Patent · US Active

Nondisruptive overflow avoidance of tuple validity timestamps in temporal database systems

US8538922B2 · kind B2 · utility

7Cited by

6References

13Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

Felix Beier · Haigerloch, DE
Oliver Koeth · Stuttgart, DE
Knut Stolze · Jena, DE

Key dates

Filing date	Oct 11, 2010
Grant date	Sep 17, 2013
Priority date	—
Expiry date	Sep 29, 2031

Classification

Technology area (CPC G)Physics
CPC primaryG06F16/2477
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A first epoch column pair includes a first global identification (ID) having first maximum value. A second epoch column pair includes a second global identification having second maximum value. The first epoch column pair receives first snapshots, and the first global ID increases with each of the first snapshots. When first global ID reaches first maximum value minus 1, switch to the second epoch column pair. The second epoch column pair receives second snapshots, and second global ID increases with each of the second snapshots. First global ID and first epoch column pair are reset, based on conditions. When second global ID reaches first maximum value minus 1, switch back to first epoch column pair. The first epoch column pair again receives first snapshots, and the first global ID increases with each of the second snapshots. Second global ID and second epoch column pair are reset, based on conditions.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.