dawidwys commented on a change in pull request #14101:
URL: https://github.com/apache/flink/pull/14101#discussion_r525272626
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File path: docs/dev/table/functions/systemFunctions.md
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@@ -4884,12 +4884,18 @@ MAP.at(ANY)
<tr>
<td>
{% highlight text %}
-ROW(value1, [, value2]*)
-(value1, [, value2]*)
+-- implicit constructor with parenthesis
+(value1 [, value2]*)
+
+-- explicit ROW constructor
+ROW(value1 [, value2]*)
{% endhighlight %}
</td>
<td>
<p>Returns a row created from a list of values (<i>value1,
value2,</i>...).</p>
+ <p>Note: The implicit row constructor supports arbitrary expressions
as fields but requires
+ at least two fields. The explicit row constructor can deal with an
arbitrary number of fields
+ but does not support all kinds of field expressions well currently.</p>
Review comment:
nit: Maybe we could link to the JIRA issues targeted at fixing it? I am
a bit afraid we might forget to update this section when we fix the issue
properly. With a link there is a slightly better chance users will be able
figure it out if it was fixed.
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