Sun, 13 Sep 2020 12:01:35 +0200combatibility with Java 9+, Tested with Java 11; JAXB library v_0
František Kučera <franta-hg@frantovo.cz> [Sun, 13 Sep 2020 12:01:35 +0200] rev 253
combatibility with Java 9+, Tested with Java 11; JAXB library

Sat, 25 Jul 2020 17:25:19 +0200improve multiple results support v_0
František Kučera <franta-hg@frantovo.cz> [Sat, 25 Jul 2020 17:25:19 +0200] rev 252
improve multiple results support

The specification talks exactly about -1:
> Returns: the current result as an update count;
> -1 if the current result is a ResultSet object or there are no more results

Other negative numbers can theoretically mean something different than „no more results“
e.g. unknown number of updates (?).