Trait RdfFusionFunctionRegistry 

pub trait RdfFusionFunctionRegistry:
    Debug
    + Send
    + Sync {
    // Required methods
    fn udf_supported_encodings(
        &self,
        function_name: &FunctionName,
    ) -> DFResult<Vec<EncodingName>>;
    fn udf(&self, function_name: &FunctionName) -> DFResult<Arc<ScalarUDF>>;
    fn udaf(&self, function_name: &FunctionName) -> DFResult<Arc<AggregateUDF>>;
    fn register_udf(&self, udf: ScalarUDF);
    fn register_udaf(&self, udaf: AggregateUDF);
}

A registry for SPARQL functions that can create DataFusion UDFs and UDAFs.

This trait defines the interface for creating DataFusion user-defined functions (UDFs) and user-defined aggregate functions (UDAFs) that implement SPARQL function semantics.

Additional Resources

• SPARQL 1.1 Query Language - Functions

Required Methods

fn udf_supported_encodings( &self, function_name: &FunctionName, ) -> DFResult<Vec<EncodingName>>

Returns the encodings supported by function_name.

fn udf(&self, function_name: &FunctionName) -> DFResult<Arc<ScalarUDF>>

Creates a ScalarUDF.

fn udaf(&self, function_name: &FunctionName) -> DFResult<Arc<AggregateUDF>>

Creates a AggregateUDF.

fn register_udf(&self, udf: ScalarUDF)

Register a ScalarUDF.

fn register_udaf(&self, udaf: AggregateUDF)

Register a AggregateUDF.

Implementors