When you use tools that impose limits on the length of external identifiers 当使用限制外部标识符长度的工具时。
Health informatics - messages and communication - format of length limited globally unique string identifiers 健康信息学.信息和通信.全球唯一线形标识符长度限制的格式
If the maximum identifier length is too small , certain predefined identifiers will be unresolved as well as certain library function calls 如果最大标识符长度太小,则将无法解析某些预定义标识符以及某些库函数调用。
Sql server limits identifiers of schema components to a maximum length of 1000 unicode characters and rejects schemas with identifiers that exceed the maximum length . also , 对于sql server ,架构组件标识符的最大长度不能超过1000个unicode字符,并且标识符长度超过此值的架构都将被拒绝。