Github user maropu commented on the issue:
https://github.com/apache/spark/pull/21215
Do you wanna do this?
```
scala> sql("select array()").printSchema
root
|-- array(): array (nullable = false)
| |-- element: string (containsNull = false)
scala> sql("select CAST(array() AS ARRAY<INT>) c").printSchema
root
|-- c: array (nullable = false)
| |-- element: integer (containsNull = true)
scala> sql("select CAST(array() AS ARRAY<INT>) c").show
+---+
| c|
+---+
| []|
+---+
```
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