crepererum commented on pull request #512: URL: https://github.com/apache/arrow-rs/pull/512#issuecomment-942459815
IIRC parquet itself doesn't specify a HLL but only a bloom filter (which in theory can also do a cardinality estimation but shouldn't really be used for that). We could of course embed a HLL in a custom key-value metadata field. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: github-unsubscr...@arrow.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
