gatorsmile commented on a change in pull request #25754: [SPARK-29048] Improve
performance on Column.isInCollection() with a large size collection
URL: https://github.com/apache/spark/pull/25754#discussion_r323333775
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File path: sql/core/src/main/scala/org/apache/spark/sql/Column.scala
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@@ -808,7 +809,14 @@ class Column(val expr: Expression) extends Logging {
* @group expr_ops
* @since 2.4.0
*/
- def isInCollection(values: scala.collection.Iterable[_]): Column =
isin(values.toSeq: _*)
+ def isInCollection(values: scala.collection.Iterable[_]): Column = withExpr {
+ val hSet = values.toSet[Any]
Review comment:
We can move it to the if condition.
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