[VL] Fix function input_file_name() outputs empty string in certain query plan patterns
#255
| Job | Run time |
|---|---|
| 1m 4s | |
| 7m 3s | |
| 1h 9m 51s | |
| 28m 24s | |
| 27m 39s | |
| 1h 4m 16s | |
| 26m 10s | |
| 25m 22s | |
| 25m 58s | |
| 16m 49s | |
| 25m 59s | |
| 15m 57s | |
| 26m 33s | |
| 26m 26s | |
| 16m 10s | |
| 22m 48s | |
| 6h 0m 13s | |
| 16m 1s | |
| 27m 48s | |
| 21m 3s | |
| 16m 44s | |
| 26m 2s | |
| 15m 34s | |
| 1h 15m 38s | |
| 24m 49s | |
| 31m 10s | |
| 25m 14s | |
| 16m 32s | |
| 25m 17s | |
| 16m 2s | |
| 1h 3m 44s | |
| 15m 41s | |
| 33m 27s | |
| 1h 7m 45s | |
| 16m 16s | |
| 1h 7m 45s | |
| 35m 34s | |
| 23h 44m 48s |