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公开(公告)号:US20060230017A1
公开(公告)日:2006-10-12
申请号:US11094924
申请日:2005-03-31
申请人: Per-Ake Larson , David DeHann , Jingren Zhou
发明人: Per-Ake Larson , David DeHann , Jingren Zhou
IPC分类号: G06F17/30
CPC分类号: G06F17/30457 , Y10S707/99932 , Y10S707/99933 , Y10S707/99934
摘要: A system for optimizing queries against a database is disclosed. The system comprises a memo structure that encodes a plurality of query expressions. The system also includes a signature mechanism that enables an assignment of the query expressions into equivalence classes. Methods of using such a system are additionally provided.
摘要翻译: 公开了一种用于优化针对数据库的查询的系统。 该系统包括对多个查询表达式进行编码的备忘录结构。 该系统还包括一个签名机制,可以将查询表达式分配为等价类。 另外提供使用这种系统的方法。