zhengruifeng commented on code in PR #47464:
URL: https://github.com/apache/spark/pull/47464#discussion_r1690669385
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala:
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@@ -767,6 +771,7 @@ object FunctionRegistry {
expression[EqualNull]("equal_null"),
expression[HllSketchEstimate]("hll_sketch_estimate"),
expression[HllUnion]("hll_union"),
+ expression[UnwrapUDT]("unwrap_udt"),
Review Comment:
I see, but `UnwrapUDT` was introduced for [3rd ML library
xgboost](https://github.com/apache/spark/pull/36408#issue-1220627011)
I am not sure whether it is suitable to be exposed in SQL. also cc
@WeichenXu123
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