Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/3715#discussion_r125465060
--- Diff:
flink-libraries/flink-table/src/test/scala/org/apache/flink/table/api/scala/stream/sql/JoinTest.scala
---
@@ -101,22 +120,22 @@ class JoinTest extends TableTestBase {
verifyTimeBoundary(
--- End diff --
I'd add another case where both bounds are negative.
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