发明名称 |
METHOD OF EVALUATING A RECURSIVE QUERY OF A DATABASE |
摘要 |
A method of evaluating a recursive query in a database (11). A recursive query is translated (13) into a relational algebra expression which includes a new fixpoint operator. The fixpoint operator supports mutually recursive and linearly recursive queries. The resulting expression is optimized (15) according to a set of fixpoint procedures. |
申请公布号 |
WO9215066(A1) |
申请公布日期 |
1992.09.03 |
申请号 |
WO1992US01458 |
申请日期 |
1992.02.25 |
申请人 |
HEWLETT-PACKARD COMPANY |
发明人 |
SHAN, MING-CHIEN;NEIMAT, MARIE-ANNE |
分类号 |
G06F17/30 |
主分类号 |
G06F17/30 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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