02 2022 档案

15 Advanced Techniques and Mechanisms ODB高级技术和机制

摘要：15.1 Transaction Callbacks 事务回调 The ODB transaction class (odb::transaction) allows an application to register a callback that will be called after th 阅读全文

posted @ 2022-02-23 14:10 菜鸟_IceLee 阅读(115) 评论(0) 推荐(0) 编辑

13 Database Schema Evolution ODB数据库模式演变

摘要：When we add new persistent classes or change the existing ones, for example, by adding or deleting data members, the database schema necessary to stor 阅读全文

posted @ 2022-02-22 15:08 菜鸟_IceLee 阅读(189) 评论(0) 推荐(0) 编辑

3 Working with Persistent Objects ODB使用持久对象

摘要：The previous chapters gave us a high-level overview of ODB and showed how to use it to store C++ objects in a database. In this chapter we will examin 阅读全文

posted @ 2022-02-17 11:46 菜鸟_IceLee 阅读(308) 评论(0) 推荐(0) 编辑

14 ODB Pragma Language ODB编程语言

摘要：As we have already seen in previous chapters, ODB uses a pragma-based language to capture database-specific information about C++ types. This chapter 阅读全文

posted @ 2022-02-16 11:41 菜鸟_IceLee 阅读(293) 评论(0) 推荐(0) 编辑

12 Optimistic Concurrency ODB 乐观并发

摘要：The ODB transaction model (Section 3.5, "Transactions") guarantees consistency as long as we perform all the database operations corresponding to a sp 阅读全文

posted @ 2022-02-11 11:27 菜鸟_IceLee 阅读(81) 评论(0) 推荐(0) 编辑