Method registry

datafusion/core/src/dataframe/mod.rs:1812–1814

Return a `FunctionRegistry` used to plan udf's calls # Example ``` # use datafusion::prelude::*; # use datafusion::error::Result; # #[tokio::main] # async fn main() -> Result<()> { let ctx = SessionContext::new(); let df = ctx .read_csv("tests/data/example.csv", CsvReadOptions::new()) .await?; let f = df.registry(); // use f.udf("name", vec![...]) to use the udf # Ok(()) # } ```

(&self)

    /// # }
    /// ```
    pub fn registry(&self) -> &dyn FunctionRegistry {
        self.session_state.as_ref()
    }

    /// Calculate the intersection of two [`DataFrame`]s.  The two [`DataFrame`]s must have exactly the same schema
    ///