text: -- @testpoint: opengauss关键字deallocate(非保留)，作为索引名，部分测试点合理报错
  
  --前置条件，创建一个表
  drop table if exists deallocate_test;
  create table deallocate_test(id int,name varchar(10));
  
  --关键字不带引号-成功
  drop index if exists deallocate;
  create index deallocate on deallocate_test(id);
  drop index deallocate;
  
  --关键字带双引号-成功
  drop index if exists "deallocate";
  create index "deallocate" on deallocate_test(id);
  drop index "deallocate";
  
  --关键字带单引号-合理报错
  drop index if exists 'deallocate';
  create index 'deallocate' on deallocate_test(id);
  
  --关键字带反引号-合理报错
  drop index if exists `deallocate`;
  create index `deallocate` on deallocate_test(id);
  drop table if exists deallocate_test;