Trait datafusion::execution::FunctionRegistry
source · pub trait FunctionRegistry {
// Required methods
fn udfs(&self) -> HashSet<String, RandomState>;
fn udf(&self, name: &str) -> Result<Arc<ScalarUDF>, DataFusionError>;
fn udaf(&self, name: &str) -> Result<Arc<AggregateUDF>, DataFusionError>;
}Expand description
A registry knows how to build logical expressions out of user-defined function’ names
Required Methods§
sourcefn udfs(&self) -> HashSet<String, RandomState>
fn udfs(&self) -> HashSet<String, RandomState>
Set of all available udfs.
sourcefn udf(&self, name: &str) -> Result<Arc<ScalarUDF>, DataFusionError>
fn udf(&self, name: &str) -> Result<Arc<ScalarUDF>, DataFusionError>
Returns a reference to the udf named name.
sourcefn udaf(&self, name: &str) -> Result<Arc<AggregateUDF>, DataFusionError>
fn udaf(&self, name: &str) -> Result<Arc<AggregateUDF>, DataFusionError>
Returns a reference to the udaf named name.