formatter.py 文件源码

def format(self, operation, parameters=None):
        if not operation or not operation.strip():
            raise ProgrammingError('Query is none or empty.')
        operation = operation.strip()

        if operation.upper().startswith('SELECT') or operation.upper().startswith('WITH'):
            escaper = _escape_presto
        else:
            escaper = _escape_hive

        kwargs = dict()
        if parameters:
            if isinstance(parameters, dict):
                for k, v in iteritems(parameters):
                    func = self.get_formatter(v)
                    kwargs.update({k: func(self, escaper, v)})
            else:
                raise ProgrammingError('Unsupported parameter ' +
                                       '(Support for dict only): {0}'.format(parameters))

        return (operation % kwargs).strip() if kwargs else operation.strip()