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https://issues.apache.org/jira/browse/PARQUET-2345?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17770902#comment-17770902
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Micah Kornfield commented on PARQUET-2345:
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I've at least seen in the wild two columns containing the same name only
diverging by case sensitivity. I agree we should recommend against them since
its not clear they will be able to handled well. If we do update docs, we
should also recommend against naming columns using "." as a delimeter as this
can also lead to ambiguity.
> The Parquet Spec doesn't specify whether multiple columns are allowed to have
> the same name.
> --------------------------------------------------------------------------------------------
>
> Key: PARQUET-2345
> URL: https://issues.apache.org/jira/browse/PARQUET-2345
> Project: Parquet
> Issue Type: Improvement
> Components: parquet-format
> Affects Versions: 1.13.1
> Reporter: Jan Finis
> Priority: Minor
>
> The parquet format specification doesn't say whether a Parquet file having
> columns with the same name (in the same group node, so really exactly the
> same name) is valid. I.e., say I have a Parquet file with two columns. Both
> are called x. Is this file a valid Parquet file?
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