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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2019/06/29 10:19:00 UTC
[jira] [Assigned] (SPARK-28201) Revisit MakeDecimal behavior on
overflow
[ https://issues.apache.org/jira/browse/SPARK-28201?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-28201:
------------------------------------
Assignee: Apache Spark
> Revisit MakeDecimal behavior on overflow
> ----------------------------------------
>
> Key: SPARK-28201
> URL: https://issues.apache.org/jira/browse/SPARK-28201
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Marco Gaido
> Assignee: Apache Spark
> Priority: Major
>
> As pointed out in https://github.com/apache/spark/pull/20350#issuecomment-505997469, in special cases of decimal aggregation we are using the `MakeDecimal` operator.
> This operator has a not well defined behavior in case of overflow, namely what it does currently is:
> - if codegen is enabled it returns null;
> - in interpreted mode it throws an `IllegalArgumentException`.
> So we should make his behavior uniform with other similar cases and in particular we should honor the value of the conf introduced in SPARK-23179 and behave accordingly, ie.:
> - returning null if the flag is true;
> - throw an `ArithmeticException` if the flag is false.
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