exeucte() first

gistfile1.txt

{"traceback": "Traceback (most recent call last):,
  File \"/home/vagrant/treeherder-service/vendor/rest_framework/views.py\", line 396, in dispatch,
    response = handler(request, *args, **kwargs),
  File \"/home/vagrant/treeherder-service/treeherder/webapp/api/utils.py\", line 194, in use_jobs_model,
    return model_func(*args, jm=jm, **kwargs),
  File \"/home/vagrant/treeherder-service/treeherder/webapp/api/utils.py\", line 177, in wrap_oauth,
    return func(request, *args, **kwargs),
  File \"/home/vagrant/treeherder-service/treeherder/webapp/api/jobs.py\", line 127, in create,
    jm.load_job_data(request.DATA),
  File \"/home/vagrant/treeherder-service/treeherder/model/derived/jobs.py\", line 1290, in load_job_data,
    id_lookups = self.refdata_model.set_all_reference_data(),
  File \"/home/vagrant/treeherder-service/treeherder/model/derived/refdata.py\", line 118, in set_all_reference_data,
    self.id_lookup['reference_data_signatures'] = self.process_reference_data_signatures(),
  File \"/home/vagrant/treeherder-service/treeherder/model/derived/refdata.py\", line 551, in process_reference_data_signatures,
    debug_show=self.DEBUG),
  File \"/home/vagrant/treeherder-service/vendor/datasource/bases/RDBSHub.py\", line 71, in wrapper,
    return func(self, **kwargs),
  File \"/home/vagrant/treeherder-service/vendor/datasource/bases/SQLHub.py\", line 136, in execute,
    return self.__execute(sql, kwargs),
  File \"/home/vagrant/treeherder-service/vendor/datasource/bases/SQLHub.py\", line 309, in __execute,
    return self.get_data(cursor, kwargs),
  File \"/home/vagrant/treeherder-service/vendor/datasource/bases/RDBSHub.py\", line 214, in get_data,
    return_value = self.valid_return_types[return_type](cursor, kwargs),
  File \"/home/vagrant/treeherder-service/vendor/datasource/bases/SQLHub.py\", line 165, in get_tuple,
    return cursor.fetchall(),
  File \"/home/vagrant/venv/local/lib/python2.7/site-packages/MySQLdb/cursors.py\", line 382, in fetchall,
    self._check_executed(),
  File \"/home/vagrant/venv/local/lib/python2.7/site-packages/MySQLdb/cursors.py\", line 105, in _check_executed,
    self.errorhandler(self, ProgrammingError, \"execute() first\"),
  File \"/home/vagrant/venv/local/lib/python2.7/site-packages/MySQLdb/connections.py\", line 36, in defaulterrorhandler,
    raise errorclass, errorvalue,
ProgrammingError: execute() first,
", "detail": "execute() first"}