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

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#pragma once
#include <DB/Parsers/ASTExpressionList.h>
#include <DB/Parsers/ASTFunction.h>
namespace DB
{
/** CREATE TABLE или ATTACH TABLE запрос
*/
class ASTCreateQuery : public IAST
{
public:
bool attach; /// Запрос ATTACH TABLE, а не CREATE TABLE.
bool if_not_exists;
String database;
String table;
ASTPtr columns;
ASTPtr storage;
ASTPtr inner_storage; /// Внутренний engine для запроса CREATE MATERIALIZED VIEW
String as_database;
String as_table;
ASTPtr select;
ASTCreateQuery() {}
ASTCreateQuery(StringRange range_) : IAST(range_), attach(false), if_not_exists(false) {}
/** Получить текст, который идентифицирует этот элемент. */
String getID() const { return (attach ? "AttachQuery_" : "CreateQuery_") + database + "_" + table; };
ASTPtr clone() const
{
ASTCreateQuery * res = new ASTCreateQuery(*this);
res->children.clear();
if (columns) { res->columns = columns->clone(); res->children.push_back(res->columns); }
if (storage) { res->storage = storage->clone(); res->children.push_back(res->storage); }
if (select) { res->select = select->clone(); res->children.push_back(res->select); }
return res;
}
};
}