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https://issues.apache.org/jira/browse/SPARK-28671?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16903570#comment-16903570
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pavithra ramachandran commented on SPARK-28671:
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i will work on this
> [UDF] dropping permanent function when a temporary function with the same
> name already exists giving wrong msg on dropping it again
> -----------------------------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-28671
> URL: https://issues.apache.org/jira/browse/SPARK-28671
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.4.0
> Reporter: ABHISHEK KUMAR GUPTA
> Priority: Minor
>
> Created jar and uploaded at hdfs path
> 1. ./hdfs dfs -put /opt/trash1/AddDoublesUDF.jar /user/user1/
> 2. Launch beeline and created permanent function
> CREATE FUNCTION addDoubles AS
> 'com.huawei.bigdata.hive.example.udf.AddDoublesUDF' using jar
> 'hdfs://hacluster/user/user1/AddDoublesUDF.jar';
> 3. Perform select operation
> jdbc:hive2://100.100.208.125:23040/default> SELECT addDoubles(1,2,3);
> +------------------------------+--+
> | default.addDoubles(1, 2, 3) |
> +------------------------------+--+
> | 6.0 |
> +------------------------------+--+
> 1 row selected (0.111 seconds)
> 4. Created temporary function as below
> jdbc:hive2://100.100.208.125:23040/default> CREATE temporary FUNCTION
> addDoubles AS 'com.huawei.bigdata.hive.example.udf.AddDoublesUDF' using jar
> 'hdfs://hacluster/user/user1/AddDoublesUDF.jar';
> 5. jdbc:hive2://100.100.208.125:23040/default> SELECT addDoubles(1,2,3);
> +----------------------+--+
> | addDoubles(1, 2, 3) |
> +----------------------+--+
> | 6.0 |
> +----------------------+--+
> 1 row selected (0.088 seconds)
> 6. Drop function
> jdbc:hive2://100.100.208.125:23040/default> drop function addDoubles;
> +---------+--+
> | Result |
> +---------+--+
> +---------+--+
> 7. jdbc:hive2://100.100.208.125:23040/default> SELECT addDoubles(1,2,3);
> -- It is success
> 8. Drop again Error thrown
> jdbc:hive2://100.100.208.125:23040/default> drop function addDoubles;
> Error: org.apache.spark.sql.catalyst.analysis.NoSuchFunctionException:
> Undefined function: 'default.addDoubles'. This function is neither a
> registered temporary function nor a permanent function registered in the
> database 'default'.; (state=,code=0)
> 9. Perform again select
> jdbc:hive2://100.100.208.125:23040/default> SELECT addDoubles(1,2,3);
> +----------------------+--+
> | addDoubles(1, 2, 3) |
> +----------------------+--+
> | 6.0 |
>
> Issue is why the Error msg shown is step 8 saying it is neither registered as
> permanent or temporary function where as it is registered as temporary
> function in step 4 that is why in step 9 select is returning result.
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