conn = sQLshellAPI.getCurrentlyVisibleShell().getConnection();

specs = sQLshellAPI.getCurrentlyVisibleShell().getDBMSInterface().getDatabaseSpecifics().orElse(null);

if (specs != null)
{
    myFunc = new de.elbosso.db.spi.impl.sqlite.Function()
    {
        fun=null;

        public void setBridge(Object bridge)
        {
            fun = bridge;
        }

        protected void xFunc()
        {
            try
            {
                if (fun.iargs() == 2)
                {
                    try
                    {
                        java.lang.String pattern = fun.ivalue_text(0);
                        java.lang.String input = fun.ivalue_text(1);
                        fun.iresult(java.util.regex.Pattern.matches(pattern, input) ? 1 : 0);
                    } catch (java.lang.Throwable t)
                    {
                        t.printStackTrace();
                        fun.ierror(t.getMessage());
                    }
                }
                else
                {
                    fun.ierror("expected two text arguments!");
                }
            } catch (java.lang.Throwable t)
            {
                fun.ierror(t.getMessage());
            }
        }
    };
    func = new de.elbosso.db.spi.impl.sqlite.Bridge(myFunc);

    specs.create("regexp", func);
}