cloud-fan commented on code in PR #37494:
URL: https://github.com/apache/spark/pull/37494#discussion_r946291319
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sql/catalyst/src/main/scala/org/apache/spark/sql/connector/expressions/expressions.scala:
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@@ -389,3 +390,8 @@ private[sql] object SortValue {
None
}
}
+
+private[sql] abstract class AbstractExpression extends Expression with
Serializable {
Review Comment:
I mean java package private... basically just define the class without
`public`. We can simply put this class in `Expression.java`
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