1 | #pragma once |
---|---|
2 | |
3 | #include <DataTypes/DataTypeString.h> |
4 | #include <DataTypes/DataTypesNumber.h> |
5 | #include <ext/shared_ptr_helper.h> |
6 | #include <Storages/System/IStorageSystemOneBlock.h> |
7 | |
8 | |
9 | namespace DB |
10 | { |
11 | |
12 | class Context; |
13 | |
14 | /** Implements system table 'clusters' |
15 | * that allows to obtain information about available clusters |
16 | * (which may be specified in Distributed tables). |
17 | */ |
18 | class StorageSystemClusters : public ext::shared_ptr_helper<StorageSystemClusters>, public IStorageSystemOneBlock<StorageSystemClusters> |
19 | { |
20 | friend struct ext::shared_ptr_helper<StorageSystemClusters>; |
21 | public: |
22 | std::string getName() const override { return "SystemClusters"; } |
23 | |
24 | static NamesAndTypesList getNamesAndTypes(); |
25 | |
26 | protected: |
27 | using IStorageSystemOneBlock::IStorageSystemOneBlock; |
28 | |
29 | void fillData(MutableColumns & res_columns, const Context & context, const SelectQueryInfo & query_info) const override; |
30 | }; |
31 | |
32 | } |
33 |