cloud-fan commented on code in PR #42740:
URL: https://github.com/apache/spark/pull/42740#discussion_r1311670227
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sql/core/src/main/scala/org/apache/spark/sql/functions.scala:
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@@ -241,29 +249,35 @@ object functions {
* @since 1.3.0
*/
@deprecated("Use approx_count_distinct", "2.1.0")
- def approxCountDistinct(e: Column): Column = approx_count_distinct(e)
+ def approxCountDistinct(e: Column): Column = withAggregateFunction {
Review Comment:
since we need to touch a lot of functions anyway, here is a long-standing
cleanup work that is not finished: most of the functions can be implemented by
creating `UnresolvedFunction`. We don't need to create the function expression
directly.
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