Class

org.apache.spark.sql.expressions

UserDefinedFunction

Related Doc: package expressions

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case class UserDefinedFunction(f: AnyRef, dataType: DataType, inputTypes: Option[Seq[DataType]]) extends Product with Serializable

A user-defined function. To create one, use the udf functions in functions.

As an example:

// Defined a UDF that returns true or false based on some numeric score.
val predict = udf((score: Double) => if (score > 0.5) true else false)

// Projects a column that adds a prediction column based on the score column.
df.select( predict(df("score")) )
Annotations
@Stable()
Source
UserDefinedFunction.scala
Since

1.3.0

Note

The user-defined functions must be deterministic. Due to optimization, duplicate invocations may be eliminated or the function may even be invoked more times than it is present in the query.

Linear Supertypes
Serializable, Serializable, Product, Equals, AnyRef, Any
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Inherited
  1. UserDefinedFunction
  2. Serializable
  3. Serializable
  4. Product
  5. Equals
  6. AnyRef
  7. Any
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Visibility
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Instance Constructors

  1. new UserDefinedFunction(f: AnyRef, dataType: DataType, inputTypes: Option[Seq[DataType]])

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    Attributes
    protected[org.apache.spark.sql]

Value Members

  1. final def !=(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  2. final def ##(): Int

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    Definition Classes
    AnyRef → Any

  3. final def ==(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  4. def apply(exprs: Column*): Column

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

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

    Since

    1.3.0

  5. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any

  6. def clone(): AnyRef

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  7. val dataType: DataType

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  8. final def eq(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef

  9. val f: AnyRef

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  10. def finalize(): Unit

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )

  11. final def getClass(): Class[_]

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    Definition Classes
    AnyRef → Any

  12. val inputTypes: Option[Seq[DataType]]

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  13. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any

  14. final def ne(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef

  15. final def notify(): Unit

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    Definition Classes
    AnyRef

  16. final def notifyAll(): Unit

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    Definition Classes
    AnyRef

  17. final def synchronized[T0](arg0: ⇒ T0): T0

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    Definition Classes
    AnyRef

  18. final def wait(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  19. final def wait(arg0: Long, arg1: Int): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  20. final def wait(arg0: Long): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Inherited from Serializable

Inherited from Serializable

Inherited from Product

Inherited from Equals

Inherited from AnyRef

Inherited from Any

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