cloud-fan commented on a change in pull request #34303:
URL: https://github.com/apache/spark/pull/34303#discussion_r730718372
##########
File path:
sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveSessionCatalog.scala
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@@ -119,10 +124,58 @@ private[sql] class HiveSessionCatalog(
try {
super.makeFunctionExpression(name, clazz, input)
} catch {
- // If `super.makeFunctionExpression` throw `InvalidUDFClassException`,
we construct
- // Hive UDF/UDAF/UDTF with function definition. Otherwise, we just
throw it earlier.
+ // If `super.makeFunctionExpression` throw `InvalidUDFClassException`,
we try to construct
+ // ScalaAggregator or Hive UDF/UDAF/UDTF with function definition.
Otherwise,
+ // we just throw it earlier.
+ // Unfortunately we need to use reflection here because Aggregator
+ // and ScalaAggregator are defined in sql/core module.
Review comment:
classes in sql/core are available in sql/hive. What's the problem you
hit?
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