== Physical Plan ==
* ColumnarToRow (4)
+- Union (3)
   :- Scan parquet spark_catalog.default.customers (1)
   +- Scan parquet spark_catalog.default.customers (2)


(1) Scan parquet spark_catalog.default.customers
Output [1]: [city#49]
Batched: true
Location: InMemoryFileIndex [file:/tmp/warehouse2/customers]
ReadSchema: struct<city:string>

(2) Scan parquet spark_catalog.default.customers
Output [1]: [name#81]
Batched: true
Location: InMemoryFileIndex [file:/tmp/warehouse2/customers]
ReadSchema: struct<name:string>

(3) Union

(4) ColumnarToRow [codegen id : 1]
Input [1]: [city#49]
