| 发明名称 |
GLOBAL FILTER FACTOR ESTIMATION |
| 摘要 |
A computer maps a literal in a database query to a digital representation, wherein the database query comprises a predicate, the literal is a part of the predicate, and the digital representation is predetermined based at least in part on external statistical data. The computer estimates a filter factor for the predicate based at least in part on the digital representation and compressed statistical data, wherein the compressed statistical data are prepared at least in part from the external statistical data. |
| 申请公布号 |
US2017124134(A1) |
申请公布日期 |
2017.05.04 |
| 申请号 |
US201514930736 |
申请日期 |
2015.11.03 |
| 申请人 |
International Business Machines Corporation |
发明人 |
Wei Ke Wei;Weihrauch Maryela E.;Wu Hao;Yang Xin Ying;Zheng Miao |
| 分类号 |
G06F17/30 |
主分类号 |
G06F17/30 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A computer-implemented method for estimation of a filter factor comprising:
mapping a literal in a database query to a digital representation, wherein the database query comprises a predicate, the literal is a part of the predicate, and the digital representation is predetermined based at least in part on external statistical data; and estimating a filter factor for the predicate based at least in part on the digital representation and compressed statistical data, wherein the compressed statistical data are prepared at least in part from the external statistical data. |
| 地址 |
Armonk NY US |
