ClickHouse/dbms/src/Storages/System/StorageSystemMutations.h

#pragma once

#include <ext/shared_ptr_helper.h>
#include <Storages/System/IStorageSystemOneBlock.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 IStorageSystemOneBlock<StorageSystemMutations>
{
    friend struct ext::shared_ptr_helper<StorageSystemMutations>;
public:
    String getName() const override { return "SystemMutations"; }

    static NamesAndTypesList getNamesAndTypes();

protected:
    using IStorageSystemOneBlock::IStorageSystemOneBlock;

    void fillData(MutableColumns & res_columns, const Context & context, const SelectQueryInfo & query_info) const override;
};

}