Lightweight table comparison
US9928281B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2015 |
| Grant date | Mar 27, 2018 |
| Priority date | — |
| Expiry date | Jul 26, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/25
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system, method and computer program product for enabling light weight table comparison with high-accuracy (high confidence) of tables where one is a copy of the other, which copy may be maintained synchronized by replication. The method performs database comparison using a sample-based, statistics-based, or materialized query tables-based approaches. The method first identifies a block comprising a sub-set of rows of data of a source database table and a corresponding block from a target database table, and obtains a statistical value associated with each block. Then the statistical values for the corresponding source and target block are compared and a consistency evaluation of source and target database is determined based on comparing results. Further methods enable a determination of the data as being persistent or not in manner that accounts for real-time data modifications to underlying source and target database tables while identified blocks are being compared.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.