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65 lines
1.9 KiB
C++
65 lines
1.9 KiB
C++
#pragma once
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#include <base/types.h>
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#include <Disks/IDisk.h>
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#include <Storages/MergeTree/MergeTreePartInfo.h>
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#include <Storages/MutationCommands.h>
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#include <Common/TransactionID.h>
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namespace DB
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{
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class IBackupEntry;
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/// A mutation entry for non-replicated MergeTree storage engines.
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/// Stores information about mutation in file mutation_*.txt.
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struct MergeTreeMutationEntry
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{
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time_t create_time = 0;
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MutationCommands commands;
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DiskPtr disk;
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String path_prefix;
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String file_name;
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bool is_temp = false;
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UInt64 block_number = 0;
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String latest_failed_part;
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MergeTreePartInfo latest_failed_part_info;
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time_t latest_fail_time = 0;
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String latest_fail_reason;
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/// ID of transaction which has created mutation.
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TransactionID tid = Tx::PrehistoricTID;
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/// CSN of transaction which has created mutation
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/// or UnknownCSN if it's not committed (yet) or RolledBackCSN if it's rolled back or PrehistoricCSN if there is no transaction.
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CSN csn = Tx::UnknownCSN;
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/// Create a new entry and write it to a temporary file.
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MergeTreeMutationEntry(MutationCommands commands_, DiskPtr disk, const String & path_prefix_, UInt64 tmp_number,
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const TransactionID & tid_, const WriteSettings & settings);
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MergeTreeMutationEntry(const MergeTreeMutationEntry &) = delete;
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MergeTreeMutationEntry(MergeTreeMutationEntry &&) = default;
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/// Commit entry and rename it to a permanent file.
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void commit(UInt64 block_number_);
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void removeFile();
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void writeCSN(CSN csn_);
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std::shared_ptr<const IBackupEntry> backup() const;
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static String versionToFileName(UInt64 block_number_);
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static UInt64 tryParseFileName(const String & file_name_);
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static UInt64 parseFileName(const String & file_name_);
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/// Load an existing entry.
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MergeTreeMutationEntry(DiskPtr disk_, const String & path_prefix_, const String & file_name_);
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~MergeTreeMutationEntry();
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};
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}
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