Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/18700#discussion_r132961933
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/catalog/SessionCatalog.scala
---
@@ -1096,8 +1099,42 @@ class SessionCatalog(
* This performs reflection to decide what type of [[Expression]] to
return in the builder.
*/
protected def makeFunctionBuilder(name: String, functionClassName:
String): FunctionBuilder = {
--- End diff --
this will be overwritten by `HiveSessionCatalog`, does it mean we can not
register spark UDAF if hive support is enable?
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