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From "Chun Chang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-2348) 'null' is not treated correctly when compared with int
Date Sat, 28 Feb 2015 02:26:04 GMT
Chun Chang created DRILL-2348:
---------------------------------

             Summary: 'null' is not treated correctly when compared with int
                 Key: DRILL-2348
                 URL: https://issues.apache.org/jira/browse/DRILL-2348
             Project: Apache Drill
          Issue Type: Bug
            Reporter: Chun Chang
            Priority: Critical


#Wed Feb 25 17:07:31 EST 2015
git.commit.id.abbrev=f7ef5ec

Dataset can be downloaded from 
https://s3.amazonaws.com/apache-drill/files/complex.json.gz

The following three query results do not add up.

{code}
0: jdbc:drill:schema=dfs.drillTestDirComplexJ> select count(tt.gbyi) from (select t.gbyi
gbyi, t.ooa[0] ooa0, t.ooa[1] ooa1, t.ooa[2] ooa2 from `complex.json` t) tt where tt.ooa0.`in`
<> tt.ooa1.`in`;
+------------+
|   EXPR$0   |
+------------+
+------------+
No rows selected (22.952 seconds)
0: jdbc:drill:schema=dfs.drillTestDirComplexJ> select count(tt.gbyi) from (select t.gbyi
gbyi, t.ooa[0] ooa0, t.ooa[1] ooa1, t.ooa[2] ooa2 from `complex.json` t) tt where tt.ooa0.`in`
= tt.ooa1.`in`;
+------------+
|   EXPR$0   |
+------------+
| 949954     |
+------------+
1 row selected (23.053 seconds)
0: jdbc:drill:schema=dfs.drillTestDirComplexJ> select count(tt.gbyi) from (select t.gbyi
gbyi, t.ooa[0] ooa0, t.ooa[1] ooa1, t.ooa[2] ooa2 from `complex.json` t) tt;
+------------+
|   EXPR$0   |
+------------+
| 1000000    |
+------------+
1 row selected (13.242 seconds)
{code}

Without any comparison condition, the total count is 1,000,000. This is correct. But the two
query results with <> and = does not add up to the total. I am not sure if this has
anything to do with subquery with complex type. Will investigate more.



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