数据库结构更改,从主键删除了搜索路径。
Database structure change to remove search path from primary keys.
但是这种数据结构并不能使删除或暂挂不再相关的线程变得容易。
But this data structure does nothing to make it easy to remove or suspend threads that are no longer relevant.
可以使用CREATE type语句创建一个结构化类型,并使用drop语句删除结构化类型。
Use the create type statement to create a structured type, and use the DROP statement to delete a structured type.
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