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Advances in Spatial and Temporal Databases: 8th by Christian S. Jensen, Torben Bach Pedersen, Laurynas Speičys,

By Christian S. Jensen, Torben Bach Pedersen, Laurynas Speičys, Igor Timko (auth.), Thanasis Hadzilacos, Yannis Manolopoulos, John Roddick, Yannis Theodoridis (eds.)

This e-book constitutes the refereed complaints of the eighth overseas Symposium on Spatial and Temporal Databases, SSTD 2003, held at Santorini Island, Greece in July 2003.

The 28 revised complete papers awarded including a keynote paper have been conscientiously reviewed and chosen from one zero five submissions. the papers are equipped in topical sections on entry equipment, complex question processing, facts mining and knowledge warehousing, distance-based queries, mobility and relocating issues administration, modeling and languages, similarity processing, structures and implementation issues.

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Additional info for Advances in Spatial and Temporal Databases: 8th International Symposium, SSTD 2003, Santorini Island, Greece, July 2003. Proceedings

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I2 V 24 V 25 V 26 V 27 V 28 V5 V6 V7 V8 V 36 V 37 V 38 (1, 25) I4 I5 I5 I4 e (1, 18) D3 D1 V1 V2 V3 V4 D5 D4 D3 D2 D1 V0 g e D3 D5 D2 D4 split_remain(VR1, V 4 ) VR1 (a) split_off(VR1, V 4 ) (b) Fig. 4. (a) Version-split the current root page I4, creating a new index page I5 and a new root I2. (b) An example of version range splitting Now that we’ve introduced vsh nodes and ksh nodes, the simple searching algorithm of the BT-Tree can be easily understood. Suppose we are searching for a record with version v and key k.

We compare the version query efficiency of the BT-Tree and the BTR-Tree for branch one. Branch one is considered as a respresentative because it has the maximum number of record variants among the 100 branches. As time proceeds, all other branches may reach a state having as many record variants as branch one now. (The analysis for other branches are similar). We consider the current version query efficiency measured by the number of data pages containing record variants valid at current version. Table 3 shows the number of data pages that needs to be accessed for both the BT-Tree and the BTR-Tree for the current version query in branch one.

28, 34, 35, 43, 44 [6] Gad M. Landau, Jeanette P. Schmidt, and Vassilis J. Tsotras. Historical queries along multiple lines of time evolution. VLDB Journal, 4, pages 703–726, 1995. 28 [7] Sitaram Lanka and Eric Mays. Fully persistent B+-trees. In Proceedings of the ACM SIGMOD conference on Management of Data, Denver, CO, 1991. 29 [8] David Lomet and Betty Salzberg. The performance of a multiversion access method. In Proceedings of the ACM SIGMOD conference on Management of Data, pages 354–363, 1990.

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