kotlin-spark-api_3.3.2_2.13/org.jetbrains.kotlinx.spark.api/NamedUserDefinedFunction4

NamedUserDefinedFunction4

class NamedUserDefinedFunction4<T1, T2, T3, T4, R>(    val name: String,     udf: UserDefinedFunction,     encoder: Encoder<R>) : UserDefinedFunction4<T1, T2, T3, T4, R> , NamedUserDefinedFunction<R, NamedUserDefinedFunction4<T1, T2, T3, T4, R>>

Instance of a UDF with 4 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.

See also

UserDefinedFunction

Constructors

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constructor(name: String, 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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abstract val encoder: Encoder<R>
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open override val name: String
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open val nullable: Boolean

Returns true when the UDF can return a nullable value.

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abstract val udf: UserDefinedFunction

Functions

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abstract operator fun getValue(thisRef: Any?, property: KProperty<*>): NamedUserDefinedFunction4<T1, T2, T3, T4, R>

Converts this UserDefinedFunction to a NamedUserDefinedFunction.

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operator fun invoke(param0: Column, param1: Column, param2: Column, param3: Column): Column

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

operator fun <DsType> invoke(    param0: TypedColumn<DsType, T1>,     param1: TypedColumn<DsType, T2>,     param2: TypedColumn<DsType, T3>,     param3: TypedColumn<DsType, T4>): 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(param0: Column, param1: Column, param2: Column, param3: Column): Column

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

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