abhishekagarwal87 commented on pull request #10653:
URL: https://github.com/apache/druid/pull/10653#issuecomment-744659147
> @abhishekagarwal87 Could you check the errors in
https://travis-ci.com/github/apache/druid/jobs/456420636, including the one in
GroupByQueryRunnerTest.testGroupByWithSubtotalsSpecWithLongDimensionColumn?
It seems to be an existing bug. It can be reproduced in master by writing a
subquery that generates null values for numeric dimensions.
`RowBasedGrouperHelper#getValueSuppliersForDimensions` should handle the
scenario when input can be a numeric null.
The bug occurs only when there is a subtotal or subquery used. It was caught
here as when I removed the renaming of dimensions, I also removed the type
change that was happening earlier (the dummy dimensions were string).
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