Trait datafusion::logical_plan::FunctionRegistry

pub trait FunctionRegistry {
    fn udfs(&self) -> HashSet<String>;
    fn udf(&self, name: &str) -> Result<Arc<ScalarUDF>>;
    fn udaf(&self, name: &str) -> Result<Arc<AggregateUDF>>;
}

A registry knows how to build logical expressions out of user-defined function' names

Required methods

fn udfs(&self) -> HashSet<String>

Set of all available udfs.

fn udf(&self, name: &str) -> Result<Arc<ScalarUDF>>

Returns a reference to the udf named name.

fn udaf(&self, name: &str) -> Result<Arc<AggregateUDF>>

Returns a reference to the udaf named name.

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Implementors

impl FunctionRegistry for ExecutionContext

fn udfs(&self) -> HashSet<String>

fn udf(&self, name: &str) -> Result<Arc<ScalarUDF>>

fn udaf(&self, name: &str) -> Result<Arc<AggregateUDF>>

impl FunctionRegistry for ExecutionContextState

fn udfs(&self) -> HashSet<String>

fn udf(&self, name: &str) -> Result<Arc<ScalarUDF>>

fn udaf(&self, name: &str) -> Result<Arc<AggregateUDF>>

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