Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/20402#discussion_r164336721
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/QueryExecution.scala ---
@@ -23,7 +23,7 @@ import java.sql.{Date, Timestamp}
import org.apache.spark.rdd.RDD
import org.apache.spark.sql.{AnalysisException, Row, SparkSession}
import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.analysis.UnsupportedOperationChecker
+import org.apache.spark.sql.catalyst.analysis.{EliminateBarriers,
UnsupportedOperationChecker}
--- End diff --
`EliminateBarriers` is not used now.
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