发明名称 |
SLOW MATERIALIZATION SORT OF PARTIALLY ORDERED INPUTS IN A DATABASE SYSTEM |
摘要 |
The invention improves performance of a query in a database system when a pl an for the query includes sorting an input that is at least partially sorted such that a slow materialization sort can be applied. The invention applies the slow materialization sort by determini ng a sequence of subsets in accordance with the partially sorted input. As each of the subset s is determined, the subset is output for further processing. Advantageously, the invention reduc es the waiting period for obtaining results from a sorting operation under certain circumstances.< /SDOAB>
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申请公布号 |
CA2427216(A1) |
申请公布日期 |
2004.10.30 |
申请号 |
CA20032427216 |
申请日期 |
2003.04.30 |
申请人 |
IBM CANADA LIMITED - IBM CANADA LIMITEE |
发明人 |
HORNIBROOK, JOHN F.;STORM, ADAM J.;ZILIO, DANIELE C.;FINLAY, IAN R.;FLASZA, MIROSLAW A. |
分类号 |
G06F7/24;G06F17/30;(IPC1-7):G06F17/30;G06F9/44 |
主分类号 |
G06F7/24 |
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