The accumulator of ArrayAggregate should copy the intermediate result if string, struct, array, or map

import org.apache.spark.sql.functions._

val reverse = udf((s: String) => s.reverse)

val df = Seq(Array("abc", "def")).toDF("array")
val testArray = df.withColumn(
  "agg",
  aggregate(
    col("array"),
    array().cast("array<string>"),
    (acc, s) => concat(acc, array(reverse(s)))))

aggArray.show(truncate=false)

+----------+----------+
|array     |agg       |
+----------+----------+
|[abc, def]|[cba, fed]|
+----------+----------+

+----------+----------+
|array     |agg       |
+----------+----------+
|[abc, def]|[fed, fed]|
+----------+----------+