Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/15513#discussion_r84590609
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/CallMethodViaReflection.scala
---
@@ -43,11 +43,20 @@ import org.apache.spark.util.Utils
* and the second element should be a literal string for
the method name,
* and the remaining are input arguments to the Java
method.
*/
-// scalastyle:off line.size.limit
@ExpressionDescription(
- usage = "_FUNC_(class,method[,arg1[,arg2..]]) calls method with
reflection",
- extended = "> SELECT _FUNC_('java.util.UUID', 'randomUUID');\n
c33fb387-8500-4bfa-81d2-6e0e3e930df2")
-// scalastyle:on line.size.limit
+ usage = "_FUNC_(class, method[, arg1[, arg2 ..]]) - Calls method with
reflection.",
+ extended = """
+ Arguments:
+ class - a string literal that represents a fully-qualified class
name.
+ method - a string literal that represents a method name.
+ arg - a string literal that represents arguments for the method.
--- End diff --
Oh, it seems `arg` is not. Let me try to fine such cases here.
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