alamb commented on pull request #512:
URL: https://github.com/apache/arrow-rs/pull/512#issuecomment-942510634
The spec doesn't seem to mention allowing "approximate" estimations of
distinct value counts:
https://github.com/apache/parquet-format/blob/43c891a4494f85e2fe0e56f4ef408bcc60e8da48/src/main/thrift/parquet.thrift#L216-L217
As @crepererum says, it does offer a specific BloomFilter implementation:
https://github.com/apache/parquet-format/blob/43c891a4494f85e2fe0e56f4ef408bcc60e8da48/src/main/thrift/parquet.thrift#L216-L217
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