Struct MemoryFunctionRegistry 

pub struct MemoryFunctionRegistry { /* private fields */ }

A FunctionRegistry that uses in memory HashMaps

Implementations

impl MemoryFunctionRegistry

pub fn new() -> MemoryFunctionRegistry

Trait Implementations

impl Debug for MemoryFunctionRegistry

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for MemoryFunctionRegistry

fn default() -> MemoryFunctionRegistry

Returns the “default value” for a type.

impl FunctionRegistry for MemoryFunctionRegistry

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

Returns names of all available scalar user defined functions.

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

Returns a reference to the user defined scalar function (udf) named name.

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

Returns a reference to the user defined aggregate function (udaf) named name.

fn udwf(&self, name: &str) -> Result<Arc<WindowUDF>, DataFusionError>

Returns a reference to the user defined window function (udwf) named name.

fn register_udf( &mut self, udf: Arc<ScalarUDF>, ) -> Result<Option<Arc<ScalarUDF>>, DataFusionError>

Registers a new ScalarUDF, returning any previously registered implementation.

fn register_udaf( &mut self, udaf: Arc<AggregateUDF>, ) -> Result<Option<Arc<AggregateUDF>>, DataFusionError>

Registers a new AggregateUDF, returning any previously registered implementation.

fn register_udwf( &mut self, udaf: Arc<WindowUDF>, ) -> Result<Option<Arc<WindowUDF>>, DataFusionError>

Registers a new WindowUDF, returning any previously registered implementation.

fn expr_planners(&self) -> Vec<Arc<dyn ExprPlanner>>

Set of all registered ExprPlanners

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

Returns names of all available aggregate user defined functions.

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

Returns names of all available window user defined functions.

fn deregister_udf( &mut self, _name: &str, ) -> Result<Option<Arc<ScalarUDF>>, DataFusionError>

Deregisters a ScalarUDF, returning the implementation that was deregistered.

fn deregister_udaf( &mut self, _name: &str, ) -> Result<Option<Arc<AggregateUDF>>, DataFusionError>

Deregisters a AggregateUDF, returning the implementation that was deregistered.

fn deregister_udwf( &mut self, _name: &str, ) -> Result<Option<Arc<WindowUDF>>, DataFusionError>

Deregisters a WindowUDF, returning the implementation that was deregistered.

fn register_function_rewrite( &mut self, _rewrite: Arc<dyn FunctionRewrite + Sync + Send>, ) -> Result<(), DataFusionError>

Registers a new FunctionRewrite with the registry.

fn register_expr_planner( &mut self, _expr_planner: Arc<dyn ExprPlanner>, ) -> Result<(), DataFusionError>

Registers a new ExprPlanner with the registry.