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45 lines
1.1 KiB
C++
45 lines
1.1 KiB
C++
#pragma once
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#include <Storages/System/IStorageSystemOneBlock.h>
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namespace DB
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{
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/**
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* Usgae example. How to get mapping from local paths to remote paths:
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* SELECT
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* cache_path,
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* cache_hits,
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* remote_path,
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* local_path,
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* file_segment_range_begin,
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* file_segment_range_end,
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* size,
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* state
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* FROM
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* (
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* SELECT
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* arrayJoin(cache_paths) AS cache_path,
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* local_path,
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* remote_path
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* FROM system.remote_data_paths
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* ) AS data_paths
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* INNER JOIN system.filesystem_cache AS caches ON data_paths.cache_path = caches.cache_path
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* FORMAT Vertical
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*/
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class StorageSystemFilesystemCache final : public IStorageSystemOneBlock<StorageSystemFilesystemCache>
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{
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public:
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explicit StorageSystemFilesystemCache(const StorageID & table_id_);
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std::string getName() const override { return "SystemFilesystemCache"; }
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static NamesAndTypesList getNamesAndTypes();
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protected:
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void fillData(MutableColumns & res_columns, ContextPtr context, const SelectQueryInfo & query_info) const override;
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};
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}
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