#pragma once #include namespace DB { class ColumnsDescription; class Context; /* * function(source, format, structure[, compression_method]) - creates a temporary storage from formatted source */ class ITableFunctionFileLike : public ITableFunction { public: bool needStructureHint() const override { return structure == "auto"; } void setStructureHint(const ColumnsDescription & structure_hint_) override { structure_hint = structure_hint_; } protected: void parseArguments(const ASTPtr & ast_function, ContextPtr context) override; String filename; String format = "auto"; String structure = "auto"; String compression_method = "auto"; ColumnsDescription structure_hint; private: StoragePtr executeImpl(const ASTPtr & ast_function, ContextPtr context, const std::string & table_name, ColumnsDescription cached_columns) const override; virtual StoragePtr getStorage( const String & source, const String & format, const ColumnsDescription & columns, ContextPtr global_context, const std::string & table_name, const String & compression_method) const = 0; bool hasStaticStructure() const override { return structure != "auto"; } }; }