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40 lines
822 B
C++
40 lines
822 B
C++
#pragma once
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#include <thread>
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#include <Core/BackgroundSchedulePool.h>
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#include <Common/ZooKeeper/Types.h>
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#include <Core/Types.h>
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#include <common/logger_useful.h>
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namespace DB
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{
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class StorageReplicatedMergeTree;
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/** Keeps track of changing the table structure in ZooKeeper and performs the necessary conversions.
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*
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* NOTE This has nothing to do with manipulating partitions,
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* which are processed through the replication queue.
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*/
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class ReplicatedMergeTreeAlterThread
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{
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public:
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ReplicatedMergeTreeAlterThread(StorageReplicatedMergeTree & storage_);
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void start() { task->activateAndSchedule(); }
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void stop() { task->deactivate(); }
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private:
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void run();
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StorageReplicatedMergeTree & storage;
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String log_name;
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Logger * log;
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BackgroundSchedulePool::TaskHolder task;
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};
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}
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