Github user mn-mikke commented on the issue:
https://github.com/apache/spark/pull/21045
@DylanGuedes What about `CodeGenerator.getValue(s"arrVals[$j]",
jThChildDataType, i)`?
I recommend you to use some debbuger to check and understand what gets
generated out of your code or if you don't use any IDE, try to run the
following in spark-shell:
```
import org.apache.spark.sql.execution.debug._
val df = ... create your testing df ...
df.debugCodegen
```
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