In the pessimistic locking scheme, explicit locks are taken against rows using the SQL SELECT FOR UPDATE statement. Data is then modified, and an SQL UPDATE is issued.

在悲观锁定方案中，通过使用SQLSELECTFORupdate语句对数据行进行显式锁定，然后更改数据，并执行SQL UPDATE。

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Also it introduces the operation principle of positioning and locking scheme.

介绍了一种定位与锁定方案的工作原理。

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This paper proposes a hybrid optimistic real-time transaction concurrency control method based on high priority two phase locking scheme (HORTCC-SHP2PL).

提出了一种基于高优先级两段锁的混合乐观实时事务并发控制协议(HORTCC -SHP2PL)。

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This paper proposes a hybrid optimistic real-time transaction concurrency control method based on high priority two phase locking scheme (HORTCC-SHP2PL).

提出了一种基于高优先级两段锁的混合乐观实时事务并发控制协议(HORTCC -SHP2PL)。

youdao