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51CTO
1月
CMU15-445 数据库系统播客:查询执行模型与数据访问
本节课强调,数据库查询计划的执行方式有多种,具体取决于数据库系统所处的环境和所处理的工作负载。在大多数情况下,DBMS会尽可能优先使用索引扫描。而表达式树虽然灵活易懂,但在处理大量数据时会因其解释执行的特性而变得缓慢,因此通过 JIT编译 将 ...
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