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https://issues.apache.org/jira/browse/SPARK-57820?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Max Gekk updated SPARK-57820:
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Shepherd: Max Gekk
> Support nanosecond-precision timestamps in time_bucket
> ------------------------------------------------------
>
> Key: SPARK-57820
> URL: https://issues.apache.org/jira/browse/SPARK-57820
> 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-56822 (timestamps with nanosecond
> precision).
> h2. Problem
> {{TimeBucket}} (datetimeExpressions.scala ~L4433-4498) types its
> timestamp/origin args as {{AnyTimestampType}} and casts the timestamp to
> {{Long}} micros in {{nullSafeEval}}, so nanosecond timestamps are rejected /
> narrowed.
> h2. Goal
> Bucket a nanosecond timestamp by an interval width, returning the same
> nanosecond type/precision with {{nanosWithinMicro}} handled consistently with
> the bucket width.
> h2. Scope
> Accept {{AnyTimestampNanoType}}; add a {{TimestampNanosVal}} bucketing path.
> h2. Acceptance criteria
> * {{time_bucket(width, ts_nanos[, origin])}} returns aligned nanosecond
> buckets; microsecond behavior unchanged.
> h2. Testing
> {{DateExpressionsSuite}}; nanos golden files.
> h2. Dependencies
> None - independent.
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