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71 lines
2.3 KiB
C++
71 lines
2.3 KiB
C++
#pragma once
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#include <ext/shared_ptr_helper.h>
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#include <Storages/IStorage.h>
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namespace DB
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{
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class IAST;
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using ASTPtr = std::shared_ptr<IAST>;
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class StorageMaterializedView : public ext::shared_ptr_helper<StorageMaterializedView>, public IStorage
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{
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public:
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std::string getName() const override { return "MaterializedView"; }
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std::string getTableName() const override { return table_name; }
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const NamesAndTypes & getColumnsListImpl() const override { return columns; }
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ASTPtr getInnerQuery() const { return inner_query->clone(); };
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StoragePtr getTargetTable() const;
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NameAndType getColumn(const String & column_name) const override;
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bool hasColumn(const String & column_name) 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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BlockOutputStreamPtr write(const ASTPtr & query, const Settings & settings) override;
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void drop() 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 shutdown() override;
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BlockInputStreams 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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private:
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String select_database_name;
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String select_table_name;
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String target_database_name;
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String target_table_name;
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String table_name;
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String database_name;
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ASTPtr inner_query;
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Context & global_context;
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NamesAndTypes columns;
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bool has_inner_table = false;
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protected:
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StorageMaterializedView(
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const String & table_name_,
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const String & database_name_,
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Context & local_context,
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const ASTCreateQuery & query,
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const NamesAndTypes & columns_,
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const NamesAndTypes & materialized_columns_,
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const NamesAndTypes & alias_columns_,
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const ColumnDefaults & column_defaults_,
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bool attach_);
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};
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}
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