sealed abstract class UserDefinedFunction extends AnyRef
A user-defined function. To create one, use the udf functions in functions.
As an example:
// Define a UDF that returns true or false based on some numeric score. val predict = udf((score: Double) => score > 0.5) // Projects a column that adds a prediction column based on the score column. df.select( predict(df("score")) )
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- @Stable()
- Source
- UserDefinedFunction.scala
- Since
1.3.0
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- abstract def apply(exprs: Column*): Column
Returns an expression that invokes the UDF, using the given arguments.
Returns an expression that invokes the UDF, using the given arguments.
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- @varargs()
- Since
1.3.0
- abstract def asNonNullable(): UserDefinedFunction
Updates UserDefinedFunction to non-nullable.
Updates UserDefinedFunction to non-nullable.
- Since
2.3.0
- abstract def asNondeterministic(): UserDefinedFunction
Updates UserDefinedFunction to nondeterministic.
Updates UserDefinedFunction to nondeterministic.
- Since
2.3.0
- abstract def deterministic: Boolean
Returns true iff the UDF is deterministic, i.e.
Returns true iff the UDF is deterministic, i.e. the UDF produces the same output given the same input.
- Since
2.3.0
- abstract def nullable: Boolean
Returns true when the UDF can return a nullable value.
Returns true when the UDF can return a nullable value.
- Since
2.3.0
- abstract def withName(name: String): UserDefinedFunction
Updates UserDefinedFunction with a given name.
Updates UserDefinedFunction with a given name.
- Since
2.3.0
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- @throws(classOf[java.lang.Throwable]) @Deprecated
- Deprecated
(Since version 9)