The segment name should correspond to ROLLBACK_SEGMENTS in init.ora.
段名称应该对应init . or a中的ROLLBACK_SEGMENTS。
No rollback segment name is specified. Please define a rollback name.
未指定回滚段名称。请指定一个回滚名称。
Typically, a segment name is not dynamically assigned; instead, it is well known, such as a constant in a header file, and easily referenced from other code.
通常，内存段名称并不是动态分配的；而是众所周知的，比如使用头文件中的常量，其他代码可以方便地引用它。
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