ClickHouse/dbms/include/DB/Storages/System/StorageSystemMerges.h

38 lines
905 B
C++

#pragma once
#include <ext/shared_ptr_helper.hpp>
#include <DB/Storages/IStorage.h>
namespace DB
{
class StorageSystemMerges : private ext::shared_ptr_helper<StorageSystemMerges>, public IStorage
{
friend class ext::shared_ptr_helper<StorageSystemMerges>;
public:
static StoragePtr create(const std::string & name);
std::string getName() const override { return "SystemMerges"; }
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;
StorageSystemMerges(const std::string & name);
};
}