[jira] [Assigned] (DRILL-1692) select * on mongo join returns invalid results

["Hanifi Gunes (JIRA)" <ji...@apache.org>]

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

Hanifi Gunes reassigned DRILL-1692:
-----------------------------------

    Assignee: Hanifi Gunes  (was: Jason Altekruse)

> 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: Hanifi Gunes
>             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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