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https://issues.apache.org/jira/browse/ARROW-13218?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ben Kietzman resolved ARROW-13218.
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Fix Version/s: 5.0.0
Resolution: Fixed
Issue resolved by pull request 10629
[https://github.com/apache/arrow/pull/10629]
> [Doc] Document/clarify conventions for timestamp storage
> --------------------------------------------------------
>
> Key: ARROW-13218
> URL: https://issues.apache.org/jira/browse/ARROW-13218
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Documentation
> Reporter: Weston Pace
> Assignee: Weston Pace
> Priority: Major
> Labels: pull-request-available
> Fix For: 5.0.0
>
> Time Spent: 3h 40m
> Remaining Estimate: 0h
>
> This is related to several mailing list discussions:
> [https://lists.apache.org/thread.html/r017084eed74edbc95810fc049056570f45b0bb034d6eeadd647e8621%40%3Cdev.arrow.apache.org%3E]
> [https://lists.apache.org/thread.html/re349b0b4971acb3e6612ce4fd0346c5a8504e2daf97864087306998c%40%3Cdev.arrow.apache.org%3E]
> [https://lists.apache.org/thread.html/r8216e5de3efd2935e3907ad9bd20ce07e430952f84de69b36337e5eb%40%3Cdev.arrow.apache.org%3E]
> and some votes:
> [https://lists.apache.org/thread.html/rd6b460ffe8eff4f03e3e9d48ad6c796106dd0b3321529751f7c19743%40%3Cdev.arrow.apache.org%3E]
> [https://lists.apache.org/thread.html/r1bdffc76537ae9c12c37396880087fee9c0eec9000bf6ed4c9850c44%40%3Cdev.arrow.apache.org%3E]
> TBD
>
> The consensus appears to be that there are (conceptually) at least three
> temporal types, (Java calls these Instant, LocalDateTime, and ZonedDateTime).
> Some of these types could map to multiple physical types (e.g. ZonedDateTime
> could be stored as a Timestamp or a Date32/Time64 pair). Some even have
> multiple encoding schemes for a given representation (there are multiple ways
> to encode a LocalDateTime into an 8 byte timestamp field).
> In addition, it appears the consensus is that Arrow does not need three
> first-class types. Instead the documentation should be updated to clearly
> define a recommended convention for encoding the various conceptual types.
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