Metric multiplication not working in Kylin 2.6.1

[Jayakumar Balasubramanya]

Hi,
                I am trying to compute weighted average but facing issue when 
trying to multiple two metrics itself. When  I try to multiply 2 metrics it 
gives following error. Weighted average is   sum(metric 1 * metric2) / sum ( 
metric2)  whether metric2 is the weight.


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Thanks,
JK