kotlin-spark-api_3.0.1_2.12/org.jetbrains.kotlinx.spark.api/UserDefinedFunction0

UserDefinedFunction0

open class UserDefinedFunction0<R>(val udf: UserDefinedFunction, val encoder: Encoder<R>) : UserDefinedFunction<R, NamedUserDefinedFunction0<R>>

Instance of a UDF with 0 arguments. 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> UserDefinedFunction0(udf: UserDefinedFunction, encoder: Encoder<R>)

Functions

getValue

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

Returns named variant of this UDF.

invoke

operator fun <DsType> invoke(): TypedColumn<DsType, R>

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

invokeUntyped

fun invokeUntyped(): Column

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

withName

open override fun withName(name: String): NamedUserDefinedFunction0<R>

Returns named variant of this UDF.

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

open override val encoder: Encoder<R>

nullable

open val nullable: Boolean

Returns true when the UDF can return a nullable value.

udf

open override val udf: UserDefinedFunction

Inheritors

NamedUserDefinedFunction0

UserDefinedFunction0

See also

Constructors

Functions

Properties

Inheritors