MySQL 8.4 Release Notes
作为本快速入门指南的一部分，提供了一个示例模式，该模式称为 world_x 模式。许多示例使用此模式演示文档存储功能。启动您的 MySQL 服务器以便加载 world_x 模式，然后按照以下步骤操作：As part of this quick-start guide, an example schema is provided
which is referred to as the world_x schema.
Many of the examples demonstrate Document Store functionality
using this schema. Start your MySQL server so that you can load
the world_x schema, then follow these steps:
下载 world_x-db.zip。Download world_x-db.zip.
将安装归档文件解压到临时位置，例如
/tmp/。解压归档文件会生成一个名为world_x.sql的文件。Extract the installation archive to a temporary location such as/tmp/. Unpacking the archive results in a single file namedworld_x.sql.将
world_x.sql文件导入到您的服务器。您可以选择：Import theworld_x.sqlfile to your server. You can either:以 SQL 模式启动 MySQL Shell，并通过执行以下命令导入该文件：Start MySQL Shell in SQL mode and import the file by issuing:
mysqlsh -u root --sql --file /tmp/world_x-db/world_x.sqlEnter password:****在 MySQL Shell 运行时，将其设置为 SQL 模式，并通过执行以下命令导入 schema 文件：Set MySQL Shell to SQL mode while it is running and source the schema file by issuing:
\sqlSwitching to SQL mode... Commands end with ;\source /tmp/world_x-db/world_x.sql
将
/tmp/替换为系统中world_x.sql文件的路径。如果提示，请输入密码。只要账户具有创建新 schema 的权限，就可以使用非 root 账户。Replace/tmp/with the path to theworld_x.sqlfile on your system. Enter your password if prompted. A non-root account can be used as long as the account has privileges to create new schemas.
world_x 示例 schema 包含以下 JSON 集合和关系表：The world_x example schema contains the
following JSON collection and relational tables:
集合Collection
countryinfo：关于世界各国的信息。countryinfo: Information about countries in the world.
表格Tables
country：关于世界各国的最基本信息。country: Minimal information about countries of the world.city：关于这些国家的一些城市的信息。city: Information about some of the cities in those countries.countrylanguage：每个国家使用的语言。countrylanguage: Languages spoken in each country.
MySQL Shell 会话 解释了会话类型。MySQL Shell Sessions explains session types.