Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/20000#discussion_r157430602
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/StreamingJoinHelper.scala
---
@@ -20,7 +20,10 @@ package org.apache.spark.sql.catalyst.analysis
import scala.util.control.NonFatal
import org.apache.spark.internal.Logging
-import org.apache.spark.sql.catalyst.expressions.{Add, AttributeReference,
AttributeSet, Cast, CheckOverflow, Expression, ExpressionSet, GreaterThan,
GreaterThanOrEqual, LessThan, LessThanOrEqual, Literal, Multiply,
PreciseTimestampConversion, PredicateHelper, Subtract, TimeAdd, TimeSub,
UnaryMinus}
+import org.apache.spark.sql.catalyst.expressions.{Add, AttributeReference,
AttributeSet, Cast, CheckOverflow, Expression}
+import org.apache.spark.sql.catalyst.expressions.{ExpressionSet,
GreaterThan, GreaterThanOrEqual, LessThan, LessThanOrEqual}
--- End diff --
maybe just import org.apache.spark.sql.catalyst.expressions._ ?
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