cloud-fan commented on a change in pull request #32527:
URL: https://github.com/apache/spark/pull/32527#discussion_r631974591



##########
File path: 
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects/objects.scala
##########
@@ -127,13 +128,18 @@ trait InvokeLike extends Expression with NonSQLExpression 
{
       arguments: Seq[Expression],
       input: InternalRow,
       dataType: DataType): Any = {
-    val args = arguments.map(e => e.eval(input).asInstanceOf[Object])
-    if (needNullCheck && args.exists(_ == null)) {
+    var i = 0
+    val len = arguments.length
+    while (i < len) {
+      evaluatedArgs(i) = arguments(i).eval(input).asInstanceOf[Object]
+      i += 1
+    }
+    if (needNullCheck && evaluatedArgs.contains(null)) {
       // return null if one of arguments is null
       null
     } else {
       val ret = try {
-        method.invoke(obj, args: _*)
+        method.invoke(obj, evaluatedArgs: _*)
       } catch {

Review comment:
       makes sense, for UDF, it's just an extra `method.isDefine` check, and 
probably not a big issue.




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