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https://issues.apache.org/jira/browse/SPARK-3933?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Armbrust resolved SPARK-3933.
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Resolution: Fixed
> Optimize decimal type in Spark SQL for those with small precision
> -----------------------------------------------------------------
>
> Key: SPARK-3933
> URL: https://issues.apache.org/jira/browse/SPARK-3933
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Reporter: Matei Zaharia
> Assignee: Matei Zaharia
>
> With fixed-precision decimals, many decimal values will fit in a Long, so we
> can use a Decimal class with a mutable Long field to represent the unscaled
> value, rather than allocating a BigDecimal. We can then do some operations
> directly on these Long fields.
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