Sihua Zhou created FLINK-9474:
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Summary: Introduce an approximate version of "count distinct"
Key: FLINK-9474
URL: https://issues.apache.org/jira/browse/FLINK-9474
Project: Flink
Issue Type: New Feature
Components: Table API & SQL
Affects Versions: 1.5.0
Reporter: Sihua Zhou
Assignee: Sihua Zhou
We can implement an approximate version of "count distinct" base on the
"Elastic Bloom Filter", It could be very fast because we don't need to query
the state anymore, its accuracy should could be configurable. e.g 95%, 98%.
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