Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/2468#discussion_r79824678
--- Diff: docs/dev/table_api.md ---
@@ -1578,6 +1578,17 @@ localTimestamp()
</td>
</tr>
+ <tr>
+ <td>
+ {% highlight java %}
+temporalOverlaps(TIMEPOINT, TEMPORAL, TIMEPOINT, TEMPORAL)
+{% endhighlight %}
+ </td>
+ <td>
+ <p>Determines whether two anchored time intervals overlap. It
evaluates <code>leftTemporal >= rightTimePoint && rightTemporal >=
leftTimePoint</code>. E.g. <code>temporalOverlaps("2:55:00".toTime, 1.hour,
"3:30:00".toTime, 2.hour)</code> leads to true.</p>
--- End diff --
I think the condition is hard to understand because it is not clear what a
`Temporal` is. How about we say that time point and temporal are transformed
into a range defined by two timestamps (start, end) and give the condition as
`leftEnd >= rightStart && rightEnd >= leftStart`?
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