ClickHouse/dbms/include/DB/Interpreters/InterpreterUseQuery.h

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#pragma once
#include <DB/Parsers/ASTUseQuery.h>
#include <DB/Interpreters/Context.h>
namespace DB
{
/** Выбрать БД по-умолчанию для сессии.
*/
class InterpreterUseQuery
{
public:
InterpreterUseQuery(ASTPtr query_ptr_, Context & context_)
: query_ptr(query_ptr_), context(context_) {}
void execute()
{
const String & new_database = dynamic_cast<const ASTUseQuery &>(*query_ptr).database;
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context.getSessionContext().setCurrentDatabase(new_database);
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}
private:
ASTPtr query_ptr;
Context & context;
};
}