[jira] [Created] (BEAM-8126) HllCount needs to handle null sketches properly

[Yueyang Qiu (Jira)]

Yueyang Qiu created BEAM-8126:
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             Summary: HllCount needs to handle null sketches properly
                 Key: BEAM-8126
                 URL: https://issues.apache.org/jira/browse/BEAM-8126
             Project: Beam
          Issue Type: Improvement
          Components: sdk-java-core
            Reporter: Yueyang Qiu
            Assignee: Yueyang Qiu


BigQuery uses `null` to represent result of aggregations of empty input. We 
need to make sure `null` sketches are handled properly in Beam and users have a 
smooth end-to-end experience using BigQuery's `HLL_COUNT` in conjunction with 
Beam's `HllCount`.



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