ClickHouse/dbms/include/DB/Storages/System/StorageSystemEvents.h
2015-09-24 06:50:09 +03:00

43 lines
986 B
C++

#pragma once
#include <Poco/SharedPtr.h>
#include <DB/Storages/IStorage.h>
namespace DB
{
using Poco::SharedPtr;
/** Реализует системную таблицу events, которая позволяет получить информацию для профайлинга.
*/
class StorageSystemEvents : public IStorage
{
public:
static StoragePtr create(const std::string & name_);
std::string getName() const override { return "SystemEvents"; }
std::string getTableName() const override { return name; }
const NamesAndTypesList & getColumnsListImpl() const override { return columns; }
BlockInputStreams read(
const Names & column_names,
ASTPtr query,
const Context & context,
const Settings & settings,
QueryProcessingStage::Enum & processed_stage,
size_t max_block_size = DEFAULT_BLOCK_SIZE,
unsigned threads = 1) override;
private:
const std::string name;
NamesAndTypesList columns;
StorageSystemEvents(const std::string & name_);
};
}