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https://issues.apache.org/jira/browse/SPARK-8342?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14584943#comment-14584943
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Reynold Xin commented on SPARK-8342:
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[~rtreffer] if this patch doesn't fix it, can you open another ticket? Thanks.
https://github.com/apache/spark/pull/6797
> Decimal Math beyond ~2^112 is broken
> ------------------------------------
>
> Key: SPARK-8342
> URL: https://issues.apache.org/jira/browse/SPARK-8342
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.5.0
> Reporter: Rene Treffer
> Fix For: 1.5.0
>
>
> Here is a snippet from the spark-shell that should not happen
> {code}
> scala> val d = Decimal(Long.MaxValue,100,0) * Decimal(Long.MaxValue,100,0)
> d: org.apache.spark.sql.types.Decimal = 0
> scala> d.toDebugString
> res3: String = Decimal(expanded,0,1,0})
> {code}
> It looks like precision gets reseted on some operations and values are then
> truncated.
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