jdbc:hsqldb:file:C:\hsqldb\dbname

mysql -h hostname:port schema

urlid dev_test
  url jdbc:hsqldb:hsql://localhost/dev;set schema test;
  username programmer
  password secret

java -jar  /usr/lib/hsqldb/lib/sqltool.jar   --rcFile=~/.config/sqltool.rc  dev_tmp

url:  'jdbc:hsqldb:hsql://localhost/dev;set schema test',
 ...