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https://github.com/ClickHouse/ClickHouse.git
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495c6e03aa
* Replace all Context references with std::weak_ptr * Fix shared context captured by value * Fix build * Fix Context with named sessions * Fix copy context * Fix gcc build * Merge with master and fix build * Fix gcc-9 build
262 lines
11 KiB
C++
262 lines
11 KiB
C++
#pragma once
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#include <ext/shared_ptr_helper.h>
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#include <Core/Names.h>
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#include <Storages/AlterCommands.h>
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#include <Storages/IStorage.h>
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#include <Storages/MergeTree/MergeTreeData.h>
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#include <Storages/MergeTree/MergeTreeDataSelectExecutor.h>
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#include <Storages/MergeTree/MergeTreeDataWriter.h>
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#include <Storages/MergeTree/MergeTreeDataMergerMutator.h>
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#include <Storages/MergeTree/MergeTreePartsMover.h>
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#include <Storages/MergeTree/MergeTreeMutationEntry.h>
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#include <Storages/MergeTree/MergeTreeMutationStatus.h>
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#include <Storages/MergeTree/MergeTreeDeduplicationLog.h>
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#include <Disks/StoragePolicy.h>
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#include <Common/SimpleIncrement.h>
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#include <Storages/MergeTree/BackgroundJobsExecutor.h>
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namespace DB
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{
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/** See the description of the data structure in MergeTreeData.
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*/
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class StorageMergeTree final : public ext::shared_ptr_helper<StorageMergeTree>, public MergeTreeData
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{
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friend struct ext::shared_ptr_helper<StorageMergeTree>;
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public:
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void startup() override;
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void shutdown() override;
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~StorageMergeTree() override;
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std::string getName() const override { return merging_params.getModeName() + "MergeTree"; }
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bool supportsParallelInsert() const override { return true; }
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bool supportsIndexForIn() const override { return true; }
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Pipe read(
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const Names & column_names,
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const StorageMetadataPtr & /*metadata_snapshot*/,
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SelectQueryInfo & query_info,
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ContextPtr context,
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QueryProcessingStage::Enum processed_stage,
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size_t max_block_size,
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unsigned num_streams) override;
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void read(
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QueryPlan & query_plan,
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const Names & column_names,
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const StorageMetadataPtr & /*metadata_snapshot*/,
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SelectQueryInfo & query_info,
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ContextPtr context,
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QueryProcessingStage::Enum processed_stage,
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size_t max_block_size,
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unsigned num_streams) override;
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std::optional<UInt64> totalRows(const Settings &) const override;
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std::optional<UInt64> totalRowsByPartitionPredicate(const SelectQueryInfo &, ContextPtr) const override;
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std::optional<UInt64> totalBytes(const Settings &) const override;
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BlockOutputStreamPtr write(const ASTPtr & query, const StorageMetadataPtr & /*metadata_snapshot*/, ContextPtr context) override;
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/** Perform the next step in combining the parts.
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*/
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bool optimize(
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const ASTPtr & query,
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const StorageMetadataPtr & /*metadata_snapshot*/,
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const ASTPtr & partition,
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bool final,
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bool deduplicate,
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const Names & deduplicate_by_columns,
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ContextPtr context) override;
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void mutate(const MutationCommands & commands, ContextPtr context) override;
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/// Return introspection information about currently processing or recently processed mutations.
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std::vector<MergeTreeMutationStatus> getMutationsStatus() const override;
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CancellationCode killMutation(const String & mutation_id) override;
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void drop() override;
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void truncate(const ASTPtr &, const StorageMetadataPtr &, ContextPtr, TableExclusiveLockHolder &) override;
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void alter(const AlterCommands & commands, ContextPtr context, TableLockHolder & table_lock_holder) override;
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void checkTableCanBeDropped() const override;
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ActionLock getActionLock(StorageActionBlockType action_type) override;
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void onActionLockRemove(StorageActionBlockType action_type) override;
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CheckResults checkData(const ASTPtr & query, ContextPtr context) override;
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std::optional<JobAndPool> getDataProcessingJob() override;
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MergeTreeDeduplicationLog * getDeduplicationLog() { return deduplication_log.get(); }
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private:
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/// Mutex and condvar for synchronous mutations wait
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std::mutex mutation_wait_mutex;
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std::condition_variable mutation_wait_event;
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MergeTreeDataSelectExecutor reader;
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MergeTreeDataWriter writer;
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MergeTreeDataMergerMutator merger_mutator;
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BackgroundJobsExecutor background_executor;
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BackgroundMovesExecutor background_moves_executor;
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std::unique_ptr<MergeTreeDeduplicationLog> deduplication_log;
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/// For block numbers.
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SimpleIncrement increment;
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/// For clearOldParts, clearOldTemporaryDirectories.
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AtomicStopwatch time_after_previous_cleanup;
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/// Mutex for parts currently processing in background
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/// merging (also with TTL), mutating or moving.
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mutable std::mutex currently_processing_in_background_mutex;
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mutable std::condition_variable currently_processing_in_background_condition;
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/// Parts that currently participate in merge or mutation.
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/// This set have to be used with `currently_processing_in_background_mutex`.
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DataParts currently_merging_mutating_parts;
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std::map<String, MergeTreeMutationEntry> current_mutations_by_id;
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std::multimap<Int64, MergeTreeMutationEntry &> current_mutations_by_version;
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std::atomic<bool> shutdown_called {false};
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void loadMutations();
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/// Load and initialize deduplication logs. Even if deduplication setting
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/// equals zero creates object with deduplication window equals zero.
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void loadDeduplicationLog();
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/** Determines what parts should be merged and merges it.
