Coerce Array inner types

datafusion/sqllogictest/test_files/union.slt

@@ -763,9 +763,5 @@ SELECT NULL WHERE FALSE;
 1
 
 # Test Union of List Types. Issue: https://github.com/apache/datafusion/issues/12291
-query error
-SELECT make_array(2) x UNION ALL SELECT make_array(now()) x;
-----
-DataFusion error: type_coercion
-caused by
-Error during planning: Incompatible inputs for Union: Previous inputs were of type List(Field { name: "item", data_type: Int64, nullable: true, dict_id: 0, dict_is_ordered: false, metadata: {} }), but got incompatible type List(Field { name: "item", data_type: Timestamp(Nanosecond, Some("+00:00")), nullable: true, dict_id: 0, dict_is_ordered: false, metadata: {} }) on column 'x'
+query error DataFusion error: type_coercion
+SELECT make_array(2) x UNION ALL SELECT make_array(now()) x;