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Posted to dev@arrow.apache.org by "Julien Le Dem (JIRA)" <ji...@apache.org> on 2016/10/03 22:23:21 UTC

[jira] [Created] (ARROW-315) Finalize timestamp field

Julien Le Dem created ARROW-315:
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             Summary: Finalize timestamp field
                 Key: ARROW-315
                 URL: https://issues.apache.org/jira/browse/ARROW-315
             Project: Apache Arrow
          Issue Type: Improvement
          Components: Format
            Reporter: Julien Le Dem
            Assignee: Julien Le Dem


support int64 UNIX timestamps with a particular resolution.

Parquet supports timestamp millis and micros (no nanos)
https://github.com/apache/parquet-format/blob/master/LogicalTypes.md#datetime-types

currently Arrow timestamps have a timezone field. 
https://github.com/apache/arrow/blob/master/format/Message.fbs#L67
proposal to change timestamp as follows:
- remove "timestamp" field and say it's UTC
- add unit field (MICROS | MILLIS)






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