mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-30 03:22:14 +00:00
34 lines
643 B
C++
34 lines
643 B
C++
#pragma once
|
|
|
|
#include <DB/Parsers/ASTUseQuery.h>
|
|
#include <DB/Interpreters/Context.h>
|
|
#include <DB/Interpreters/IInterpreter.h>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
|
|
/** Выбрать БД по-умолчанию для сессии.
|
|
*/
|
|
class InterpreterUseQuery : public IInterpreter
|
|
{
|
|
public:
|
|
InterpreterUseQuery(ASTPtr query_ptr_, Context & context_)
|
|
: query_ptr(query_ptr_), context(context_) {}
|
|
|
|
BlockIO execute() override
|
|
{
|
|
const String & new_database = typeid_cast<const ASTUseQuery &>(*query_ptr).database;
|
|
context.getSessionContext().setCurrentDatabase(new_database);
|
|
return {};
|
|
}
|
|
|
|
private:
|
|
ASTPtr query_ptr;
|
|
Context & context;
|
|
};
|
|
|
|
|
|
}
|