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https://issues.apache.org/jira/browse/CARBONDATA-2528?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Prasanna Ravichandran closed CARBONDATA-2528.
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Closed.
> MV Datamap - When the MV is created with the order by, then when we execute
> the corresponding query defined in MV with order by, then the data is not
> accessed from the MV.
> ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: CARBONDATA-2528
> URL: https://issues.apache.org/jira/browse/CARBONDATA-2528
> Project: CarbonData
> Issue Type: Bug
> Components: data-query
> Environment: 3 node Opensource ANT cluster. (Opensource Hadoop 2.7.2+
> Opensource Spark 2.2.1+ Opensource Carbondata 1.3.1)
> Reporter: Prasanna Ravichandran
> Assignee: Ravindra Pesala
> Priority: Minor
> Labels: CarbonData, MV, Materialistic_Views
> Fix For: 1.5.0, 1.4.1
>
> Attachments: MV_orderby.docx, data.csv
>
> Time Spent: 6h
> Remaining Estimate: 0h
>
> When the MV is created with the order by condition, then when we execute the
> corresponding query defined in MV along with order by, then the data is not
> accessed from the MV. The data is being accessed from the maintable only.
> Test queries:
> create datamap MV_order using 'mv' as select
> empno,sum(salary)+sum(utilization) as total from originTable group by empno
> order by empno;
> create datamap MV_desc_order using 'mv' as select
> empno,sum(salary)+sum(utilization) as total from originTable group by empno
> order by empno DESC;
> rebuild datamap MV_order;
> rebuild datamap MV_desc_order;
> explain select empno,sum(salary)+sum(utilization) as total from originTable
> group by empno order by empno;
> explain select empno,sum(salary)+sum(utilization) as total from originTable
> group by empno order by empno DESC;
> Expected result: MV with order by condition should access data from the MV
> table only.
>
> Please see the attached document for more details.
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