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https://issues.apache.org/jira/browse/IMPALA-14640?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Carlin resolved IMPALA-14640.
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Resolution: Fixed
> Calcite planner returning wrong estimates for is null predicates
> ----------------------------------------------------------------
>
> Key: IMPALA-14640
> URL: https://issues.apache.org/jira/browse/IMPALA-14640
> Project: IMPALA
> Issue Type: Sub-task
> Reporter: Steve Carlin
> Assignee: Steve Carlin
> Priority: Major
>
> The IsNullPredicate class needs to be used instead of FunctionCallExpr for
> "is null"
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