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