我正在尝试使用localexecutor，而不是默认的sequentialexecutor，后者强制使用与sqllite不同的数据库。
我想试试mysql，但是我发现MySQL5.6和5.7版本有问题？不确定是否与版本兼容性有关。
希望看到任何有关气流版本和兼容的mysql版本的文档。
更新：
以下是我在使用mysql后端时单击任何与dag相关的按钮时在ui中看到的ooops错误：

Traceback (most recent call last):
  File "/home/ec2-user/.local/lib/python2.7/site-packages/flask/app.py", line 1982, in wsgi_app
    response = self.full_dispatch_request()
  File "/home/ec2-user/.local/lib/python2.7/site-packages/flask/app.py", line 1614, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/home/ec2-user/.local/lib/python2.7/site-packages/flask/app.py", line 1517, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/home/ec2-user/.local/lib/python2.7/site-packages/flask/app.py", line 1612, in full_dispatch_request
    rv = self.dispatch_request()
  File "/home/ec2-user/.local/lib/python2.7/site-packages/flask/app.py", line 1598, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/home/ec2-user/.local/lib/python2.7/site-packages/flask_admin/base.py", line 69, in inner
    return self._run_view(f, *args,**kwargs)
  File "/home/ec2-user/.local/lib/python2.7/site-packages/flask_admin/base.py", line 368, in _run_view
    return fn(self, *args,**kwargs)
  File "/home/ec2-user/.local/lib/python2.7/site-packages/flask_login.py", line 755, in decorated_view
    return func(*args,**kwargs)
  File "/home/ec2-user/.local/lib/python2.7/site-packages/airflow/www/utils.py", line 364, in view_func
    return f(*args,**kwargs)
  File "/home/ec2-user/.local/lib/python2.7/site-packages/airflow/www/utils.py", line 268, in wrapper
    session.commit()
  File "/home/ec2-user/.local/lib/python2.7/site-packages/sqlalchemy/orm/session.py", line 927, in commit
    self.transaction.commit()
  File "/home/ec2-user/.local/lib/python2.7/site-packages/sqlalchemy/orm/session.py", line 467, in commit
    self._prepare_impl()
  File "/home/ec2-user/.local/lib/python2.7/site-packages/sqlalchemy/orm/session.py", line 447, in _prepare_impl
    self.session.flush()
  File "/home/ec2-user/.local/lib/python2.7/site-packages/sqlalchemy/orm/session.py", line 2209, in flush
    self._flush(objects)
  File "/home/ec2-user/.local/lib/python2.7/site-packages/sqlalchemy/orm/session.py", line 2329, in _flush
    transaction.rollback(_capture_exception=True)
  File "/home/ec2-user/.local/lib/python2.7/site-packages/sqlalchemy/util/langhelpers.py", line 66, in __exit__
    compat.reraise(exc_type, exc_value, exc_tb)
  File "/home/ec2-user/.local/lib/python2.7/site-packages/sqlalchemy/orm/session.py", line 2293, in _flush
    flush_context.execute()
  File "/home/ec2-user/.local/lib/python2.7/site-packages/sqlalchemy/orm/unitofwork.py", line 389, in execute
    rec.execute(self)
  File "/home/ec2-user/.local/lib/python2.7/site-packages/sqlalchemy/orm/unitofwork.py", line 548, in execute
    uow
  File "/home/ec2-user/.local/lib/python2.7/site-packages/sqlalchemy/orm/persistence.py", line 181, in save_obj
    mapper, table, insert)
  File "/home/ec2-user/.local/lib/python2.7/site-packages/sqlalchemy/orm/persistence.py", line 835, in _emit_insert_statements
    execute(statement, params)
  File "/home/ec2-user/.local/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 945, in execute
    return meth(self, multiparams, params)
  File "/home/ec2-user/.local/lib/python2.7/site-packages/sqlalchemy/sql/elements.py", line 263, in _execute_on_connection
    return connection._execute_clauseelement(self, multiparams, params)
  File "/home/ec2-user/.local/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 1053, in _execute_clauseelement
    compiled_sql, distilled_params
  File "/home/ec2-user/.local/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 1189, in _execute_context
    context)
  File "/home/ec2-user/.local/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 1402, in _handle_dbapi_exception
    exc_info
  File "/home/ec2-user/.local/lib/python2.7/site-packages/sqlalchemy/util/compat.py", line 203, in raise_from_cause
    reraise(type(exception), exception, tb=exc_tb, cause=cause)
  File "/home/ec2-user/.local/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 1182, in _execute_context
    context)
  File "/home/ec2-user/.local/lib/python2.7/site-packages/sqlalchemy/engine/default.py", line 470, in do_execute
    cursor.execute(statement, parameters)
  File "/usr/local/lib64/python2.7/site-packages/pymysql/cursors.py", line 170, in execute
    result = self._query(query)
  File "/usr/local/lib64/python2.7/site-packages/pymysql/cursors.py", line 328, in _query
    conn.query(q)
  File "/usr/local/lib64/python2.7/site-packages/pymysql/connections.py", line 516, in query
    self._affected_rows = self._read_query_result(unbuffered=unbuffered)
  File "/usr/local/lib64/python2.7/site-packages/pymysql/connections.py", line 727, in _read_query_result
    result.read()
  File "/usr/local/lib64/python2.7/site-packages/pymysql/connections.py", line 1066, in read
    first_packet = self.connection._read_packet()
  File "/usr/local/lib64/python2.7/site-packages/pymysql/connections.py", line 683, in _read_packet
    packet.check_error()
  File "/usr/local/lib64/python2.7/site-packages/pymysql/protocol.py", line 220, in check_error
    err.raise_mysql_exception(self._data)
  File "/usr/local/lib64/python2.7/site-packages/pymysql/err.py", line 109, in raise_mysql_exception
    raise errorclass(errno, errval)
ProgrammingError: (pymysql.err.ProgrammingError) (1064, u"You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '[(\\'dag_id\\', u\\'DataPipeline\\')]'')' at line 1") [SQL: u'INSERT INTO log (dttm, dag_id, task_id, event, execution_date, owner, extra) VALUES (%(dttm)s, %(dag_id)s, %(task_id)s, %(event)s, %(execution_date)s, %(owner)s, %(extra)s)'] [parameters: {'task_id': None, 'extra': "[('dag_id', u'DataPipeline')]", 'execution_date': None, 'event': 'tree', 'owner': 'anonymous', 'dttm': datetime.datetime(2018, 10, 6, 5, 28, 31, 180060, tzinfo=<Timezone [UTC]>), 'dag_id': u'DataPipeline'}]