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https://issues.apache.org/jira/browse/ARROW-11183?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Neville Dipale resolved ARROW-11183.
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      Assignee: Neville Dipale
    Resolution: Fixed

Hi [~aldanor], please note that this is now implemented, and you can write 
nanosecond timestamps from the Arrow writer, or manually using the 
LogicalType::TIMESTAMP(NANOS) option

> [Rust] [Parquet] LogicalType::TIMESTAMP_NANOS missing
> -----------------------------------------------------
>
>                 Key: ARROW-11183
>                 URL: https://issues.apache.org/jira/browse/ARROW-11183
>             Project: Apache Arrow
>          Issue Type: Improvement
>            Reporter: Ivan Smirnov
>            Assignee: Neville Dipale
>            Priority: Major
>             Fix For: 4.0.0
>
>
> There's UnitTime::NANOS in parquet-format, but no nanosecond timestamp 
> support (seemingly) in schema's LogicalType. What is needed to add support 
> for nanosecond timestamps in Rust Parquet?



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