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39 lines
1.0 KiB
C++
39 lines
1.0 KiB
C++
#pragma once
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#include <TableFunctions/ITableFunction.h>
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#include <Parsers/ASTCreateQuery.h>
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#include <base/types.h>
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namespace DB
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{
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/* view(query)
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* Turning subquery into a table.
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* Useful for passing subquery around.
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*/
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class TableFunctionView : public ITableFunction
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{
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public:
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static constexpr auto name = "view";
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std::string getName() const override { return name; }
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const ASTSelectWithUnionQuery & getSelectQuery() const;
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private:
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StoragePtr executeImpl(const ASTPtr & ast_function, ContextPtr context, const String & table_name, ColumnsDescription cached_columns, bool is_insert_query) const override;
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const char * getStorageTypeName() const override { return "View"; }
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std::vector<size_t> skipAnalysisForArguments(const QueryTreeNodePtr & query_node_table_function, ContextPtr context) const override;
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void parseArguments(const ASTPtr & ast_function, ContextPtr context) override;
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ColumnsDescription getActualTableStructure(ContextPtr context, bool is_insert_query) const override;
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ASTCreateQuery create;
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};
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}
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