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https://issues.apache.org/jira/browse/PARQUET-41?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14597901#comment-14597901
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Jason Altekruse commented on PARQUET-41:
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This might have been a little confusing, I was not proposing that Hive could
re-write the filter in place, but instead store a bloom filter with the
appropriate additions and deletions that could be combined together with the
one in the original file. With the integer array this would be as simple as a
loop to add together all of the corresponding indexes, where some may be
negative in the diff to indicate that several values that hashed to that
position had been deleted.
> Add bloom filters to parquet statistics
> ---------------------------------------
>
> Key: PARQUET-41
> URL: https://issues.apache.org/jira/browse/PARQUET-41
> Project: Parquet
> Issue Type: New Feature
> Components: parquet-format, parquet-mr
> Reporter: Alex Levenson
> Assignee: Ferdinand Xu
> Labels: filter2
>
> For row groups with no dictionary, we could still produce a bloom filter.
> This could be very useful in filtering entire row groups.
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