Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/4161#discussion_r123776397
--- Diff: docs/dev/table/tableApi.md ---
@@ -1338,7 +1338,10 @@ The `OverWindow` defines a range of rows over which
aggregates are computed. `Ov
<p>At the moment, over windows with rows following the current row
are not supported. All over windows must stop at the current row and only two
values are supported for <code>following</code>, <code>CURRENT_RANGE</code> for
a time interval and <code>CURRENT_ROW</code> for a row-count interval.</p>
- <p>If the `following` clause is omitted, the window will end at
the current row.</p>
+ <p><code>CURRENT_ROW</code> means the window will end at the
current row.</p>
+ <p><code>CURRENT_RANGE</code> means the window will end at the
current rowâs last peer in the ORDER BY ordering.</p>
--- End diff --
`CURRENT_ROW` sets the upper bound of the window to the current row.
`CURRENT_RANGE` sets the upper bound of the window to sort key of the the
current row, i.e., all rows with the same sort key as the current row are
included in the window.
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