text: --  @testpoint:openGauss保留关键字left作为视图名
  
   --不带引号-合理报错
    CREATE or replace VIEW left AS
      SELECT * FROM pg_tablespace WHERE spcname = 'pg_default';
  	
   --加双引号-创建成功
      CREATE  or replace VIEW "left" AS
      SELECT * FROM pg_tablespace WHERE spcname = 'pg_default';
  	
   --清理环境	
      drop VIEW "left";
  	
   --加单引号-合理报错
   CREATE or replace VIEW 'left' AS
   SELECT * FROM pg_tablespace WHERE spcname = 'pg_default';
   
   --加反引号-合理报错
   CREATE or replace VIEW `left` AS
   SELECT * FROM pg_tablespace WHERE spcname = 'pg_default';