kotlin-spark-api_3.3.2_2.13/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.

See also

UserDefinedFunction

Inheritors

Constructors

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constructor(udf: UserDefinedFunction, encoder: Encoder<R>)

Properties

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open val deterministic: Boolean

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

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open override val encoder: Encoder<R>
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open val nullable: Boolean

Returns true when the UDF can return a nullable value.

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open override val udf: UserDefinedFunction

Functions

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

Returns named variant of this UDF.

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

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

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fun invokeUntyped(): Column

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

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

Returns named variant of this UDF.