text: --  @testpoint:opengauss关键字passing(非保留)，自定义数据类型名为passing
  --关键字passing作为数据类型不带引号，创建成功
  drop type if exists passing;
  CREATE TYPE passing AS (f1 int, f2 text);
  select typname from pg_type where typname ='passing';
  drop type passing;
  
  
  --关键字passing作为数据类型加双引号，创建成功
  drop type if exists "passing";
  CREATE TYPE "passing" AS (f1 int, f2 text);
  select typname from pg_type where typname ='passing';
  drop type "passing";
  
  --关键字passing作为数据类型加单引号，合理报错
  drop type if exists 'passing';
  CREATE TYPE 'passing' AS (f1 int, f2 text);
  select * from pg_type where typname ='passing';
  drop type 'passing';
  
  --关键字passing作为数据类型加反引号，合理报错
  drop type if exists `passing`;
  CREATE TYPE `passing` AS (f1 int, f2 text);
  select * from pg_type where typname =`passing`;
  drop type `passing`;