Jason Altekruse created DRILL-340:
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Summary: 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
Reporter: Jason Altekruse
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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