Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/4135#discussion_r122469825
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/plan/schema/StreamTableSourceTable.scala
---
@@ -39,6 +39,8 @@ class StreamTableSourceTable[T](
val fieldCnt = fieldNames.length
val rowtime = tableSource match {
+ case emptyStringTimeSource : DefinedRowtimeAttribute if
emptyStringTimeSource.getRowtimeAttribute.trim.equals("") =>
--- End diff --
We should move the check `getRowtimeAttribute == null` (currently `case _
=> None`) to the top to avoid an NPE if the attribute is null.
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