ORA-01562：failed to extend rollback segment number string
错误码
错误描述：failed to extend rollback segment number string
错误原因：Failure occurred when trying to extend rollback segment
解决方法：This is normally followed by another error message that caused the failure. You may take the rollback segment offline to perform maintainence. Use the alter rollback segment offline command to take the rollback segment offline.
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