Github user KurtYoung commented on a diff in the pull request:
https://github.com/apache/flink/pull/3520#discussion_r106324868
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/sources/TableSource.scala
---
@@ -39,4 +39,6 @@ trait TableSource[T] {
/** Returns the [[TypeInformation]] for the return type of the
[[TableSource]]. */
def getReturnType: TypeInformation[T]
+ /** Describes the table source */
+ def explainTerms(pw: RelWriter): RelWriter = pw
--- End diff --
Make sense to me, will change this.
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