Ted Dunning created DRILL-4754:
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Summary: Missing values are not missing
Key: DRILL-4754
URL: https://issues.apache.org/jira/browse/DRILL-4754
Project: Apache Drill
Issue Type: Bug
Reporter: Ted Dunning
If I have a query which reads from a JSON file where a field is a list or is
missing, then the records where the field should missing will instead have a
value for that field that is an empty list:
<verbatim>
0: jdbc:drill:> select * from maprfs.ted.`bug.json`;
+----+--------+------+
| a | b | c |
+----+--------+------+
| 3 | [3,2] | xyz |
| 7 | [] | wxy |
+----+--------+------+
2 rows selected (1.279 seconds)
</verbatim>
where the file in question contains these two records:
<verbatim>
{'a':3, 'b':[3,2], 'c':'xyz'}
{'a':7, 'c':'wxy'}
</verbatim>
The problem is in the second record of the result. I would have expected b to
have had the value NULL.
I am using drill-1.6.0.
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