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