[GitHub] [spark] 19kka commented on issue #25450: [SPARK-23793][SQL]Handle database names in spark.udf.register()

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19kka commented on issue #25450: [SPARK-23793][SQL]Handle database names in spark.udf.register()
URL: https://github.com/apache/spark/pull/25450#issuecomment-521537674
 
 
   > Thank you for your first contribution, @19kka . Could you run `dev/scalastyle` and fix the errors? I saw some violation like [this](https://github.com/apache/spark/pull/25450/files#diff-85fdb913077429ac8e211a3c68375994L24) here.
   
   I'm awfully sorry about forget check the style, now I fixed the style error and add UDFSuite Test.
   
   I read the related register code again, I realized `spark.sql.resigter()` is responsible for  **Create Temp Function** , so I modify the code if `spark.sql.resigter()` function name with  **database** name It will throw new AnalysisException 
   
   e.g.
   
   ```scala 
   spark.udf.register("db.fun1", (x: Long) => x + 1)
   // throw new AnalysisException
   ```

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