However, in some cases, you will need to read cursors both forward and backward, in which case you should use scrollable cursor.

但某些情况下，您需要游标既能向前又能向后，此时需要使用可滚动游标。

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Another approach is to explicitly open the cursor again after ROLLBACK and skip the cursor pointer till the record read at the time of ROLLBACK.

另一种方法是在ROLLBACK之后再次显式地打开游标，然后在ROLLBACK时把游标指针跳到读取的记录。

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Supports table and row level locking and 4 isolation levels, RR (repeatable read), rs (read stability), CS (default - cursor stability) and ur (uncommitted read).

支持表级和行级锁以及4个隔离级别：RR(可重复读)、RS(读可靠)、CS(默认——游标可靠)和UR(未提交读)。

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