mikhailnik-db commented on code in PR #48748:
URL: https://github.com/apache/spark/pull/48748#discussion_r1829706671
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/collect.scala:
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@@ -265,3 +271,239 @@ private[aggregate] object CollectTopK {
case _ => throw QueryCompilationErrors.invalidNumParameter(e)
}
}
+
+@ExpressionDescription(
+ usage = "_FUNC_(expr) - Returns the concatenation of non-null input values,"
+
Review Comment:
added `arguments` + some minor improvements
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