text: """
  Copyright (c) 2022 Huawei Technologies Co.,Ltd.
  
  openGauss is licensed under Mulan PSL v2.
  You can use this software according to the terms and conditions of the Mulan PSL v2.
  You may obtain a copy of Mulan PSL v2 at:
  
            http://license.coscl.org.cn/MulanPSL2
  
  THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
  EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
  MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
  See the Mulan PSL v2 for more details.
  """
  """
  Case Type   : GUC
  Case Name   : 使用gs_guc set方法设置参数codegen_cost_threshold为50000,
                观察预期结果
  Description :
          1.查询codegen_cost_threshold默认值
          2.修改参数值为50000并重启数据库
          3.查询该参数修改后的值
          4.恢复参数默认值
  Expect      :
          1.显示默认值为10000
          2.修改成功
          3.显示50000
          4.默认值恢复成功
  History     :
  """
  import unittest
  
  from testcase.utils.CommonSH import CommonSH
  from testcase.utils.Constant import Constant
  from testcase.utils.Logger import Logger
  
  LOG = Logger()
  commonsh = CommonSH('dbuser')
  
  
  class QueryPlan(unittest.TestCase):
  
      def setUp(self):
          self.constant = Constant()
          LOG.info(
              '------Opengauss_Function_Guc_Queryplan_Case0095start------')
  
      def test_codegen_cost_threshold(self):
          LOG.info('--步骤1:查看默认值--')
          sql_cmd = commonsh.execut_db_sql('show codegen_cost_threshold;')
          LOG.info(sql_cmd)
          self.res = sql_cmd.splitlines()[-2].strip()
          LOG.info('--步骤2:设置codegen_cost_threshold并重启数据库--')
          msg = commonsh.execute_gsguc('set',
                                       self.constant.GSGUC_SUCCESS_MSG,
                                       'codegen_cost_threshold =50000')
          LOG.info(msg)
          self.assertTrue(msg)
          msg = commonsh.restart_db_cluster()
          LOG.info(msg)
          status = commonsh.get_db_cluster_status()
          self.assertTrue("Degraded" in status or "Normal" in status)
          LOG.info('--步骤3:查询该参数修改后的值--')
          sql_cmd = commonsh.execut_db_sql('show codegen_cost_threshold;')
          LOG.info(sql_cmd)
          self.assertIn('50000', sql_cmd)
  
      def tearDown(self):
          LOG.info('--步骤4:恢复默认值--')
          sql_cmd = commonsh.execut_db_sql('show codegen_cost_threshold;')
          LOG.info(sql_cmd)
          if self.res != sql_cmd.split('\n')[-2].strip():
              msg = commonsh.execute_gsguc('set',
                                           self.constant.GSGUC_SUCCESS_MSG,
                                           f"codegen_cost_threshold={self.res}")
              LOG.info(msg)
              msg = commonsh.restart_db_cluster()
              LOG.info(msg)
          status = commonsh.get_db_cluster_status()
          self.assertTrue("Degraded" in status or "Normal" in status)
          sql_cmd = commonsh.execut_db_sql('show codegen_cost_threshold;')
          LOG.info(sql_cmd)
          LOG.info(
              '-----Opengauss_Function_Guc_Queryplan_Case0095执行完成------')
  