[jira] [Created] (DRILL-4160) Order By on a flattened column throws SchemaChangeException - Missing function implementation

["Abhishek Girish (JIRA)" <ji...@apache.org>]

Abhishek Girish created DRILL-4160:
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             Summary: Order By on a flattened column throws SchemaChangeException - Missing function implementation
                 Key: DRILL-4160
                 URL: https://issues.apache.org/jira/browse/DRILL-4160
             Project: Apache Drill
          Issue Type: Bug
          Components: SQL Parser, Storage - JSON
            Reporter: Abhishek Girish


Query with an ORDER BY clause on a flattened column fails:
{code}
> select `name`, `type`, flatten(kvgen(`compliments`)) as `compliments` from `user` order by `name`, `type`, `compliments` limit 2;
Error: SYSTEM ERROR: SchemaChangeException: Failure while trying to materialize incoming schema.  Errors:
Error in expression at index 2.  Error: Missing function implementation: [hash64asdouble(MAP-REQUIRED, BIGINT-REQUIRED)].  Full expression: null..
Fragment 3:0
[Error Id: 3b3d3224-953a-46a2-8caa-fa6949e58ffd on abhi1:31010] (state=,code=0)
{code}
Query without order by on the flatten column executes fine. 
{code}
> select `name`, `type`, flatten(kvgen(`compliments`)) as `compliments` from `user` order by `name`, `type` limit 2;
+--------------------+-------+--------------------------------+
|        name        | type  |          compliments           |
+--------------------+-------+--------------------------------+
|  Kurt              | user  | {"key":"cute","value":1.0}     |
|  Kurt              | user  | {"key":"writer","value":1.0}   |
+--------------------+-------+--------------------------------+
2 rows selected (4.239 seconds)
{code}





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