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https://issues.apache.org/jira/browse/ARROW-835?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16210452#comment-16210452
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Jeff Reback commented on ARROW-835:
-----------------------------------
computationally using ns precesion causes overflow a fair amount, range is only
106k days (though it’s easily detected); might consider using an alternative
storage (eg store days in an int32 and then ns in a int64), but this might be
at odds with other systems
> [Format] Add Timedelta type to describe time intervals
> ------------------------------------------------------
>
> Key: ARROW-835
> URL: https://issues.apache.org/jira/browse/ARROW-835
> Project: Apache Arrow
> Issue Type: Improvement
> Reporter: Jeff Reback
> Assignee: Wes McKinney
> Priority: Minor
> Fix For: 0.8.0
>
>
> xref https://github.com/apache/arrow/pull/551 and
> https://github.com/apache/arrow/pull/551#issuecomment-294325969
> this will allow round-tripping of pandas ``Timedelta`` and numpy
> ``timedelt64[ns]`` types. The will have a similar TimeUnit to TimestampType
> (s, us, ms, ns). Possible impl include making this pure 64-bit.
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