Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/12975#discussion_r62451961
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/command/functions.scala
---
@@ -157,6 +157,9 @@ case class DropFunction(
throw new AnalysisException(s"Specifying a database in DROP
TEMPORARY FUNCTION " +
s"is not allowed: '${databaseName.get}'")
}
+ if (FunctionRegistry.builtin.functionExists(functionName)) {
--- End diff --
Overwriting a built-in function is missing in the current implementation of
the current `FunctionRegistry`. Should we support it in this release?
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