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56 lines
1.5 KiB
C++
56 lines
1.5 KiB
C++
#pragma once
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#include <Common/Exception.h>
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#include <common/types.h>
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#include <IO/WriteHelpers.h>
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#include <Storages/MutationCommands.h>
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#include <map>
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namespace DB
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{
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class ReadBuffer;
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class WriteBuffer;
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/// Mutation entry in /mutations path in zookeeper. This record contains information about blocks
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/// in patitions. We will mutatate all parts with left number less than this numbers.
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///
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/// These entries processed separately from main replication /log, and produce other entries
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/// -- MUTATE_PART in main replication log.
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struct ReplicatedMergeTreeMutationEntry
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{
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void writeText(WriteBuffer & out) const;
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void readText(ReadBuffer & in);
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String toString() const;
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static ReplicatedMergeTreeMutationEntry parse(const String & str, String znode_name);
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/// Name of znode (mutation-xxxxxxx)
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String znode_name;
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/// Create time of znode
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time_t create_time = 0;
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/// Replica which initiated mutation
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String source_replica;
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/// Acquired block numbers
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/// partition_id -> block_number
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using BlockNumbersType = std::map<String, Int64>;
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BlockNumbersType block_numbers;
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/// Mutation commands which will give to MUTATE_PART entries
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MutationCommands commands;
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/// Version of metadata. Not equal to -1 only if this mutation
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/// was created by ALTER MODIFY/DROP queries.
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int alter_version = -1;
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bool isAlterMutation() const { return alter_version != -1; }
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};
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using ReplicatedMergeTreeMutationEntryPtr = std::shared_ptr<const ReplicatedMergeTreeMutationEntry>;
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}
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