explain select unnest([1,2]) + 1;
+--------------------------------------------------------------+
| explain                                                      |
+--------------------------------------------------------------+
| EvalScalar                                                   |
| ├── expressions: [plus(_unnest, 1)]                          |
| ├── estimated rows: 0.00                                     |
| └── Unnest                                                   |
|     └── EvalScalar                                           |
|         ├── expressions: [[1, 2]]                            |
|         ├── estimated rows: 0.00                             |
|         └── TableScan                                        |
|             ├── table: default.system.one                    |
|             ├── read rows: 1                                 |
|             ├── read bytes: 1                                |
|             ├── partitions total: 1                          |
|             ├── partitions scanned: 1                        |
|             ├── push downs: [filters: [], limit: NONE]       |
|             └── estimated rows: 0.00                         |
+--------------------------------------------------------------+

select unnest([1,2]) + 1;
+--------------------+
| unnest([1, 2]) + 1 |
+--------------------+
|                  2 |
|                  3 |
+--------------------+

select unnest([[[1,2], [3,4]], [[5,6], [7,8,9]]]);
+-------------------------------------------------+
| unnest([[[1, 2], [3, 4]], [[5, 6], [7, 8, 9]]]) |
+-------------------------------------------------+
| 1                                               |
| 2                                               |
| 3                                               |
| 4                                               |
| 5                                               |
| 6                                               |
| 7                                               |
| 8                                               |
| 9                                               |
+-------------------------------------------------+