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https://issues.apache.org/jira/browse/SPARK-59364?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated SPARK-59364:
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Labels: pull-request-available (was: )
> Build external UDF payload and Init messages
> --------------------------------------------
>
> Key: SPARK-59364
> URL: https://issues.apache.org/jira/browse/SPARK-59364
> Project: Spark
> Issue Type: Sub-task
> Components: UDF
> Affects Versions: 4.4.0
> Reporter: Haiyang Sun
> Priority: Major
> Labels: pull-request-available
>
> SPARK-55278 introduces a language-neutral UDF worker framework, but it lacks
> a generic contract for constructing the per-session Init message required by
> a worker.
> Add:
> - Declarative worker session requirements for environment variables,
> Spark/SQL configuration, and the Spark files directory.
> - Typed Init fields for resolved session context.
> - Invocation identity, logical input schema, and named-argument metadata.
> - A versioned payload format for scalar Arrow Python UDFs.
> - Generic Init construction that forwards only requested context and
> refreshes metadata after Catalyst rewrites.
> - Unit coverage for defaults, validation, rewritten inputs, worker
> configuration, and payload compatibility.
> Switching existing Python UDF execution to the unified worker framework is
> outside this ticket.
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