twalthr 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_r319480986
##########
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:
We should also mention that users cannot use any arbitrary tables for
temporal join but need to use a table backed by a `LookupableTableSource`. Can
people also perform other operations on top of this table before like
projection? I guess no, right?
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