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https://issues.apache.org/jira/browse/TAJO-345?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jihoon Son updated TAJO-345:
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Attachment: TAJO-345.patch
I attached a patch.
> MergeScanner should support projectable storages
> ------------------------------------------------
>
> Key: TAJO-345
> URL: https://issues.apache.org/jira/browse/TAJO-345
> Project: Tajo
> Issue Type: Bug
> Components: storage
> Reporter: Jihoon Son
> Assignee: Jihoon Son
> Fix For: 0.8-incubating
>
> Attachments: TAJO-345.patch
>
>
> MergeScanner sequentially scans multiple fragments of the same table.
> If the table is stored as a columnar file such as RCFile, MergeScanner should
> read only target columns.
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