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https://issues.apache.org/jira/browse/DRILL-2083?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Venki Korukanti updated DRILL-2083:
-----------------------------------
Assignee: Steven Phillips (was: Venki Korukanti)
> order by on large dataset returns wrong results
> -----------------------------------------------
>
> Key: DRILL-2083
> URL: https://issues.apache.org/jira/browse/DRILL-2083
> Project: Apache Drill
> Issue Type: Bug
> Components: Execution - Data Types, Execution - Relational Operators
> Affects Versions: 0.8.0
> Reporter: Chun Chang
> Assignee: Steven Phillips
> Priority: Critical
> Fix For: 0.9.0
>
> Attachments: DRILL-2083.patch
>
>
> #Mon Jan 26 14:10:51 PST 2015
> git.commit.id.abbrev=3c6d0ef
> Test data has 1 million rows and can be accessed at
> http://apache-drill.s3.amazonaws.com/files/complex.json.gz
> {code}
> 0: jdbc:drill:schema=dfs.drillTestDirComplexJ> select count (t.id) from
> `complex.json` t;
> +------------+
> | EXPR$0 |
> +------------+
> | 1000000 |
> +------------+
> {code}
> But order by returned 30 more rows.
> {code}
> 0: jdbc:drill:schema=dfs.drillTestDirComplexJ> select t.id from
> `complex.json` t order by t.id;
> ....
> | 999997 |
> | 999998 |
> | 999999 |
> | 1000000 |
> +------------+
> 1,000,030 rows selected (19.449 seconds)
> {code}
> physical plan
> {code}
> 0: jdbc:drill:schema=dfs.drillTestDirComplexJ> explain plan for select t.id
> from `complex.json` t order by t.id;
> +------------+------------+
> | text | json |
> +------------+------------+
> | 00-00 Screen
> 00-01 SingleMergeExchange(sort0=[0 ASC])
> 01-01 SelectionVectorRemover
> 01-02 Sort(sort0=[$0], dir0=[ASC])
> 01-03 HashToRandomExchange(dist0=[[$0]])
> 02-01 Scan(groupscan=[EasyGroupScan
> [selectionRoot=/drill/testdata/complex_type/json/complex.json, numFiles=1,
> columns=[`id`],
> files=[maprfs:/drill/testdata/complex_type/json/complex.json]]])
> {code}
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