Github user hequn8128 commented on a diff in the pull request:
https://github.com/apache/flink/pull/6282#discussion_r204230536
--- Diff: docs/dev/table/tableApi.md ---
@@ -4490,6 +4490,16 @@ dateFormat(TIMESTAMP, STRING)
</td>
</tr>
+ <tr>
+ <td>
+ {% highlight text %}
+timestampDiff(unit, timestamp1, timestamp2)
+{% endhighlight %}
+ </td>
+ <td>
+ <p>Returns the (signed) number of timeUnit intervals between
timestamp1 and timestamp2. The unit for the interval is given by the unit
argument, which should be one of the following values: <code>SECOND</code>,
<code>MINUTE</code>, <code>HOUR</code>, <code>DAY</code>, <code>MONTH</code>,
or <code>YEAR</code>. E.g. <code>timestampDiff(TimeIntervalUnit.DAY,
'2003-01-02'.toDate, '2003-01-03'.toDate)</code> leads to <code>1</code>.</p>
--- End diff --
timestamp1 and timestamp2 => datetime1 and datetime2
---
