Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/3046#discussion_r96860219
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/api/table.scala
---
@@ -930,3 +921,46 @@ class GroupWindowedTable(
}
}
+
+
+class WindowedTable(
+ private[flink] val table: Table,
+ private[flink] val window: Window) {
+
+ /**
+ * Groups the elements on some keys (window alias or group keys). It
should be noted that one
+ * window alias MUST be included in the key list. Use this function
before a selection with
+ * aggregations to perform the aggregation on a per-group basis.
Similar to a SQL GROUP BY
+ * statement.
+ *
+ * Example:
+ *
+ * {{{
+ * tab.groupBy('windowAlias, 'key).select('key, 'value.avg)
--- End diff --
add the `window()` call to the example to show where the `'windowAlias`
comes from?
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