Wei Zheng created HIVE-11193:
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Summary: ConstantPropagateProcCtx should use a Set instead of a
List to hold operators to be deleted
Key: HIVE-11193
URL: https://issues.apache.org/jira/browse/HIVE-11193
Project: Hive
Issue Type: Bug
Components: Logical Optimizer
Reporter: Wei Zheng
Assignee: Wei Zheng
During Constant Propagation optimization, sometimes a node ends up being added
to opToDelete list more than once.
Later in ConstantPropagate transform, we try to delete that operator multiple
times, which will cause SemanticException since the node has already been
removed in an earlier pass.
The data structure for storing opToDelete is List. We should use Set to avoid
the problem.
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