Github user marmbrus commented on the pull request: https://github.com/apache/spark/pull/3821#issuecomment-68388403 Thanks for reporting this issue. Can you add a test case? Also, I'm worried this is only masking a symptom and not fixing the underlying issue. Decimals should always be `Decimal` and never `BigDecimal` during execution. We should figure out where that contract is being broken.
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