text: --  @testpoint:opengauss关键字Isolation(非保留)，作为表空间名
  
  
  --关键字不带引号，创建成功
  drop tablespace if exists Isolation;
  CREATE TABLESPACE Isolation RELATIVE LOCATION 'hdfs_tablespace/hdfs_tablespace_1';
  drop tablespace Isolation;
   
  --关键字带双引号，创建成功
  drop tablespace if exists "Isolation";
  CREATE TABLESPACE "Isolation" RELATIVE LOCATION 'hdfs_tablespace/hdfs_tablespace_1'; 
  drop tablespace "Isolation";
  
  --关键字带单引号，合理报错
  drop tablespace if exists 'Isolation';
  CREATE TABLESPACE 'Isolation' RELATIVE LOCATION 'hdfs_tablespace/hdfs_tablespace_1'; 
  
  --关键字带反引号，合理报错
  drop tablespace if exists `Isolation`;
  CREATE TABLESPACE `Isolation` RELATIVE LOCATION 'hdfs_tablespace/hdfs_tablespace_1';
  
  