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https://issues.apache.org/jira/browse/SPARK-25454?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16623194#comment-16623194
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Apache Spark commented on SPARK-25454:
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User 'mgaido91' has created a pull request for this issue:
https://github.com/apache/spark/pull/22450
> Division between operands with negative scale can cause precision loss
> ----------------------------------------------------------------------
>
> Key: SPARK-25454
> URL: https://issues.apache.org/jira/browse/SPARK-25454
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.3.0, 2.3.1
> Reporter: Marco Gaido
> Priority: Major
>
> The issue was originally reported by [~bersprockets] here:
> https://issues.apache.org/jira/browse/SPARK-22036?focusedCommentId=16618104&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16618104.
> The problem consist in a precision loss when the second operand of the
> division is a decimal with a negative scale. It was present also before 2.3
> but it was harder to reproduce: you had to do something like
> {{lit(BigDecimal(100e6))}}, while now this can happen more frequently with
> SQL constants.
> The problem is that our logic is taken from Hive and SQLServer where decimals
> with negative scales are not allowed. We might also consider enforcing this
> too in 3.0 eventually. Meanwhile we can fix the logic for computing the
> result type for a division.
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