发明名称 |
Method and data processing system for detecting patterns in SQL to allow optimized use of multi-column indexes |
摘要 |
A database management optimizer detects patterns in SQL that occur when search conditions are present that represent ranges of values across multiple columns of a table. These patterns are recognized and translated into simpler key value ranges that can be used to provide more efficient use of database indexes.
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申请公布号 |
US6353821(B1) |
申请公布日期 |
2002.03.05 |
申请号 |
US19990472362 |
申请日期 |
1999.12.23 |
申请人 |
BULL HN INFORMATION SYSTEMS INC. |
发明人 |
GRAY JAMES E. |
分类号 |
G06F17/30;(IPC1-7):G06F17/30 |
主分类号 |
G06F17/30 |
代理机构 |
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