Hari Sankar Sivarama Subramaniyan created HIVE-6708:
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Summary: ConstantVectorExpression should create copies of data
objects rather than referencing them
Key: HIVE-6708
URL: https://issues.apache.org/jira/browse/HIVE-6708
Project: Hive
Issue Type: Bug
Reporter: Hari Sankar Sivarama Subramaniyan
Assignee: Hari Sankar Sivarama Subramaniyan
1. ConstantVectorExpression vector should be updated for bytecolumnvectors and
decimalColumnVectors. The current code changes the reference to the vector
which might be shared across multiple columns
2. VectorizationContext.foldConstantsForUnaryExpression(ExprNodeDesc exprDesc)
has a minor bug as to when to constant fold the expression.
The following code should replace the corresponding piece of code in the trunk.
..
GenericUDF gudf = ((ExprNodeGenericFuncDesc) exprDesc).getGenericUDF();
if (gudf instanceof GenericUDFOPNegative || gudf instanceof
GenericUDFOPPositive
|| castExpressionUdfs.contains(gudf.getClass())
...
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