ClickHouse/src/Storages/System/StorageSystemDDLWorkerQueue.h

#pragma once

#include <Interpreters/DDLWorker.h>
#include <Storages/System/IStorageSystemOneBlock.h>
#include <future>

namespace DB
{
class Context;


/** System table "distributed_ddl_queue" with list of queries that are currently in the DDL worker queue.
  */
class StorageSystemDDLWorkerQueue final : public IStorageSystemOneBlock<StorageSystemDDLWorkerQueue>
{
protected:
    void fillData(MutableColumns & res_columns, ContextPtr context, const SelectQueryInfo &) const override;

    using IStorageSystemOneBlock::IStorageSystemOneBlock;

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

    static NamesAndTypesList getNamesAndTypes();
};
}