[jira] [Created] (SPARK-22939) registerFunction also accepts Spark UDF

["Xiao Li (JIRA)" <ji...@apache.org>]

Xiao Li created SPARK-22939:
-------------------------------

             Summary: registerFunction also accepts Spark UDF 
                 Key: SPARK-22939
                 URL: https://issues.apache.org/jira/browse/SPARK-22939
             Project: Spark
          Issue Type: Bug
          Components: PySpark, SQL
    Affects Versions: 2.3.0
            Reporter: Xiao Li


{noformat}
import random
from pyspark.sql.functions import udf
from pyspark.sql.types import IntegerType, StringType
random_udf = udf(lambda: int(random.random() * 100), IntegerType()).asNondeterministic()
spark.catalog.registerFunction("random_udf", random_udf, StringType())
spark.sql("SELECT random_udf()").collect()
{noformat}

We will get the following error.
{noformat}
Py4JError: An error occurred while calling o29.__getnewargs__. Trace:
py4j.Py4JException: Method __getnewargs__([]) does not exist
	at py4j.reflection.ReflectionEngine.getMethod(ReflectionEngine.java:318)
	at py4j.reflection.ReflectionEngine.getMethod(ReflectionEngine.java:326)
	at py4j.Gateway.invoke(Gateway.java:274)
	at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)
	at py4j.commands.CallCommand.execute(CallCommand.java:79)
	at py4j.GatewayConnection.run(GatewayConnection.java:214)
	at java.lang.Thread.run(Thread.java:745)
{noformat}



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