Github user twalthr commented on a diff in the pull request:
https://github.com/apache/flink/pull/4471#discussion_r152817078
--- Diff:
flink-libraries/flink-table/src/test/scala/org/apache/flink/table/runtime/stream/sql/JoinITCase.scala
---
@@ -30,6 +30,8 @@ import org.apache.flink.table.api.{TableEnvironment,
Types}
import org.apache.flink.table.expressions.Null
import org.apache.flink.table.runtime.utils.{StreamITCase,
StreamingWithStateTestBase}
import org.apache.flink.types.Row
+import org.hamcrest.CoreMatchers
--- End diff --
Remove unused import.
---
