@@ -1439,7 +1439,7 @@ Group windows are defined in the `GROUP BY` clause of a SQL query. Just like que
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<td><code>TUMBLE(time_attr, interval)</code></td>
<td>Defines are tumbling time window. A tumbling time window assigns rows to non-overlapping, continuous windows with a fixed duration (<code>interval</code>). For example, a tumbling window of 5 minutes groups rows in 5 minutes intervals. Tumbling windows can be defined on event-time (stream + batch) or processing-time (stream).</td>
<td>Defines a tumbling time window. A tumbling time window assigns rows to non-overlapping, continuous windows with a fixed duration (<code>interval</code>). For example, a tumbling window of 5 minutes groups rows in 5 minutes intervals. Tumbling windows can be defined on event-time (stream + batch) or processing-time (stream).</td>
@@ -1454,6 +1454,40 @@ Group windows are defined in the `GROUP BY` clause of a SQL query. Just like que
For SQL queries on streaming tables, the `time_attr` argument of the group window function must be one of the `rowtime()` or `proctime()` time-indicators, which distinguish between event or processing time, respectively. For SQL on batch tables, the `time_attr` argument of the group window function must be an attribute of type `TIMESTAMP`.
#### Selecting Group Window Start and End Timestamps
The start and end timestamps of group windows can be selected with the following auxiliary functions: