alex commented on issue #12852:
URL: https://github.com/apache/datafusion/issues/12852#issuecomment-2469438076
From the perspective of a user, I think the ideal default behavior would be
register a clean error in that case.
But I'd also like the ability to somehow map the duplicate field names to
something (e.g., `{field}_{i}`). If it just did that by default, that'd also be
fine.
But sadly, CSVs with duplicate columns names are kind of common.
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