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https://issues.apache.org/jira/browse/HIVE-30094?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated HIVE-30094:
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Labels: pull-request-available (was: )
> Use microsecond timestamp precision for Iceberg Z-ordering
> ----------------------------------------------------------
>
> Key: HIVE-30094
> URL: https://issues.apache.org/jira/browse/HIVE-30094
> Project: Hive
> Issue Type: Bug
> Reporter: Raghav Aggarwal
> Assignee: Raghav Aggarwal
> Priority: Major
> Labels: pull-request-available
>
> As per the [Iceberg Spec|https://iceberg.apache.org/spec/#primitive-types],
> the {{timestamp}} and {{timestamptz}} primitive types are strictly
> represented as integers using *microseconds* from the unix epoch.
> However, Hive's ZOrder UDF ({{{}GenericUDFIcebergZorder{}}}) is truncating
> timestamps to *milliseconds* when computing the Z-Order curve.
> This can cause wrong grouping/clustering.
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