I think it's a Calcite data type that is used as a placeholder by Drill
in late binding scenarios, i.e. when Drill doesn't yet know the actual
type. If you run
select typeOf(employee_id) from foodmart limit 1
you should see the resolved data type. This data type is the one that
will be matched against the AVG function.
On 2022/04/05 07:09, Wes Peng wrote:
what does ANY data type mean?
apache drill (dfs.pyh)> desc foodmart;
+-----------------+-----------+-------------+
| COLUMN_NAME | DATA_TYPE | IS_NULLABLE |
+-----------------+-----------+-------------+
| employee_id | ANY | YES |
| full_name | ANY | YES |
| position_title | ANY | YES |
| birth_date | ANY | YES |
| salary | ANY | YES |
| education_level | ANY | YES |
+-----------------+-----------+-------------+
6 rows selected (0.534 seconds)
I saw this type can be used in aggregate functions. doesn't it need a
cast() translation?
apache drill (dfs.pyh)> select avg(salary) as avgsal from foodmart;
+--------------------+
| avgsal |
+--------------------+
| 4019.6017316017314 |
+--------------------+
1 row selected (0.452 seconds)
Thanks
