Yikun opened a new pull request, #36357:
URL: https://github.com/apache/spark/pull/36357
### What changes were proposed in this pull request?
This patch refresh categories.dtype when astype('category')
### Why are the changes needed?
categories.dtype is not refreshed before, follow pandas latest version
behavior
### Does this PR introduce _any_ user-facing change?
Yep, and follow pandas behavior
### How was this patch tested?
- BooleanExtensionOpsTest.test_astype
- StringExtensionOpsTest.test_astype
- FractionalExtensionOpsTest.test_astype (new added)
passed with pandas 1.4
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