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