[GitHub] [flink] wuchong commented on a change in pull request #9545: [FLINK-13355][docs] Add documentation for Temporal Table Join in blink planner

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wuchong commented on a change in pull request #9545: [FLINK-13355][docs] Add documentation for Temporal Table Join in blink planner
URL: https://github.com/apache/flink/pull/9545#discussion_r319898381
 
 

 ##########
 File path: docs/dev/table/streaming/joins.md
 ##########
 @@ -222,4 +222,131 @@ By definition of event time, [watermarks]({{ site.baseurl }}/dev/event_time.html
 forward in time and discard versions of the build table that are no longer necessary because no incoming row with
 lower or equal timestamp is expected.
 
+Join with a Temporal Table
+--------------------------
+
+**Notes:** This is only supported in blink planner.
 
 Review comment:
   You are right. We can't perform other operations on a `LookupableTableSource`. But if the table source also implements `StreamTableSource`, it can support other operations. 
   
   I will add this notes. 

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