cloud-fan commented on issue #22450: [SPARK-25454][SQL] Avoid precision loss in division with decimal with negative scale URL: https://github.com/apache/spark/pull/22450#issuecomment-448248886 It's Spark 3.0 now, shall we consider forbidding negative scale? This is an undocumented and broken feature, and many databases don't support it either. I checked that parquet doesn't support negative scale, which means Spark can't support it well as Spark can't write it to data source like parquet. cc @dilipbiswal
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