Class

org.apache.spark.sql.expressions

UserDefinedFunction

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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. Note that 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. 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
@Experimental()
Source
UserDefinedFunction.scala
Since

1.3.0

Linear Supertypes
Serializable, Serializable, Product, Equals, AnyRef, Any
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Inherited
  1. UserDefinedFunction
  2. Serializable
  3. Serializable
  4. Product
  5. Equals
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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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    AnyRef → Any

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

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    AnyRef → Any

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

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  5. final def asInstanceOf[T0]: T0

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    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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    AnyRef

  15. final def notify(): Unit

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    AnyRef

  16. final def notifyAll(): Unit

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    AnyRef

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

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  18. final def wait(): Unit

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    @throws( ... )

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

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    @throws( ... )

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

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Inherited from Serializable

Inherited from Serializable

Inherited from Product

Inherited from Equals

Inherited from AnyRef

Inherited from Any

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