[If a book were] very innocent, and one which might be confided to the reason of any man; not likely to be much read if let alone, but if persecuted, it will be generally read.
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Pessimistic session locks should generally be write locks; they should let other users read the locked data, unless there is a very strong case to not do so.
悲观会话锁通常为写入锁,它们允许其他用户读取锁定的数据,除非遇到不能读取的情况。
The transaction log is stored as a sequential disk file (or sometimes in a raw partition) and will generally only be written to, not read from, except in the case of rollback or recovery.
事务日志存储为连续的磁盘文件(有时存储在原始分区中),并且一般只是用于写入而不用于读取,回滚或恢复的情况例外。
You should generally avoid such an index unless your application is mostly read-only and you really cannot predict which elements will be used in search conditions.
一般情况下,应该避免使用此类索引,除非应用程序大部分是只读的,并且确实无法预测在搜索条件中使用哪些元素。
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