row.getList java.lang.ClassCastException：java.math.BigDecimal 不能转换为 scala.collection.Seq

Question

I'm trying to retrieve a list from a row with the following schema element.

[info]  |-- ARRAY_FIELD: array (nullable = false)
[info]  |    |-- element: string (containsNull = false)

When printing using

row.getAs[WrappedArray[String]]("ARRAY_FIELD")

I get the following result

WrappedArray(Some String value)

But when I attempt to print the data at that index as a list using....

row.getList(0)

I get the following exception

java.lang.ClassCastException: java.math.BigDecimal cannot be cast to scala.collection.Seq

Does anyone have any ideas on why this happens and how it can be resolved?

Answer 1

I was actually pulling from the wrong index in the schema. I assumed that the index for getList was based on the index of the elements shown when using df.printSchema. But I was wrong. Off by 6 postions.