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https://issues.apache.org/jira/browse/SPARK-30309?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dongjoon Hyun resolved SPARK-30309.
-----------------------------------
Fix Version/s: 3.0.0
Resolution: Fixed
Issue resolved by pull request 26950
[https://github.com/apache/spark/pull/26950]
> Mark `Filter` as a `sealed` class
> ---------------------------------
>
> Key: SPARK-30309
> URL: https://issues.apache.org/jira/browse/SPARK-30309
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Maxim Gekk
> Assignee: Maxim Gekk
> Priority: Trivial
> Fix For: 3.0.0
>
>
> Add the `sealed` keyword to the `Filter` class at the
> `org.apache.spark.sql.sources` package. So, the compiler should output a
> warning if handling of a filter is missed in a datasource:
> {code}
> Warning:(154, 65) match may not be exhaustive.
> It would fail on the following inputs: AlwaysFalse(), AlwaysTrue()
> def translate(filter: sources.Filter): Option[Expression] = filter match {
> {code}
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