srowen commented on a change in pull request #23275: [SPARK-26323][SQL] Scala
UDF should still check input types even if some inputs are of type Any
URL: https://github.com/apache/spark/pull/23275#discussion_r240275041
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/expressions/UserDefinedFunction.scala
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@@ -88,68 +88,49 @@ sealed trait UserDefinedFunction {
private[sql] case class SparkUserDefinedFunction(
f: AnyRef,
dataType: DataType,
- inputTypes: Option[Seq[DataType]],
- nullableTypes: Option[Seq[Boolean]],
+ inputSchemas: Seq[Option[ScalaReflection.Schema]],
name: Option[String] = None,
nullable: Boolean = true,
deterministic: Boolean = true) extends UserDefinedFunction {
@scala.annotation.varargs
- override def apply(exprs: Column*): Column = {
- // TODO: make sure this class is only instantiated through
`SparkUserDefinedFunction.create()`
- // and `nullableTypes` is always set.
- if (inputTypes.isDefined) {
- assert(inputTypes.get.length == nullableTypes.get.length)
- }
-
- val inputsNullSafe = nullableTypes.getOrElse {
- ScalaReflection.getParameterTypeNullability(f)
- }
+ override def apply(cols: Column*): Column = {
+ Column(createScalaUDF(cols.map(_.expr)))
+ }
- Column(ScalaUDF(
+ private[sql] def createScalaUDF(exprs: Seq[Expression]): ScalaUDF = {
+ // It's possible that some of the inputs don't have a specific type(e.g.
`Any`), skip type
+ // check and null check for them.
+ val inputTypes = inputSchemas.map(_.map(_.dataType).getOrElse(AnyDataType))
+ val inputsNullSafe = inputSchemas.map(_.map(_.nullable).getOrElse(true))
Review comment:
I'm missing it, how could you write this more simply with `forall` to get
from `Option[Schema]` to `Boolean`?
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