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Python: Restore Inferring Iceberg UUIDType from parquet files #8215

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Merged
Fokko merged 1 commit into from
Aug 3, 2023
Merged

Python: Restore Inferring Iceberg UUIDType from parquet files #8215

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9 changes: 9 additions & 0 deletions python/pyiceberg/schema.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1367,3 +1367,12 @@ def _(file_type: DecimalType, read_type: IcebergType) -> IcebergType:
raise ResolveError(f"Cannot reduce precision from {file_type} to {read_type}")
else:
raise ResolveError(f"Cannot promote an decimal to {read_type}")


@promote.register(FixedType)
def _(file_type: FixedType, read_type: IcebergType) -> IcebergType:
if isinstance(read_type, UUIDType) and len(file_type) == 16:
# Since pyarrow reads parquet UUID as fixed 16-byte binary, the promotion is needed to ensure read compatibility
return read_type
else:
raise ResolveError(f"Cannot promote {file_type} to {read_type}")