text: --  @testpoint:opengauss关键字message_text(非保留)，作为模式名
  
  
  --关键字不带引号-成功
  drop schema if exists message_text;
  create schema message_text;
  drop schema message_text;
  
  --关键字带双引号-成功
  drop schema if exists "message_text";
  create schema "message_text";
  drop schema "message_text";
  
  --关键字带单引号-合理报错
  drop schema if exists 'message_text';
  create schema 'message_text';
  
  --关键字带反引号-合理报错
  drop schema if exists `message_text`;
  create schema `message_text`;
  