amaliujia opened a new pull request, #40499:
URL: https://github.com/apache/spark/pull/40499
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### What changes were proposed in this pull request?
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`physicalDataType` should not be a public API but be private[sql].
### Why are the changes needed?
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This is to limit API scope to not expose unnecessary API to be public.
### Does this PR introduce _any_ user-facing change?
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No since we have not released Spark 3.4.0 yet.
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N/A
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