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