Github user kiszk commented on a diff in the pull request:
https://github.com/apache/spark/pull/18533#discussion_r125578949
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/StarSchemaDetection.scala
---
@@ -28,7 +28,9 @@ import org.apache.spark.sql.internal.SQLConf
/**
* Encapsulates star-schema detection logic.
*/
-case class StarSchemaDetection(conf: SQLConf) extends PredicateHelper {
+object StarSchemaDetection extends PredicateHelper {
+
+ private def conf = SQLConf.get
--- End diff --
Can we remove `import org.apache.spark.sql.internal.SQLConf`?
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