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From "Steven Phillips (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (DRILL-1692) select * on mongo join returns invalid results
Date Tue, 24 Feb 2015 07:45:11 GMT

     [ https://issues.apache.org/jira/browse/DRILL-1692?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Steven Phillips reassigned DRILL-1692:
--------------------------------------

    Assignee: Steven Phillips  (was: Adam Gilmore)

> select * on mongo join returns invalid results
> ----------------------------------------------
>
>                 Key: DRILL-1692
>                 URL: https://issues.apache.org/jira/browse/DRILL-1692
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Storage - MongoDB
>    Affects Versions: 0.6.0
>         Environment: select * queries on mongo joins
>            Reporter: B Anil Kumar
>            Assignee: Steven Phillips
>             Fix For: 0.8.0
>
>
> select * on mongo joins gives improper results. Need to modify the schema handling logic
in the case of 'select *' logic in MongoRecordReader.
> For example when we fire a below query on mongo.employee.`join1` table, the results are
as below.
> SELECT  * FROM mongo.employee.`join1` t1 JOIN  mongo.employee.`join1` t2 ON  t1.`employee_id`
= t2.`employee_id`
> sample documents in mongo.employee.`join1` table:
> { "employee_id" : 1 , "first_name" : "Anil"} 
> { "employee_id" : 2 , "first_name" : "Kamesh"}
> Results:
> {noformat}
> { "employee_id" : 1 , "first_name" : "Anil"}	{ "employee_id" : 1 , "first_name" : "Anil"}
> { "employee_id" : 1 , "first_name" : "Anil"}	{ "employee_id" : 2 , "first_name" : "Kamesh"}
> { "employee_id" : 2 , "first_name" : "Kamesh"}	{ "employee_id" : 1 , "first_name" : "Anil"}
> { "employee_id" : 2 , "first_name" : "Kamesh"}	{ "employee_id" : 2 , "first_name" : "Kamesh"}
> {noformat}



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