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Apache Spark commented on SPARK-21350: -------------------------------------- User 'gatorsmile' has created a pull request for this issue: https://github.com/apache/spark/pull/18574 > Fix the error message when the number of arguments is wrong when invoking a > UDF > ------------------------------------------------------------------------------- > > Key: SPARK-21350 > URL: https://issues.apache.org/jira/browse/SPARK-21350 > Project: Spark > Issue Type: Bug > Components: SQL > Affects Versions: 2.0.2, 2.1.1, 2.2.0 > Reporter: Xiao Li > Assignee: Xiao Li > > Got a confusing error message when the number of arguments is wrong when > invoking a UDF. > {noformat} > val df = spark.emptyDataFrame > spark.udf.register("foo", (_: String).length) > df.selectExpr("foo(2, 3, 4)") > {noformat} > {noformat} > org.apache.spark.sql.UDFSuite$$anonfun$9$$anonfun$apply$mcV$sp$12 cannot be > cast to scala.Function3 > java.lang.ClassCastException: > org.apache.spark.sql.UDFSuite$$anonfun$9$$anonfun$apply$mcV$sp$12 cannot be > cast to scala.Function3 > at > org.apache.spark.sql.catalyst.expressions.ScalaUDF.<init>(ScalaUDF.scala:109) > {noformat} -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org