[jira] [Created] (DRILL-3284) Document incompatibility between drill's to_date and hive's unix_timestamp

["Rahul Challapalli (JIRA)" <ji...@apache.org>]

Rahul Challapalli created DRILL-3284:
----------------------------------------

             Summary: Document incompatibility between drill's to_date and hive's unix_timestamp
                 Key: DRILL-3284
                 URL: https://issues.apache.org/jira/browse/DRILL-3284
             Project: Apache Drill
          Issue Type: Bug
          Components: Documentation, Functions - Hive
            Reporter: Rahul Challapalli
            Assignee: Bridget Bevens



The below query from drill produces wrong results because unix_timestamp (function from hive) returns the value in seconds while to_date treats its input in milliseconds.
{code}
select to_date(unix_timestamp('1998-05-06', 'yyyy-MM-dd')) from dummy limit 1;
+-------------+
|   EXPR$0    |
+-------------+
| 1970-01-11  |
+-------------+
{code} 

In order to make this work we should use the below query
{code}
select to_date(unix_timestamp('1998-05-06', 'yyyy-MM-dd')*1000) from dummy limit 1;
+-------------+
|   EXPR$0    |
+-------------+
| 1998-05-06  |
+-------------+
{code}

If this is not a bug on drill's side, we should atleast document this 



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