护身符
发表于 2025-4-1 05:49:11
http://reply.papertrans.cn/27/2646/264516/264516_61.png
Endometrium
发表于 2025-4-1 09:48:07
Ronald Hitzler,Michaela Pfadenhauerbe used to express both user level queries as well as low-level evaluation strategies or access plans. This property enables rule-based query optimization to be viewed as the process of . expressions in such a language: “non-procedural” sub-expressions are gradually replaced by more “procedural” sub