RdfFusionFunctionRegistry

rdf_fusion::api::functions

Trait RdfFusionFunctionRegistry 

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

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

Required Methods§

Source

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

Returns the encodings supported by function_name.

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

Creates a ScalarUDF.

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

Creates a AggregateUDF.

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fn register_udf(&self, udf: ScalarUDF)

Register a ScalarUDF.

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fn register_udaf(&self, udaf: AggregateUDF)

Register a AggregateUDF.

Implementors§