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117 lines
4.7 KiB
C++
117 lines
4.7 KiB
C++
#pragma once
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#include <Parsers/IAST_fwd.h>
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#include <Storages/IStorage.h>
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#include <Storages/StorageInMemoryMetadata.h>
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namespace DB
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{
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class StorageMaterializedView final : public IStorage, WithMutableContext
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{
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public:
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StorageMaterializedView(
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const StorageID & table_id_,
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ContextPtr local_context,
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const ASTCreateQuery & query,
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const ColumnsDescription & columns_,
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bool attach_,
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const String & comment);
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std::string getName() const override { return "MaterializedView"; }
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bool isView() const override { return true; }
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bool isRemote() const override;
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bool hasInnerTable() const { return has_inner_table; }
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bool supportsSampling() const override { return getTargetTable()->supportsSampling(); }
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bool supportsPrewhere() const override { return getTargetTable()->supportsPrewhere(); }
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bool supportsFinal() const override { return getTargetTable()->supportsFinal(); }
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bool supportsIndexForIn() const override { return getTargetTable()->supportsIndexForIn(); }
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bool supportsParallelInsert() const override { return getTargetTable()->supportsParallelInsert(); }
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bool supportsSubcolumns() const override { return getTargetTable()->supportsSubcolumns(); }
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bool supportsTransactions() const override { return getTargetTable()->supportsTransactions(); }
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bool mayBenefitFromIndexForIn(const ASTPtr & left_in_operand, ContextPtr query_context, const StorageMetadataPtr & /* metadata_snapshot */) const override
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{
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auto target_table = getTargetTable();
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auto metadata_snapshot = target_table->getInMemoryMetadataPtr();
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return target_table->mayBenefitFromIndexForIn(left_in_operand, query_context, metadata_snapshot);
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}
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SinkToStoragePtr write(const ASTPtr & query, const StorageMetadataPtr & /*metadata_snapshot*/, ContextPtr context, bool async_insert) override;
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void drop() override;
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void dropInnerTableIfAny(bool sync, ContextPtr local_context) override;
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void truncate(const ASTPtr &, const StorageMetadataPtr &, ContextPtr, TableExclusiveLockHolder &) override;
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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 alter(const AlterCommands & params, ContextPtr context, AlterLockHolder & table_lock_holder) override;
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void checkMutationIsPossible(const MutationCommands & commands, const Settings & settings) const override;
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void checkAlterIsPossible(const AlterCommands & commands, ContextPtr context) const override;
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Pipe alterPartition(const StorageMetadataPtr & metadata_snapshot, const PartitionCommands & commands, ContextPtr context) override;
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void checkAlterPartitionIsPossible(const PartitionCommands & commands, const StorageMetadataPtr & metadata_snapshot, const Settings & settings, ContextPtr local_context) const override;
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void mutate(const MutationCommands & commands, ContextPtr context) override;
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void renameInMemory(const StorageID & new_table_id) override;
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void startup() override;
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void shutdown(bool is_drop) override;
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QueryProcessingStage::Enum
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getQueryProcessingStage(ContextPtr, QueryProcessingStage::Enum, const StorageSnapshotPtr &, SelectQueryInfo &) const override;
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StoragePtr getTargetTable() const;
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StoragePtr tryGetTargetTable() const;
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/// Get the virtual column of the target table;
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NamesAndTypesList getVirtuals() const override;
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ActionLock getActionLock(StorageActionBlockType type) 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 StorageSnapshotPtr & storage_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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size_t num_streams) override;
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Strings getDataPaths() const override;
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void backupData(BackupEntriesCollector & backup_entries_collector, const String & data_path_in_backup, const std::optional<ASTs> & partitions) override;
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void restoreDataFromBackup(RestorerFromBackup & restorer, const String & data_path_in_backup, const std::optional<ASTs> & partitions) override;
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bool supportsBackupPartition() const override;
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std::optional<UInt64> totalRows(const Settings & settings) const override;
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std::optional<UInt64> totalBytes(const Settings & settings) const override;
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std::optional<UInt64> totalBytesUncompressed(const Settings & settings) const override;
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private:
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/// Will be initialized in constructor
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StorageID target_table_id = StorageID::createEmpty();
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bool has_inner_table = false;
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void checkStatementCanBeForwarded() const;
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};
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}
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