| -- https://github.com/apache/incubator-doris/issues/3494 | |
| select bitmap_to_string(bitmap_from_string('0, 1, 2')) | |
| select bitmap_to_string(null) | |
| select bitmap_to_string(bitmap_empty()) | |
| select bitmap_to_string(to_bitmap(1)) | |
| select bitmap_to_string(bitmap_or(to_bitmap(1), to_bitmap(2))) |