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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