1 | #pragma once |
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2 | |
3 | #include <ext/shared_ptr_helper.h> |
4 | #include <Storages/IStorage.h> |
5 | |
6 | |
7 | namespace DB |
8 | { |
9 | /* One block storage used for values table function |
10 | * It's structure is similar to IStorageSystemOneBlock |
11 | */ |
12 | class StorageValues : public ext::shared_ptr_helper<StorageValues>, public IStorage |
13 | { |
14 | friend struct ext::shared_ptr_helper<StorageValues>; |
15 | public: |
16 | std::string getName() const override { return "Values"; } |
17 | std::string getTableName() const override { return table_name; } |
18 | std::string getDatabaseName() const override { return database_name; } |
19 | |
20 | BlockInputStreams read( |
21 | const Names & column_names, |
22 | const SelectQueryInfo & query_info, |
23 | const Context & context, |
24 | QueryProcessingStage::Enum processed_stage, |
25 | size_t max_block_size, |
26 | unsigned num_streams) override; |
27 | |
28 | private: |
29 | std::string database_name; |
30 | std::string table_name; |
31 | Block res_block; |
32 | |
33 | protected: |
34 | StorageValues(const std::string & database_name_, const std::string & table_name_, const ColumnsDescription & columns_, const Block & res_block_); |
35 | }; |
36 | |
37 | } |
38 |