chris-twiner commented on code in PR #34558:
URL: https://github.com/apache/spark/pull/34558#discussion_r1994100057


##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/higherOrderFunctions.scala:
##########
@@ -235,6 +256,53 @@ trait HigherOrderFunction extends Expression with 
ExpectsInputTypes {
     val canonicalizedChildren = cleaned.children.map(_.canonicalized)
     withNewChildren(canonicalizedChildren)
   }
+
+
+  protected def assignAtomic(atomicRef: String, value: String, isNull: String 
= FalseLiteral,
+      nullable: Boolean = false) = {
+    if (nullable) {
+      s"""
+        if ($isNull) {
+          $atomicRef.set(null);
+        } else {
+          $atomicRef.set($value);
+        }
+      """
+    } else {
+      s"$atomicRef.set($value);"
+    }
+  }
+
+  protected def assignArrayElement(ctx: CodegenContext, arrayName: String, 
elementCode: ExprCode,
+      elementVar: NamedLambdaVariable, index: String): String = {
+    val elementType = elementVar.dataType
+    val elementAtomic = ctx.addReferenceObj(elementVar.name, elementVar.value)
+    val extractElement = CodeGenerator.getValue(arrayName, elementType, index)

Review Comment:
   Yes, that's definitely all it is, I may spend time to find a reproducible 
case of this but it's not in the hof test suite.
   
   It makes sense to keep the two things separate. 



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