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https://issues.apache.org/jira/browse/SPARK-19840?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15898402#comment-15898402
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Apache Spark commented on SPARK-19840:
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User 'dongjoon-hyun' has created a pull request for this issue:
https://github.com/apache/spark/pull/17182
> Disallow creating permanent functions with invalid class names
> --------------------------------------------------------------
>
> Key: SPARK-19840
> URL: https://issues.apache.org/jira/browse/SPARK-19840
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.1.0
> Reporter: Dongjoon Hyun
>
> Currently, Spark raises exceptions on creating invalid **temporary**
> functions, but doesn't for **permanent** functions. This issue aims to
> disallow creating permanent functions with invalid class names.
> **BEFORE**
> {code}
> scala> sql("CREATE TEMPORARY FUNCTION function_with_invalid_classname AS
> 'org.invalid'").show
> java.lang.ClassNotFoundException: org.invalid at
> ...
> scala> sql("CREATE FUNCTION function_with_invalid_classname AS
> 'org.invalid'").show
> ++
> ||
> ++
> ++
> {code}
> **AFTER**
> {code}
> scala> sql("CREATE FUNCTION function_with_invalid_classname AS
> 'org.invalid'").show
> java.lang.ClassNotFoundException: org.invalid
> {code}
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