[jira] [Created] (DRILL-1767) kvgen ignores null scalars but not empty maps in the output

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

Rahul Challapalli created DRILL-1767:
----------------------------------------

             Summary: kvgen ignores null scalars but not empty maps in the output
                 Key: DRILL-1767
                 URL: https://issues.apache.org/jira/browse/DRILL-1767
             Project: Apache Drill
          Issue Type: Bug
          Components: Functions - Drill, Storage - JSON
            Reporter: Rahul Challapalli


git.commit.id.abbrev=108d29f

Dataset :
{code}
{
 "id":1,
 "keys":{"m1":{"v7":{"k1":"k2"}},"m2":{"v1":"abc","v2":{"w1":0.24}}}
}
{
 "id":1,
 "keys":{"m1":{"v7":{"k1":"k3"}},"m2":{"v1":"abc","v2":{"w1":0.2}}}
}
{code}


Query :
{code}
select kvgen(keys) from `json_kvgenflatten/temp.json`;
+------------+
|   EXPR$0   |
+------------+
| [{"key":"m1","value":{"v7":{"k1":"k2"},"v2":{}}},{"key":"m2","value":{"v7":{},"v1":"abc","v2":{"w1":0.24}}}] |
| [{"key":"m1","value":{"v7":{"k1":"k3"},"v2":{}}},{"key":"m2","value":{"v7":{},"v1":"abc","v2":{"w1":0.2}}}] |
+------------+
2 rows selected (0.508 seconds)
{code}

In the above output , drill seems to be ignoring the empty scalars (v1) but not empty maps (v2)




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