[SPARK-25044][SQL][FOLLOWUP] add back UserDefinedFunction.inputTypes

## What changes were proposed in this pull request? This is a followup of #22259 . Scala case class has a wide surface: apply, unapply, accessors, copy, etc. In #22259 , we change the type of `UserDefinedFunction.inputTypes` from `Option[Seq[DataType]]` to `Option[Seq[Schema]]`. This breaks backward compatibility. This PR changes the type back, and use a `var` to keep the new nullable info. ## How was this patch tested? N/A Closes #22319 from cloud-fan/revert. Authored-by: Wenchen Fan <[email protected]> Signed-off-by: Wenchen Fan <[email protected]>
apache · Sep 5, 2018 · 341b55a · 341b55a
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diff --git a/project/MimaExcludes.scala b/project/MimaExcludes.scala
@@ -47,11 +47,6 @@ object MimaExcludes {
     ProblemFilters.exclude[DirectMissingMethodProblem]("org.apache.spark.ml.fpm.FPGrowthModel.this"),
     ProblemFilters.exclude[DirectMissingMethodProblem]("org.apache.spark.mllib.fpm.AssociationRules#Rule.this"),
 
-    // [SPARK-25044] Address translation of LMF closure primitive args to Object in Scala 2.12
-    ProblemFilters.exclude[MissingTypesProblem]("org.apache.spark.sql.expressions.UserDefinedFunction$"),
-    ProblemFilters.exclude[DirectMissingMethodProblem]("org.apache.spark.sql.expressions.UserDefinedFunction.apply"),
-    ProblemFilters.exclude[DirectMissingMethodProblem]("org.apache.spark.sql.expressions.UserDefinedFunction.copy"),
-
     // [SPARK-24296][CORE] Replicate large blocks as a stream.
     ProblemFilters.exclude[DirectMissingMethodProblem]("org.apache.spark.network.netty.NettyBlockRpcServer.this"),
     // [SPARK-23528] Add numIter to ClusteringSummary