is there an opportunity to export a table with column names in first line of
the exported file?
I don't believe that is currently possible, no.
It seems like a nice enhancement to suggest.
I see some enhancement requests for SYSCS_EXPORT_TABLE logged as:
https://issues.apache.org/jira/browse/DERBY-6850
but yours seems rather a different idea than those.
If you'd like to record your enhancement request, it seems to me
you could either add it to DERBY-6850 or you could log a new suggestion.
See: http://db.apache.org/derby/DerbyBugGuidelines.html for
more details about how Derby tracks suggestions and bug reports.
thanks,
bryan