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https://issues.apache.org/jira/browse/TAJO-1112?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14172160#comment-14172160
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ASF GitHub Bot commented on TAJO-1112:
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Github user jihoonson commented on the pull request:
https://github.com/apache/tajo/pull/200#issuecomment-59176888
@mvhlong sorry for confusing.
I first intended that using NumericDatum will be useful for the later
histogram extension.
However, you are right. Double can contain a broad range of numeric types,
and TEXT can be mapped to a numeric value. I missed it.
In addition, the histogram is stored in only the catalog, so we don't need
to use Datum.
Thanks for your explanation!
> Implement histogram interface and a candidate histogram
> -------------------------------------------------------
>
> Key: TAJO-1112
> URL: https://issues.apache.org/jira/browse/TAJO-1112
> Project: Tajo
> Issue Type: Sub-task
> Reporter: Long Mvh
> Assignee: Long Mvh
>
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