dianfu commented on a change in pull request #7209: [FLINK-10977][table] Add
UnBounded FlatAggregate operator to streaming Table API
URL: https://github.com/apache/flink/pull/7209#discussion_r241279604
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File path: docs/dev/table/tableApi.md
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@@ -550,6 +550,82 @@ val result = orders.distinct()
{% top %}
+### TableAggregations
+
+<div class="codetabs" markdown="1">
+<div data-lang="java" markdown="1">
+
+<table class="table table-bordered">
+ <thead>
+ <tr>
+ <th class="text-left" style="width: 20%">Operators</th>
+ <th class="text-center">Description</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td>
+ <strong>GroupBy TableAggregation</strong><br>
+ <span class="label label-primary">Streaming</span><br>
+ <span class="label label-info">Result Updating</span>
+ </td>
+ <td>
+ <p>Similar to a <b>GroupBy Aggregation</b>. Groups the rows on the
grouping keys with a following running table aggregation operator to aggregate
rows group-wise. The difference from an AggregateFunction is that
TableAggregateFunction may return 0 or more records for a group. You have to
close the "flatAggregate" with a select statement. And the select statement
does not support * and aggregate functions.</p>
Review comment:
IMO, the select statement can support *
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