Module traits

Module containing traits to be implemented by a user

A basic UDF just needs to implement BasicUdf. An aggregate UDF needs to implement both BasicUdf and AggregateUdf.

Structs

Init

Typestate marker for the initialization phase

Process

Typestate marker for the processing phase

Traits

AggregateUdf

This trait must be implemented if this function performs aggregation.

BasicUdf

This trait specifies the functions needed for a standard (non-aggregate) UDF

UdfState

A state of the UDF, representing either Init or Process