By default, ClearQuest USES optimistic record locking.
默认条件下，ClearQuest使用乐观的记录锁定。
Pessimistic record locking, which provides a way to prevent situations where multiple users can edit a record at the same time.
消极记录锁定，它提供了避免发生多个用户同时编辑一条记录情况的手段。
A FOR FETCH ONLY clause is added to the Select statement to avoid record locking and to take advantage of SQL automatic blocking.
一个FOR FETCHonly子句被添加到select语句，以避免记录锁定并利用SQL自动块操作的优势。
Methods of file locking and record locking or file unlocking and record locking or file unlocking and record unlocking were given.
给出，文件、记录加锁解锁的方法及解决死锁问题的途径。
A collection of SDOs that has been altered also maintains a record of its original values, enabling certain sorts of optimistic locking algorithms.
一组经过变更的SDO还会维护一条其原始值的记录，从而支持某种类型的乐观性锁定算法。
Pessimistic locking, where a record is locked while it is edited.
悲观的锁定，在编辑记录时将其锁定。
Optimistic locking, where a record is locked only when changes are committed to the database.
乐观的锁定，只当数据库发生更改时锁定记录。
On the other hand, if the database is the system of record, then you could use either optimistic locking or ObjectGrid’s built-in SCN support to detect and handle stale data in the cache.
另一方面，如果数据库是记录系统，那么您可以使用开放式锁定或ObjectGrid的内置SCN支持来检测和处理缓存中的过时数据。
Security refinements such as record-level locking.
安全改进，比如记录级别的锁定。
Optimistic Locking is a strategy where you read a record, take note of a version number and check that the version hasn't changed before you write the record back.
乐观锁是这样一种策略，你可以读取记录，记录版本号并检查，在你写回之前该版本没有改变。
This access method is unusual in that it provides record level locking. This can provide beneficial performance improvements in applications requiring concurrent access to the queue.
这种访问方式与众不同处在于他提供记录级别的锁。当程序需要并发的访问队列时，这一点可以提高性能。
This access method is unusual in that it provides record level locking. This can provide beneficial performance improvements in applications requiring concurrent access to the queue.
这种访问方式与众不同处在于他提供记录级别的锁。当程序需要并发的访问队列时，这一点可以提高性能。
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