[jira] [Created] (PARQUET-1815) Add union API to BloomFilter interface

[Junjie Chen (Jira)]

Junjie Chen created PARQUET-1815:
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             Summary: 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


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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