Github user kiszk commented on a diff in the pull request:
https://github.com/apache/spark/pull/18574#discussion_r126365395
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
---
@@ -112,7 +112,12 @@ class SimpleFunctionRegistry extends FunctionRegistry {
throw new AnalysisException(s"undefined function $name")
}
}
- func(children)
+ try {
+ func(children)
+ } catch {
+ case _: ClassCastException =>
--- End diff --
Sorry, I made mistake. I realized the original exception happen in the
stack trace that does not execute the body.
```
Caused by: java.lang.ClassCastException:
org.apache.spark.sql.UDFSuite$$anonfun$9$$anonfun$29$$anonfun$apply$1 cannot be
cast to scala.Function3
at
org.apache.spark.sql.catalyst.expressions.ScalaUDF.<init>(ScalaUDF.scala:109)
at
org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$4(UDFRegistration.scala:160)
at
org.apache.spark.sql.UDFRegistration$$anonfun$register$4.apply(UDFRegistration.scala:161)
at
org.apache.spark.sql.UDFRegistration$$anonfun$register$4.apply(UDFRegistration.scala:161)
at
org.apache.spark.sql.catalyst.analysis.SimpleFunctionRegistry.lookupFunction(FunctionRegistry.scala:115)
...
```
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