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https://issues.apache.org/jira/browse/PARQUET-1815?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17062724#comment-17062724
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Walid Gara commented on PARQUET-1815:
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I see it differently. Perform union and intersection depends on the
implementation of the bloom filter (in our case: BlockSplitBloomFilter). So
users don't need to understand the internal implementation, they can directly
use the API.
> Add union API to BloomFilter interface
> --------------------------------------
>
> Key: PARQUET-1815
> URL: https://issues.apache.org/jira/browse/PARQUET-1815
> Project: Parquet
> Issue Type: Improvement
> Reporter: Junjie Chen
> Priority: Minor
> Labels: pull-request-available
>
> Sometimes, one may want to build a file-level bloom filter by union all row
> groups bloom filters so that to save some memory. Add a union API that could
> make it easy to use.
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