Github user tedyu commented on a diff in the pull request:
https://github.com/apache/flink/pull/4404#discussion_r131511583
--- Diff: docs/dev/table/sql.md ---
@@ -497,6 +497,23 @@ FROM (
{% endhighlight %}
</td>
</tr>
+
+ <tr>
+ <td>
+ <strong>In</strong><br>
+ <span class="label label-primary">Batch</span>
+ </td>
+ <td>
+ Returns true if an expression exists in a given table sub-query. The
sub-query table must consist of one column. This column must have the same data
type as the expression.
--- End diff --
Should the syntax be enhanced so that user can specify one column in the
table with multiple columns ?
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
