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https://issues.apache.org/jira/browse/PARQUET-686?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15854711#comment-15854711
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Ryan Blue commented on PARQUET-686:
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[~julianhyde], I'm not sure that we should make this SQL-specific. Right now,
the PR allows a String identifier for custom sort orders, so these could be
expressed as "sql:latin1" or "sql:CI". Does that work?
Also, I'd like to find a spec for these, even if it is just a page documenting
what postgres or some other implementation does.
> Allow for Unsigned Statistics in Binary Type
> --------------------------------------------
>
> Key: PARQUET-686
> URL: https://issues.apache.org/jira/browse/PARQUET-686
> Project: Parquet
> Issue Type: Bug
> Reporter: Andrew Duffy
>
> BinaryStatistics currently only have a min/max, which are compared as signed
> {{byte[]}}. However, for real UTF8-friendly lexicographic comparison, e.g.
> for string columns, we would want to calculate the BinaryStatistics based off
> of a comparator that treats the bytes as unsigned.
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