GH-36889: [C++][Python] Fix duplicate CSV header when first batch is empty #56014
| Job | Run time |
|---|---|
| 9m 40s | |
| 22m 55s | |
| 20m 48s | |
| 46m 54s | |
| 1h 0m 19s | |
| 19m 58s | |
| 35m 34s | |
| 19m 8s | |
| 1h 0m 2s | |
| 46m 54s | |
| 35m 34s | |
| 20m 48s | |
| 22m 55s | |
| 19m 8s | |
| 19m 58s | |
| 9m 40s | |
| 7h 50m 15s |
| Job | Run time |
|---|---|
| 9m 40s | |
| 22m 55s | |
| 20m 48s | |
| 46m 54s | |
| 1h 0m 19s | |
| 19m 58s | |
| 35m 34s | |
| 19m 8s | |
| 1h 0m 2s | |
| 46m 54s | |
| 35m 34s | |
| 20m 48s | |
| 22m 55s | |
| 19m 8s | |
| 19m 58s | |
| 9m 40s | |
| 7h 50m 15s |