Attila Magyar created HIVE-22094:
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             Summary: Mondrian queries failing with ClassCastException: 
hive.ql.exec.vector.DecimalColumnVector cannot be cast to 
hive.ql.exec.vector.Decimal64ColumnVector
                 Key: HIVE-22094
                 URL: https://issues.apache.org/jira/browse/HIVE-22094
             Project: Hive
          Issue Type: Task
          Components: Hive
            Reporter: Attila Magyar
            Assignee: Attila Magyar
             Fix For: 4.0.0


When running a query like this

select sum(salary.salary_paid) from salary, employee_closure where 
salary.employee_id = employee_closure.employee_id;

with hive.auto.convert.join=true and hive.vectorized.execution.enabled=true the 
following exception occurs
{code:java}
Caused by: java.lang.ClassCastException: 
org.apache.hadoop.hive.ql.exec.vector.DecimalColumnVector cannot be cast to 
org.apache.hadoop.hive.ql.exec.vector.Decimal64ColumnVector

at 
org.apache.hadoop.hive.ql.exec.vector.expressions.aggregates.VectorUDAFSumDecimal64ToDecimal.aggregateInput(VectorUDAFSumDecimal64ToDecimal.java:320)

at 
org.apache.hadoop.hive.ql.exec.vector.VectorGroupByOperator$ProcessingModeBase.processAggregators(VectorGroupByOperator.java:217)

at 
org.apache.hadoop.hive.ql.exec.vector.VectorGroupByOperator$ProcessingModeHashAggregate.doProcessBatch(VectorGroupByOperator.java:414)

at 
org.apache.hadoop.hive.ql.exec.vector.VectorGroupByOperator$ProcessingModeBase.processBatch(VectorGroupByOperator.java:182)

at 
org.apache.hadoop.hive.ql.exec.vector.VectorGroupByOperator.process(VectorGroupByOperator.java:1124)

at org.apache.hadoop.hive.ql.exec.Operator.vectorForward(Operator.java:919)

at 
org.apache.hadoop.hive.ql.exec.vector.mapjoin.VectorMapJoinGenerateResultOperator.forwardOverflow(VectorMapJoinGenerateResultOperator.java:706)

at 
org.apache.hadoop.hive.ql.exec.vector.mapjoin.VectorMapJoinInnerBigOnlyGenerateResultOperator.generateHashMultiSetResultMultiValue(VectorMapJoinInnerBigOnlyGenerateResultOperator.java:268)

at 
org.apache.hadoop.hive.ql.exec.vector.mapjoin.VectorMapJoinInnerBigOnlyGenerateResultOperator.finishInnerBigOnly(VectorMapJoinInnerBigOnlyGenerateResultOperator.java:180)

at 
org.apache.hadoop.hive.ql.exec.vector.mapjoin.VectorMapJoinInnerBigOnlyLongOperator.processBatch(VectorMapJoinInnerBigOnlyLongOperator.java:379)

... 28 more{code}



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