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Posted to issues-all@impala.apache.org by "Quanlong Huang (Jira)" <ji...@apache.org> on 2026/06/02 02:34:00 UTC

[jira] [Created] (IMPALA-15063) Track scan cardinality with Runtime Filters

Quanlong Huang created IMPALA-15063:
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             Summary: Track scan cardinality with Runtime Filters
                 Key: IMPALA-15063
                 URL: https://issues.apache.org/jira/browse/IMPALA-15063
             Project: IMPALA
          Issue Type: Improvement
          Components: Backend, Frontend
            Reporter: Quanlong Huang
            Assignee: Quanlong Huang


In the initial work of HBO, scan cardinalities are ignored if some rows are filtered out by runtime filters (RFs) since the cardinalities is non-deterministic depending on whether the runtime filters arrive in time.

We can consider adding the RFs into the HBO key string so such scan cardinalities can be reused in estimation when applying the same set of RFs.



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