[jira] [Updated] (SPARK-57848) Support the TIME data type in approx_top_k

["Max Gekk (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-57848?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Max Gekk updated SPARK-57848:
-----------------------------
    Shepherd: Max Gekk

> Support the TIME data type in approx_top_k
> ------------------------------------------
>
>                 Key: SPARK-57848
>                 URL: https://issues.apache.org/jira/browse/SPARK-57848
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>    Affects Versions: 4.3.0
>            Reporter: Max Gekk
>            Priority: Major
>
> This sub-task is part of the umbrella SPARK-57550 (extend support for the TIME data type).
> h2. Problem
> {{ApproxTopK}} (aggregate/ApproxTopKAggregates.scala) rejects {{TimeType}}: {{isDataTypeSupported}} whitelist (~L227-234) excludes it, and {{createItemsSketch}} / {{genSketchSerDe}} (~L246-260) have no TIME arm. Not covered by SPARK-57557.
> h2. Goal
> Support {{TimeType}} in {{approx_top_k}}, keying the sketch on the nanos-of-day {{Long}}.
> h2. Scope
> Add {{TimeType}} to {{isDataTypeSupported}} and to the sketch (de)serialization paths; return TIME-typed items.
> h2. Acceptance criteria
> * {{approx_top_k}} over a TIME column returns correct top-k TIME values and counts.
> h2. Testing
> The {{ApproxTopK}}-related suite.
> h2. Dependencies
> None - independent.



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