text: -- @testpoint: opengauss关键字message_text(非保留)，作为同义词对象名,部分测试点合理报错
  
  
  --前置条件
  drop table if exists explain_test;
  create table explain_test(id int,name varchar(10));
  
  --关键字不带引号-成功
  drop synonym if exists message_text;
  create synonym message_text for explain_test;
  insert into message_text values (1,'ada'),(2, 'bob');
  update message_text set message_text.name='cici' where message_text.id=2;
  select * from message_text;
  
  --关键字带双引号-成功
  drop synonym if exists "message_text";
  create synonym "message_text" for explain_test;
  
  
  --关键字带单引号-合理报错
  drop synonym if exists 'message_text';
  create synonym 'message_text' for explain_test;
  insert into 'message_text' values (1,'ada'),(2, 'bob');
  update 'message_text' set 'message_text'.name='cici' where 'message_text'.id=2;
  select * from 'message_text';
  
  --关键字带反引号-合理报错
  drop synonym if exists `message_text`;
  create synonym `message_text` for explain_test;
  insert into `message_text` values (1,'ada'),(2, 'bob');
  update `message_text` set `message_text`.name='cici' where `message_text`.id=2;
  select * from `message_text`;
  --清理环境
  drop synonym if exists "message_text";
  drop synonym if exists message_text;
  drop table if exists explain_test;