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Posted to issues@drill.apache.org by "Chun Chang (JIRA)" <ji...@apache.org> on 2015/04/28 03:08:06 UTC
[jira] [Closed] (DRILL-1945) max() of all 0.0 value gives wrong
results
[ https://issues.apache.org/jira/browse/DRILL-1945?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Chun Chang closed DRILL-1945.
-----------------------------
Assignee: Chun Chang (was: Mehant Baid)
already verified. test case exist (complex132.q).
> max() of all 0.0 value gives wrong results
> ------------------------------------------
>
> Key: DRILL-1945
> URL: https://issues.apache.org/jira/browse/DRILL-1945
> Project: Apache Drill
> Issue Type: Bug
> Components: Functions - Drill
> Affects Versions: 0.8.0
> Reporter: Chun Chang
> Assignee: Chun Chang
> Attachments: DRILL-1945.patch
>
>
> #Fri Jan 02 21:20:47 EST 2015
> git.commit.id.abbrev=b491cdb
> test data can be accessed from https://s3.amazonaws.com/apache-drill/files/complex.json.gz
> Using the above dataset, the t.sfa[0] field is all 0.0.
> {code}
> 0: jdbc:drill:schema=dfs.drillTestDirMondrian> select t.sfa[0] from `complex.json` t limit 10;
> +------------+
> | EXPR$0 |
> +------------+
> | 0.0 |
> | 0.0 |
> | 0.0 |
> | 0.0 |
> | 0.0 |
> | 0.0 |
> | 0.0 |
> | 0.0 |
> | 0.0 |
> | 0.0 |
> +------------+
> 10 rows selected (0.083 seconds)
> 0: jdbc:drill:schema=dfs.drillTestDirMondrian> select t.sfa[0] from `complex.json` t where t.sfa[0] <> 0.0;
> +------------+
> | EXPR$0 |
> +------------+
> +------------+
> No rows selected (15.616 seconds)
> {code}
> The max value of this field in a group by query gives wrong results.
> {code}
> 0: jdbc:drill:schema=dfs.drillTestDirMondrian> select mod(trunc(t.sfa[1]), 10) sfamod, max(t.sfa[0]) sfamax from `complex.json` t group by mod(trunc(t.sfa[1]), 10);
> +------------+------------+
> | sfamod | sfamax |
> +------------+------------+
> | 1.0 | 4.9E-324 |
> | 2.0 | 4.9E-324 |
> | 3.0 | 4.9E-324 |
> | 4.0 | 4.9E-324 |
> | 5.0 | 4.9E-324 |
> | 6.0 | 4.9E-324 |
> | 7.0 | 4.9E-324 |
> | 8.0 | 4.9E-324 |
> | 9.0 | 4.9E-324 |
> | 0.0 | 4.9E-324 |
> +------------+------------+
> 10 rows selected (14.474 seconds)
> {code}
> simple max() on the field also gives the same wrong result.
> {code}
> 0: jdbc:drill:schema=dfs.drillTestDirMondrian> select max(t.sfa[0]) sfamax from `complex.json` t;
> +------------+
> | sfamax |
> +------------+
> | 4.9E-324 |
> +------------+
> 1 row selected (15.666 seconds)
> {code}
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