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https://issues.apache.org/jira/browse/SPARK-28672?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16911007#comment-16911007
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Liang-Chi Hsieh commented on SPARK-28672:
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Is there any rule in Hive regarding this? like disallow duplicate
permanent/temporary functions, or resolving temporary/permanent function first
when duplicating?
> [UDF] Duplicate function creation should not allow
> ---------------------------------------------------
>
> Key: SPARK-28672
> URL: https://issues.apache.org/jira/browse/SPARK-28672
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.4.0
> Reporter: ABHISHEK KUMAR GUPTA
> Priority: Minor
>
> {code}
> 0: jdbc:hive2://10.18.18.214:23040/default> create function addm_3 AS
> 'com.huawei.bigdata.hive.example.udf.multiply' using jar
> 'hdfs://hacluster/user/Multiply.jar';
> +---------+--+
> | Result |
> +---------+--+
> +---------+--+
> No rows selected (0.084 seconds)
> {code}
> {code}
> 0: jdbc:hive2://10.18.18.214:23040/default> create temporary function addm_3
> AS 'com.huawei.bigdata.hive.example.udf.multiply' using jar
> 'hdfs://hacluster/user/Multiply.jar';
> INFO : converting to local hdfs://hacluster/user/Multiply.jar
> INFO : Added
> [/tmp/8a396308-41f8-4335-9de4-8268ce5c70fe_resources/Multiply.jar] to class
> path
> INFO : Added resources: [hdfs://hacluster/user/Multiply.jar]
> +---------+--+
> | Result |
> +---------+--+
> +---------+--+
> No rows selected (0.134 seconds)
> {code}
> {code}
> 0: jdbc:hive2://10.18.18.214:23040/default> show functions like addm_3;
> +-----------------+--+
> | function |
> +-----------------+--+
> | addm_3 |
> | default.addm_3 |
> +-----------------+--+
> 2 rows selected (0.047 seconds)
> {code}
> When show function executed it is listing both the function but what about
> the db for permanent function when user has not specified.
> Duplicate should not be allowed if user creating temporary one with the same
> name.
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