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https://issues.apache.org/jira/browse/DRILL-3323?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jason Altekruse updated DRILL-3323:
-----------------------------------
Fix Version/s: (was: 1.2.0)
1.3.0
> Flatten planning rule creates unneeded copy of the list being flattened,
> causes executuion/allocation issues with large lists
> -----------------------------------------------------------------------------------------------------------------------------
>
> Key: DRILL-3323
> URL: https://issues.apache.org/jira/browse/DRILL-3323
> Project: Apache Drill
> Issue Type: Bug
> Components: Execution - Flow
> Reporter: Jason Altekruse
> Assignee: Jason Altekruse
> Fix For: 1.3.0
>
>
> The planning rule for flatten was written to not only handle the flatten
> operator, but it also was designed to address some shortcomings in expression
> evaluation involving complex types. The rule currently plans inefficiently to
> try to cover some of these more advanced cases, but there is not thorough
> test coverage to even demonstrate the benefits of it. We should disable a
> particular behavior of copying complex data and extra time when it is not
> needed, because it is causing flatten queries to fail with allocation issues.
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