Export non-csv format data, parameters "delimiter" and "with_header" are meanless in cnosdb

Question

When I use copy-into syntax to load data from json file into cnosdb, I found I can provide delimiter and with_header parameters. I think these two parameters should only be used in importing csv file and meanless in other file format. Am I right?

public ❯ copy into 'test' from air file_format = (type = 'json', delimiter = '@', with_header = true);
+------+
| rows |
+------+
| 6    |
+------+
Query took 0.007 seconds.