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https://issues.apache.org/jira/browse/IMPALA-10185?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tim Armstrong updated IMPALA-10185:
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Component/s: Frontend
> Leverage boolean statistics for computing selectivity
> -----------------------------------------------------
>
> Key: IMPALA-10185
> URL: https://issues.apache.org/jira/browse/IMPALA-10185
> Project: IMPALA
> Issue Type: Improvement
> Components: Frontend
> Affects Versions: Impala 3.4.0
> Reporter: Shant Hovsepian
> Assignee: Shant Hovsepian
> Priority: Minor
>
> As part of computing stats for a boolean column we record the value counts.
> numTrues, numFalses, numNulls.
> However when calculating cardinality for boolean column predicates the
> selectivity of 1/3 is always used instead of factoring the value distribution
> recorded in the stats.
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