All Superinterfaces:
Serializable

@Stable public interface UDF21<T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,T14,T15,T16,T17,T18,T19,T20,T21,R> extends Serializable

A Spark SQL UDF that has 21 arguments.