
ASTRenameQuery() = default;
ASTRenameQuery(const StringRange range_) : IAST(range_) {}
/** Получить текст, который идентифицирует этот элемент. */
String getID() const override { return "Rename"; };
ASTPtr clone() const override { return std::make_shared<ASTRenameQuery>(*this); }
protected:
void formatImpl(const FormatSettings & settings, FormatState & state, FormatStateStacked frame) const override
{
settings.ostr << (settings.hilite ? hilite_keyword : "") << "RENAME TABLE " << (settings.hilite ? hilite_none : "");
for (ASTRenameQuery::Elements::const_iterator it = elements.begin(); it != elements.end(); ++it)
{
if (it != elements.begin())
settings.ostr << ", ";
settings.ostr << (!it->from.database.empty() ? backQuoteIfNeed(it->from.database) + "." : "") << backQuoteIfNeed(it->from.table)
<< (settings.hilite ? hilite_keyword : "") << " TO " << (settings.hilite ? hilite_none : "")
<< (!it->to.database.empty() ? backQuoteIfNeed(it->to.database) + "." : "") << backQuoteIfNeed(it->to.table);
}
}
};
}