ClickHouse/src/Storages/System/StorageSystemDatabases.h
Ivan 495c6e03aa
Replace all Context references with std::weak_ptr (#22297)
* Replace all Context references with std::weak_ptr

* Fix shared context captured by value

* Fix build

* Fix Context with named sessions

* Fix copy context

* Fix gcc build

* Merge with master and fix build

* Fix gcc-9 build
2021-04-11 02:33:54 +03:00

33 lines
784 B
C++

#pragma once
#include <ext/shared_ptr_helper.h>
#include <Storages/System/IStorageSystemOneBlock.h>
namespace DB
{
class Context;
/** Implements `databases` system table, which allows you to get information about all databases.
*/
class StorageSystemDatabases final : public ext::shared_ptr_helper<StorageSystemDatabases>, public IStorageSystemOneBlock<StorageSystemDatabases>
{
friend struct ext::shared_ptr_helper<StorageSystemDatabases>;
public:
std::string getName() const override
{
return "SystemDatabases";
}
static NamesAndTypesList getNamesAndTypes();
protected:
using IStorageSystemOneBlock::IStorageSystemOneBlock;
void fillData(MutableColumns & res_columns, ContextPtr context, const SelectQueryInfo &) const override;
};
}