drill-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Jacques Nadeau (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DRILL-1988) join returned maps are all empty
Date Mon, 19 Jan 2015 23:55:36 GMT

     [ https://issues.apache.org/jira/browse/DRILL-1988?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jacques Nadeau updated DRILL-1988:
----------------------------------
    Assignee: Hanifi Gunes  (was: Chris Westin)

> join returned maps are all empty
> --------------------------------
>
>                 Key: DRILL-1988
>                 URL: https://issues.apache.org/jira/browse/DRILL-1988
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Execution - Flow
>    Affects Versions: 0.8.0
>            Reporter: Chun Chang
>            Assignee: Hanifi Gunes
>            Priority: Critical
>
> #Fri Jan 09 20:39:31 EST 2015
> git.commit.id.abbrev=487d98e
> For complex json type, a join query returned all maps with empty value. The actual data
has empty maps for some rows, but mostly with value. Data can be downloaded from:
> https://s3.amazonaws.com/apache-drill/files/complex.json.gz
> {code}
> 0: jdbc:drill:schema=dfs.drillTestDirComplexJ> select a.id, a.soa[3].str, b.soa[3].str,
a.ooa[1].fl from `complex.json` a inner join `complex.json` b on a.soa[3].str=b.soa[3].str
order by a.id limit 10;
> +------------+------------+------------+------------+
> |     id     |   EXPR$1   |   EXPR$2   |   EXPR$3   |
> +------------+------------+------------+------------+
> | 1          | here is a string at row 1 | here is a string at row 1 | {}         |
> | 2          | here is a string at row 2 | here is a string at row 2 | {}         |
> | 3          | here is a string at row 3 | here is a string at row 3 | {}         |
> | 4          | here is a string at row 4 | here is a string at row 4 | {}         |
> | 5          | here is a string at row 5 | here is a string at row 5 | {}         |
> | 6          | here is a string at row 6 | here is a string at row 6 | {}         |
> | 7          | here is a string at row 7 | here is a string at row 7 | {}         |
> | 8          | here is a string at row 8 | here is a string at row 8 | {}         |
> | 9          | here is a string at row 9 | here is a string at row 9 | {}         |
> | 10         | here is a string at row 10 | here is a string at row 10 | {}         |
> +------------+------------+------------+------------+
> {code}
> As you can see from the following query, maps is not empty for most of the row IDs.
> {code}
> 0: jdbc:drill:schema=dfs.drillTestDirComplexJ> select a.id, a.ooa[1].fl from `complex.json`
a limit 10;
> +------------+------------+
> |     id     |   EXPR$1   |
> +------------+------------+
> | 1          | {"f1":1.6789,"f2":54331.0} |
> | 2          | {}         |
> | 3          | {"f1":3.6789,"f2":54351.0} |
> | 4          | {"f1":4.6789,"f2":54361.0} |
> | 5          | {"f1":5.6789,"f2":54371.0} |
> | 6          | {}         |
> | 7          | {"f1":7.6789,"f2":54391.0} |
> | 8          | {}         |
> | 9          | {"f1":9.6789,"f2":54411.0} |
> | 10         | {"f1":10.6789,"f2":54421.0} |
> +------------+------------+
> {code}
> physical plan:
> {code}
> 0: jdbc:drill:schema=dfs.drillTestDirComplexJ> explain plan for select a.id, a.soa[3].str,
b.soa[3].str, a.ooa[1].fl from `complex.json` a inner join `complex.json` b on a.soa[3].str=b.soa[3].str
order by a.id limit 10;
> +------------+------------+
> |    text    |    json    |
> +------------+------------+
> | 00-00    Screen
> 00-01      Project(id=[$0], EXPR$1=[$1], EXPR$2=[$2], EXPR$3=[$3])
> 00-02        SelectionVectorRemover
> 00-03          Limit(fetch=[10])
> 00-04            SingleMergeExchange(sort0=[0 ASC])
> 01-01              SelectionVectorRemover
> 01-02                TopN(limit=[10])
> 01-03                  HashToRandomExchange(dist0=[[$0]])
> 02-01                    Project(id=[$0], EXPR$1=[$2], EXPR$2=[$5], EXPR$3=[$3])
> 02-02                      HashJoin(condition=[=($1, $4)], joinType=[inner])
> 02-04                        HashToRandomExchange(dist0=[[$1]])
> 03-01                          Project(id=[$2], $f4=[ITEM(ITEM($1, 3), 'str')], ITEM=[ITEM(ITEM($1,
3), 'str')], ITEM3=[ITEM(ITEM($0, 1), 'fl')])
> 03-02                            Scan(groupscan=[EasyGroupScan [selectionRoot=/drill/testdata/complex_type/json/complex.json,
numFiles=1, columns=[`id`, `soa`[3].`str`, `ooa`[1].`fl`], files=[maprfs:/drill/testdata/complex_type/json/complex.json]]])
> 02-03                        Project($f40=[$0], ITEM0=[$1])
> 02-05                          HashToRandomExchange(dist0=[[$0]])
> 04-01                            Project($f4=[ITEM(ITEM($0, 3), 'str')], ITEM=[ITEM(ITEM($0,
3), 'str')])
> 04-02                              Scan(groupscan=[EasyGroupScan [selectionRoot=/drill/testdata/complex_type/json/complex.json,
numFiles=1, columns=[`soa`[3].`str`], files=[maprfs:/drill/testdata/complex_type/json/complex.json]]])
> {code}



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message