Hi followers,
The [CALCITE-4924]
<https://issues.apache.org/jira/browse/CALCITE-4924> needs some advice on
how to fix it.
Now, The aggregate functions about Covariance return the wrong data
type, According to the ISO-SQL-2016, This is a bug need to fix. And it
blocked [CALCITE-4871] <https://issues.apache.org/jira/browse/CALCITE-4871>. If
you are interested, please check it on JIRA [description and comment] and
give some advice.
