How to use the webserver.web.db.SQLQuery function in webserver

def sqlquery(self): 
        return SQLQuery([self])

def _where(self, where, vars): 
        if isinstance(where, (int, long)):
            where = "id = " + sqlparam(where)
        #@@@ for backward-compatibility
        elif isinstance(where, (list, tuple)) and len(where) == 2:
            where = SQLQuery(where[0], where[1])
        elif isinstance(where, SQLQuery):
            pass
        else:
            where = reparam(where, vars)        
        return where

def query(self, q):
                db_cursor = ctx.db.cursor()
                ctx.db_execute(db_cursor, SQLQuery(q % transaction_count))

if there isn't one.
        
            >>> db = DB(None, {})
            >>> q = db.insert('foo', name='bob', age=2, created=SQLLiteral('NOW()'), _test=True)
            >>> q
            
            >>> q.query()
            'INSERT INTO foo (age, name, created) VALUES (%s, %s, NOW())'
            >>> q.values()
            [2, 'bob']
        """
        def q(x): return "(" + x + ")"
        
        if values:
            _keys = SQLQuery.join(values.keys(), ', ')
            _values = SQLQuery.join([sqlparam(v) for v in values.values()], ', ')
            sql_query = "INSERT INTO %s " % tablename + q(_keys) + ' VALUES ' + q(_values)
        else:
            sql_query = SQLQuery("INSERT INTO %s DEFAULT VALUES" % tablename)

        if _test: return sql_query
        
        db_cursor = self._db_cursor()
        if seqname is not False: 
            sql_query = self._process_insert_query(sql_query, tablename, seqname)

        if isinstance(sql_query, tuple):
            # for some databases, a separate query has to be made to find 
            # the id of the inserted row.
            q1, q2 = sql_query
            self._db_execute(db_cursor, q1)
            self._db_execute(db_cursor, q2)

>>> q = db.insert('foo', name='bob', age=2, created=SQLLiteral('NOW()'), _test=True)
            >>> q
            
            >>> q.query()
            'INSERT INTO foo (age, name, created) VALUES (%s, %s, NOW())'
            >>> q.values()
            [2, 'bob']
        """
        def q(x): return "(" + x + ")"
        
        if values:
            _keys = SQLQuery.join(values.keys(), ', ')
            _values = SQLQuery.join([sqlparam(v) for v in values.values()], ', ')
            sql_query = "INSERT INTO %s " % tablename + q(_keys) + ' VALUES ' + q(_values)
        else:
            sql_query = SQLQuery("INSERT INTO %s DEFAULT VALUES" % tablename)

        if _test: return sql_query
        
        db_cursor = self._db_cursor()
        if seqname is not False: 
            sql_query = self._process_insert_query(sql_query, tablename, seqname)

        if isinstance(sql_query, tuple):
            # for some databases, a separate query has to be made to find 
            # the id of the inserted row.
            q1, q2 = sql_query
            self._db_execute(db_cursor, q1)
            self._db_execute(db_cursor, q2)
        else:
            self._db_execute(db_cursor, sql_query)

>>> sqlors('foo = ', 1)
        
        >>> sqlors('foo = ', [1,2,3])
        
    """
    if isinstance(lst, iters):
        lst = list(lst)
        ln = len(lst)
        if ln == 0:
            return SQLQuery("1=2")
        if ln == 1:
            lst = lst[0]

    if isinstance(lst, iters):
        return SQLQuery(['('] + 
          sum([[left, sqlparam(x), ' OR '] for x in lst], []) +
          ['1=2)']
        )
    else:
        return left + sqlparam(lst)

def gen_clause(self, sql, val, vars): 
        if isinstance(val, (int, long)):
            if sql == 'WHERE':
                nout = 'id = ' + sqlquote(val)
            else:
                nout = SQLQuery(val)
        #@@@
        elif isinstance(val, (list, tuple)) and len(val) == 2:
            nout = SQLQuery(val[0], val[1]) # backwards-compatibility
        elif isinstance(val, SQLQuery):
            nout = val
        else:
            nout = reparam(val, vars)

        def xjoin(a, b):
            if a and b: return a + ' ' + b
            else: return a or b

        return xjoin(sql, nout)