davidradl commented on code in PR #27929:
URL: https://github.com/apache/flink/pull/27929#discussion_r3094003300
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docs/content/docs/dev/table/functions/ptfs.md:
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@@ -1015,6 +1030,149 @@ not needed anymore via `Context#clearAllTimers()` or
`TimeContext#clearTimer(Str
{{< top >}}
+Ordering
+--------
+
+A PTF that takes a table with set semantics can optionally specify an ORDER BY
clause in the
+function call to define the order in which rows are processed within each
partition. The ORDER BY
+clause guarantees that rows are delivered to the eval() method in the
specified order.
Review Comment:
is this true if there are nulls in the first column and no secondary column
to sort on, I would assume the nulls would mean that the order is not specified
for those columns.
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