Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/17379#discussion_r108576926
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/internal/sessionStateBuilders.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 udf: UDFRegistration = new
UDFRegistration(functionRegistry)
--- End diff --
This file only contains effectively one builder. So it should be named
after the class.
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