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_r319477378
##########
File path: docs/dev/table/streaming/joins.md
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@@ -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.
+
+A join with a temporal table joins an append/upsert/retract stream (left
input/probe side) with a temporal table (right input/build side),
Review comment:
we should not use the term `stream` here because we are in the table world
now. So:
`A join with a temporal table joins an arbitrary table (left input/probe
side) with a temporal table (right input/build side), i.e.,`
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