Kuinox opened a new pull request, #48255:
URL: https://github.com/apache/arrow/pull/48255
### Rationale for this change
pq.read_schema drops extension types (UUID comes back as
fixed_size_binary[16]), while ParquetFile.schema_arrow and read_table preserve
them. Schema inspection via metadata should match table/extension behavior.
### What changes are included in this PR?
- Plumb arrow_extensions_enabled into read_schema and return schema_arrow
when enabled so extension types are preserved.
- Add regression test ensuring UUID extension types are retained by
read_schema and downgraded to binary(16) when extensions are disabled.
### Are these changes tested?
- Yes: added unit test test_read_schema_uuid_extension_type
### Are there any user-facing changes?
- Behavior improvement: read_schema now preserves extension types (e.g.,
UUID) when extensions are enabled; no API break
Notes:
- I don't know if the fact the column types being returned are now
extension<arrow.uuid> instead of fixed_size_binary[16], is considered a
breaking change.
- This PR patch was AI generated, but I personally reviewed it, the scope is
small, and it looks fine to me.
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