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https://issues.apache.org/jira/browse/SPARK-54203?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Max Gekk resolved SPARK-54203.
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Fix Version/s: 4.3.0
Resolution: Fixed
Issue resolved by pull request 56613
[https://github.com/apache/spark/pull/56613]
> Support TimeType in RowToColumnConverter
> ----------------------------------------
>
> Key: SPARK-54203
> URL: https://issues.apache.org/jira/browse/SPARK-54203
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 4.1.0
> Reporter: Bruce Robbins
> Assignee: Max Gekk
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.3.0
>
>
> h2. What
> Add a {{TimeType}} branch to {{RowToColumnConverter}} so rows containing TIME
> columns can be
> converted to columnar (Arrow/columnar batch) format.
> h2. Why (confirmed needed)
> {{RowToColumnConverter.getConverterForType}} in
> {{sql/core/.../execution/Columnar.scala}} handles {{LongType | TimestampType |
> TimestampNTZType | DayTimeIntervalType}} (all long-backed) but has no
> {{TimeType}} case, so
> a TIME column falls through to {{unsupportedDataTypeError}}. This blocks
> row-to-column
> conversion paths (e.g. {{ColumnarToRow}}/{{RowToColumnar}} transitions,
> vectorized
> execution) for TIME. (Supersedes the original "same change as TimestampNTZ in
> commit
> 47276ab9902" note - the change is required, not speculative.)
> h2. Scope
> * Add the {{TimeType}} case to {{getConverterForType}} using the long-backed
> ({{LongConverter}}) path, since TIME is stored as nanos-of-day {{Long}}.
> * Confirm the on/off-heap column vectors already round-trip TIME (they do -
> TIME is in the
> {{longData}} group).
> h2. Acceptance criteria
> * A DataFrame with a TIME column survives a row<->column round-trip (e.g.
> cached columnar,
> or a plan that inserts {{RowToColumnar}}).
> * Test added to {{ColumnarBatchSuite}} / the Columnar conversion tests.
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