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https://issues.apache.org/jira/browse/DRILL-340?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jason Altekruse updated DRILL-340:
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Component/s: Query Planning & Optimization
> Ensure methods intended to create new copies of plan nodes are actually
> creating copies of all nested objects
> -------------------------------------------------------------------------------------------------------------
>
> Key: DRILL-340
> URL: https://issues.apache.org/jira/browse/DRILL-340
> Project: Apache Drill
> Issue Type: Bug
> Components: Query Planning & Optimization
> Reporter: Jason Altekruse
> Fix For: Future
>
>
> Methods such as getNewWithChildren declared in the PhysicalOperator interface
> are designed to create copies of plan nodes. These copy operations should not
> reference any part of the old nodes, thus child objects should be deep
> copied, including lists of objects. For more information on the desired
> functionality see here: http://en.wikipedia.org/wiki/Clone_(Java_method)
> Existing implementations should be checked for correctness. We may want to
> create this functionality for logical operators as well, but I do not believe
> that we should need to do manipulations on logical plans that would require
> it. Our optimization of plans will happen in the logical to physical plan
> transformation.
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