发明名称 |
Computerized index file interrogation and comparison |
摘要 |
A method of comparing files takes three passes through data tables in memory to generate tables containing pointers to matches and mismatches by employing a method of keyword-index translation in which a keyword is taken from a first data table in a first pass and used as the index in loading an index table containing a pointer to the record containing that keyword. In a symmetric operation, a keyword is fetched from one table and used to interrogate the corresponding index table in a second pass. If there is a match, the record in the index table contains the pointer; and if there is a mismatch, the record contains a null. In an optional third pass, keywords are fetched from the other table and used to find records in the other table that are mismatches.
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申请公布号 |
US5659730(A) |
申请公布日期 |
1997.08.19 |
申请号 |
US19960729710 |
申请日期 |
1996.10.07 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
KELLEY, EDWARD EMILE;PALEVEDA, JOHN FREDERICK |
分类号 |
G06F12/00;G06F7/02;G06F17/30;(IPC1-7):G06F17/30 |
主分类号 |
G06F12/00 |
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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