stop using java.util.Stack
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Key: HIVE-1626
URL: https://issues.apache.org/jira/browse/HIVE-1626
Project: Hadoop Hive
Issue Type: Improvement
Components: Query Processor
Affects Versions: 0.7.0
Reporter: John Sichi
Assignee: John Sichi
Fix For: 0.7.0
We currently use Stack as part of the generic node walking library. Stack
should not be used for this since its inheritance from Vector incurs
superfluous synchronization overhead.
Most projects end up adding an ArrayStack implementation and using that instead.
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