Github user hvanhovell commented on a diff in the pull request:
https://github.com/apache/spark/pull/17379#discussion_r108662296
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/internal/BaseSessionStateBuilder.scala
---
@@ -134,6 +135,14 @@ abstract class BaseSessionStateBuilder(
}
/**
+ * Interface exposed to the user for registering user-defined functions.
+ *
+ * Note 1: The user-defined functions must be deterministic.
+ * Note 2: This depends on the `functionRegistry` field.
+ */
+ protected def udfRegistration: UDFRegistration = new
UDFRegistration(functionRegistry)
--- End diff --
Minor: I was wondering why you moved this into the builder?
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