song fengfei created SPARK-20095:
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Summary: A code bug in CodegenContext.withSubExprEliminationExprs
Key: SPARK-20095
URL: https://issues.apache.org/jira/browse/SPARK-20095
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 2.1.0
Reporter: song fengfei
Priority: Minor
In the function:CodegenContext.withSubExprEliminationExprs...{
val oldsubExprEliminationExprs = subExprEliminationExprs
subExprEliminationExprs.clear
...
// Restore previous subExprEliminationExprs
subExprEliminationExprs.clear
oldsubExprEliminationExprs.foreach(subExprEliminationExprs += _)
}
it seems that the oldsubExprEliminationExprs and subExprEliminationExprs are
the same instance,after the second subExprEliminationExprs.clear ,the
oldsubExprEliminationExprs is also cleared,so,the previous
subExprEliminationExprs in CodegenContext will not be Restored.
Is it a bug?
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