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https://issues.apache.org/jira/browse/SPARK-9425?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14646827#comment-14646827
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Apache Spark commented on SPARK-9425:
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User 'davies' has created a pull request for this issue:
https://github.com/apache/spark/pull/7758
> Support DecimalType in UnsafeRow
> --------------------------------
>
> Key: SPARK-9425
> URL: https://issues.apache.org/jira/browse/SPARK-9425
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Davies Liu
> Assignee: Davies Liu
> Priority: Blocker
>
> The DecimalType has a precision up to 38 digits, so it's possible to
> serialize a Decimal as bounded byte array.
> We could have a fast path for DecimalType with precision under 18 digits,
> which could fit in a single long.
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