#pragma once

#include <Storages/System/IStorageSystemOneBlock.h>

namespace DB
{

class AsynchronousMetrics;
class Context;


/** Implements system table asynchronous_metrics, which allows to get values of periodically (asynchronously) updated metrics.
  */
class StorageSystemAsynchronousMetrics final : public IStorageSystemOneBlock
{
public:
    StorageSystemAsynchronousMetrics(const StorageID & table_id_, const AsynchronousMetrics & async_metrics_);

    std::string getName() const override { return "SystemAsynchronousMetrics"; }

    static ColumnsDescription getColumnsDescription();

private:
    const AsynchronousMetrics & async_metrics;

protected:
    void fillData(MutableColumns & res_columns, ContextPtr, const ActionsDAG::Node *, std::vector<UInt8>) const override;
};

}