docs: def version(**connection_args):
      '''
      Return the version of a MySQL server using the output from the ``SELECT
      VERSION()`` query.
  
      CLI Example:
  
      .. code-block:: bash
  
          salt '*' mysql.version
      '''
      dbc = _connect(**connection_args)
      if dbc is None:
          return ''
      cur = dbc.cursor()
      qry = 'SELECT VERSION()'
      try:
          _execute(cur, qry)
      except MySQLdb.OperationalError as exc:
          err = 'MySQL Error {0}: {1}'.format(*exc.args)
          __context__['mysql.error'] = err
          log.error(err)
          return ''
  
      try:
          return salt.utils.data.decode(cur.fetchone()[0])
      except IndexError:
          return ''