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* If aggressive - when selects parts don't takes into account their ratio size and novelty (used for OPTIMIZE query).
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* Returns true if merge is finished successfully.
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*/
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bool merge(bool aggressive, const String & partition_id, bool final, bool deduplicate, const Names & deduplicate_by_columns, String * out_disable_reason = nullptr, bool optimize_skip_merged_partitions = false);
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/// Make part state outdated and queue it to remove without timeout
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/// If force, then stop merges and block them until part state became outdated. Throw exception if part doesn't exists
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/// If not force, then take merges selector and check that part is not participating in background operations.
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MergeTreeDataPartPtr outdatePart(const String & part_name, bool force);
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ActionLock stopMergesAndWait();
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/// Allocate block number for new mutation, write mutation to disk
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/// and into in-memory structures. Wake up merge-mutation task.
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Int64 startMutation(const MutationCommands & commands, String & mutation_file_name);
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/// Wait until mutation with version will finish mutation for all parts
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void waitForMutation(Int64 version, const String & file_name);
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struct CurrentlyMergingPartsTagger
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{
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FutureMergedMutatedPart future_part;
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ReservationPtr reserved_space;
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StorageMergeTree & storage;
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// Optional tagger to maintain volatile parts for the JBOD balancer
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std::optional<CurrentlySubmergingEmergingTagger> tagger;
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CurrentlyMergingPartsTagger(
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FutureMergedMutatedPart & future_part_,
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size_t total_size,
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StorageMergeTree & storage_,
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const StorageMetadataPtr & metadata_snapshot,
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bool is_mutation);
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~CurrentlyMergingPartsTagger();
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};
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using CurrentlyMergingPartsTaggerPtr = std::unique_ptr<CurrentlyMergingPartsTagger>;
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friend struct CurrentlyMergingPartsTagger;
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struct MergeMutateSelectedEntry
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{
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FutureMergedMutatedPart future_part;
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CurrentlyMergingPartsTaggerPtr tagger;
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MutationCommands commands;
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MergeMutateSelectedEntry(const FutureMergedMutatedPart & future_part_, CurrentlyMergingPartsTaggerPtr && tagger_, const MutationCommands & commands_)
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: future_part(future_part_)
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, tagger(std::move(tagger_))
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, commands(commands_)
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{}
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};
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std::shared_ptr<MergeMutateSelectedEntry> selectPartsToMerge(
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const StorageMetadataPtr & metadata_snapshot,
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bool aggressive,
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const String & partition_id,
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bool final,
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String * disable_reason,
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TableLockHolder & table_lock_holder,
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bool optimize_skip_merged_partitions = false,
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SelectPartsDecision * select_decision_out = nullptr);
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bool mergeSelectedParts(const StorageMetadataPtr & metadata_snapshot, bool deduplicate, const Names & deduplicate_by_columns, MergeMutateSelectedEntry & entry, TableLockHolder & table_lock_holder);
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std::shared_ptr<MergeMutateSelectedEntry> selectPartsToMutate(const StorageMetadataPtr & metadata_snapshot, String * disable_reason, TableLockHolder & table_lock_holder);
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bool mutateSelectedPart(const StorageMetadataPtr & metadata_snapshot, MergeMutateSelectedEntry & entry, TableLockHolder & table_lock_holder);
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Int64 getCurrentMutationVersion(
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const DataPartPtr & part,
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std::unique_lock<std::mutex> & /* currently_processing_in_background_mutex_lock */) const;
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void clearOldMutations(bool truncate = false);
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// Partition helpers
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void dropPartition(const ASTPtr & partition, bool detach, bool drop_part, ContextPtr context, bool throw_if_noop) override;
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PartitionCommandsResultInfo attachPartition(const ASTPtr & partition, const StorageMetadataPtr & metadata_snapshot, bool part, ContextPtr context) override;
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void replacePartitionFrom(const StoragePtr & source_table, const ASTPtr & partition, bool replace, ContextPtr context) override;
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void movePartitionToTable(const StoragePtr & dest_table, const ASTPtr & partition, ContextPtr context) override;
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bool partIsAssignedToBackgroundOperation(const DataPartPtr & part) const override;
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/// Update mutation entries after part mutation execution. May reset old
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/// errors if mutation was successful. Otherwise update last_failed* fields
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/// in mutation entries.
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void updateMutationEntriesErrors(FutureMergedMutatedPart result_part, bool is_successful, const String & exception_message);
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/// Return empty optional if mutation was killed. Otherwise return partially
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/// filled mutation status with information about error (latest_fail*) and
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/// is_done. mutation_ids filled with mutations with the same errors,
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/// because we can execute several mutations at once. Order is important for
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/// better readability of exception message. If mutation was killed doesn't
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/// return any ids.
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std::optional<MergeTreeMutationStatus> getIncompleteMutationsStatus(Int64 mutation_version, std::set<String> * mutation_ids = nullptr) const;
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void startBackgroundMovesIfNeeded() override;
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friend class MergeTreeBlockOutputStream;
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friend class MergeTreeData;
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protected:
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/** Attach the table with the appropriate name, along the appropriate path (with / at the end),
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* (correctness of names and paths are not checked)
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* consisting of the specified columns.
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*
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* See MergeTreeData constructor for comments on parameters.
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*/
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StorageMergeTree(
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const StorageID & table_id_,
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const String & relative_data_path_,
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const StorageInMemoryMetadata & metadata,
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bool attach,
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ContextPtr context_,
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const String & date_column_name,
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const MergingParams & merging_params_,
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std::unique_ptr<MergeTreeSettings> settings_,
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bool has_force_restore_data_flag);
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MutationCommands getFirstAlterMutationCommandsForPart(const DataPartPtr & part) const override;
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};
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}
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