kotlin-spark-api_3.0.2_2.12/org.jetbrains.kotlinx.spark.api/NamedUserDefinedFunction0

NamedUserDefinedFunction0

class NamedUserDefinedFunction0<R>( val name: String, udf: <Error class: unknown class>, encoder: <Error class: unknown class><R>) : UserDefinedFunction0<R> , NamedUserDefinedFunction<R, NamedUserDefinedFunction0<R>>

Instance of a UDF with 0 arguments with name. This UDF can be invoked with (typed) columns in a Dataset.select or selectTyped call. Alternatively it can be registered for SQL calls using register.

Constructors

fun <R> NamedUserDefinedFunction0( name: String, udf: <Error class: unknown class>, encoder: <Error class: unknown class><R>)

Functions

getValue

abstract operator fun getValue(thisRef: Any?, property: KProperty<*>): NamedUserDefinedFunction0<R>

Converts this UserDefinedFunction to a NamedUserDefinedFunction.

invoke

operator fun <DsType> invoke(): <Error class: unknown class><DsType, R>

Allows this UDF to be called in typed manner using columns in a Dataset.selectTyped call.

invokeUntyped

fun invokeUntyped(): <Error class: unknown class>

Returns an expression that invokes the UDF in untyped manner, using the given arguments.

withName

abstract fun withName(name: String): NamedUserDefinedFunction0<R>

Converts this UserDefinedFunction to a NamedUserDefinedFunction.

Properties

deterministic

open val deterministic: Boolean

Returns true iff the UDF is deterministic, i.e. the UDF produces the same output given the same input.

encoder

abstract val encoder: <Error class: unknown class><Return>

name

open override val name: String

nullable

open val nullable: Boolean

Returns true when the UDF can return a nullable value.

udf

abstract val udf: <Error class: unknown class>

NamedUserDefinedFunction0

See also

Constructors

Functions

Properties