wyzhao commented on a change in pull request #8672:
URL: https://github.com/apache/arrow/pull/8672#discussion_r527096473
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File path: python/pyarrow/parquet.py
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@@ -1237,6 +1264,8 @@ def validate_schemas(self):
if self.common_metadata is not None:
self.schema = self.common_metadata.schema
else:
+ if not self.pieces:
+ raise ValueError('No partition is found.')
Review comment:
If no partition satisfies the filters, the next line will throw
IndexOutOfRange error:
self.schema = self.pieces[0].get_metadata().schema
I add the two lines to make the error more meaningful.
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