Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/7148#discussion_r33652131
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/functions.scala ---
@@ -1829,7 +1829,15 @@ object functions {
*/
@deprecated("Use callUDF", "1.5.0")
def callUdf(udfName: String, cols: Column*): Column = {
- UnresolvedFunction(udfName, cols.map(_.expr))
+ // Note: we avoid using closures here because on file systems that are
case-insensitive, the
+ // compiled class file for the closure here will conflict with the one
in callUDF (upper case).
+ val exprs = new
scala.collection.mutable.ArrayBuffer[Expression](cols.size)
--- End diff --
we can just use Array here, as we have known the size ahead of time.
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