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103 lines
3.6 KiB
C++
103 lines
3.6 KiB
C++
#pragma once
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#include <ext/shared_ptr_helper.h>
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#include <Parsers/IAST_fwd.h>
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#include <Parsers/ASTSelectWithUnionQuery.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 ext::shared_ptr_helper<StorageMaterializedView>, public IStorage
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{
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friend struct ext::shared_ptr_helper<StorageMaterializedView>;
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public:
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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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ASTPtr getSelectQuery() const { return select->clone(); }
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ASTPtr getInnerQuery() const { return inner_query->clone(); }
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NameAndTypePair getColumn(const String & column_name) const override;
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bool hasColumn(const String & column_name) const override;
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StorageInMemoryMetadata getInMemoryMetadata() const override;
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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 mayBenefitFromIndexForIn(const ASTPtr & left_in_operand, const Context & query_context) const override
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{
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return getTargetTable()->mayBenefitFromIndexForIn(left_in_operand, query_context);
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}
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BlockOutputStreamPtr write(const ASTPtr & query, const Context & context) override;
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void drop(TableStructureWriteLockHolder &) override;
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void truncate(const ASTPtr &, const Context &, TableStructureWriteLockHolder &) override;
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bool optimize(const ASTPtr & query, const ASTPtr & partition, bool final, bool deduplicate, const Context & context) override;
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void alter(const AlterCommands & params, const Context & context, TableStructureWriteLockHolder & table_lock_holder) override;
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void checkAlterIsPossible(const AlterCommands & commands, const Settings & settings) override;
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void alterPartition(const ASTPtr & query, const PartitionCommands & commands, const Context & context) override;
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void mutate(const MutationCommands & commands, const Context & context) override;
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void rename(const String & new_path_to_db, const String & new_database_name, const String & new_table_name, TableStructureWriteLockHolder &) override;
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void shutdown() override;
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void checkTableCanBeDropped() const override;
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void checkPartitionCanBeDropped(const ASTPtr & partition) override;
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QueryProcessingStage::Enum getQueryProcessingStage(const Context & context, const ASTPtr &) const override;
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StoragePtr getTargetTable() const;
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StoragePtr tryGetTargetTable() const;
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ActionLock getActionLock(StorageActionBlockType type) override;
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Pipes read(
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const Names & column_names,
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const SelectQueryInfo & query_info,
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const Context & 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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Strings getDataPaths() const override;
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private:
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/// Can be empty if SELECT query doesn't contain table
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StorageID select_table_id = StorageID::createEmpty();
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/// Will be initialized in constructor
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StorageID target_table_id = StorageID::createEmpty();
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ASTPtr select;
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ASTPtr inner_query;
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Context & global_context;
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bool has_inner_table = false;
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void checkStatementCanBeForwarded() const;
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protected:
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StorageMaterializedView(
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const StorageID & table_id_,
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Context & 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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};
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}
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