xudong963 commented on issue #21650:
URL: https://github.com/apache/datafusion/issues/21650#issuecomment-4258795558
@gabotechs yes
And taskContext satisfies all four constraints:
- A new TaskContext is created for each query run → State is naturally
isolated
- Passed via Arc<TaskContext> to all execute(partition, context) calls
within the same plan → Shared within the same run
- Does not belong to any plan node → Shared across nodes
- Plan carries no execution state — becomes serializable
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