Collection of statistics for spatial columns or R-tree indexes
US8335783B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 28, 2010 |
| Grant date | Dec 18, 2012 |
| Priority date | — |
| Expiry date | Jun 17, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/24542
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Techniques for collecting statistics of column data or R-Tree indexes are provided. A distributed database system includes a plurality of processing nodes controlling portions of spatial data. The nodes are instructed to create minimum bounding rectangles (MBR's) for their spatial data or R-Trees. The individual MBR's are merged and reformatted into a grid of equally sized cells. Each processing node is provided a copy of the grid to update based on statistics of each processing node's spatial data for a target table. The updated grids are then merged into a single grid and used by an optimizer to evaluate queries before the queries are executed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.