事务控制(Control of Transactions) 基于规则的优化器 -- Rule Based (Heuristic) Optimization(简称RBO): .
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unnecessary copies of control transactions 管理业务上不太必要的副件
Concurrency control of transactions is the emphasis of such study.
而事务的并发控制,则是研究的重点。
However, it may be necessary at times to have further control of transactions.
然而,有时对事务进行进一步的控制也是很必要的。
Besides, This paper also discusses the implementation mechanism of distributed directory and simultaneous control of transactions.
同时,本文还重点讨论了模型中的目录管理和事务并发控制的实现机制。
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