ClickHouse/dbms/src/Storages/System/StorageSystemMutations.h
2018-06-13 17:15:36 +03:00

37 lines
850 B
C++

#pragma once
#include <ext/shared_ptr_helper.h>
#include <Storages/IStorage.h>
namespace DB
{
class Context;
/// Implements the `mutations` system table, which provides information about the status of mutations
/// in the MergeTree tables.
class StorageSystemMutations : public ext::shared_ptr_helper<StorageSystemMutations>, public IStorage
{
public:
String getName() const override { return "SystemMutations"; }
String getTableName() const override { return name; }
BlockInputStreams read(
const Names & column_names,
const SelectQueryInfo & query_info,
const Context & context,
QueryProcessingStage::Enum & processed_stage,
size_t max_block_size,
unsigned num_streams) override;
private:
const String name;
protected:
StorageSystemMutations(const String & name_);
};
}