Method with_default_features

datafusion/core/src/execution/session_state.rs:1165–1208

Adds defaults for table_factories, file formats, expr_planners and builtin scalar, aggregate and windows functions. Note overwrites any previously registered items with the same name.

(mut self)

    ///
    /// Note overwrites any previously registered items with the same name.
    pub fn with_default_features(mut self) -> Self {
        self.table_factories
            .get_or_insert_with(HashMap::new)
            .extend(SessionStateDefaults::default_table_factories());

        self.file_formats
            .get_or_insert_with(Vec::new)
            .extend(SessionStateDefaults::default_file_formats());

        self.expr_planners
            .get_or_insert_with(Vec::new)
            .extend(SessionStateDefaults::default_expr_planners());

        self.scalar_functions
            .get_or_insert_with(Vec::new)
            .extend(SessionStateDefaults::default_scalar_functions());

        self.higher_order_functions
            .get_or_insert_with(Vec::new)
            .extend(SessionStateDefaults::default_higher_order_functions());

        self.aggregate_functions
            .get_or_insert_with(Vec::new)
            .extend(SessionStateDefaults::default_aggregate_functions());

        self.window_functions
            .get_or_insert_with(Vec::new)
            .extend(SessionStateDefaults::default_window_functions());

        self.extension_types
            .get_or_insert_with(|| Arc::new(MemoryExtensionTypeRegistry::new_empty()))
            .extend(&SessionStateDefaults::default_extension_types())
            .expect("MemoryExtensionTypeRegistry is not read-only.");

        self.table_functions
            .get_or_insert_with(HashMap::new)
            .extend(
                SessionStateDefaults::default_table_functions()
                    .into_iter()
                    .map(|f| (f.name().to_string(), f)),
            );

        self
    }

    /// Returns a new [`SessionStateBuilder`] with default features.
    ///