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

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 foreign 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 rigorously reviewed and chosen from a hundred and five submissions. the papers are geared up in topical sections on entry equipment, complicated question processing, information mining and knowledge warehousing, distance-based queries, mobility and relocating issues administration, modeling and languages, similarity processing, platforms and implementation issues.

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

Example text

1 Let v be a version and vr be a version range with v ∈ vr. Split (vr , v ) generates two version ranges: split-off(vr, v): The part of the version range that is “split-off ” is defined by – start( split-off (vr, v)) = v, – end( split-off (vr, v)) = {v |v ∈ end(vr) and v ∈ dec(v)}. Split-off is the subset of vr whose members are descendants of v. split-remain(vr, v): The part of the version range that “remains” is defined by – start( split-remain (vr, v)) = start(vr), – end( split-remain (vr, v)) = (end(vr) ∪ {start( split-off (vr, v))} − end( splitoff (vr, v)).

Let vr satisfy vr ⊆ V R(path(r, P )) and the end set of vr is empty. We call splitting page P in such a way that the split off is vr R-splitting. After the split, page P corresponds to version range (V R(BEF ORE(P )) − vr) where BEF ORE(P ) represents the page P before splitting. The new page created out of the split corresponds to the version range vr. 4 why the end set is required to be empty in the definition of R-splitting. Many version ranges vr may satisfy the definition for R-splitting. The next section considers which split-off version range to choose for an R-split.

B) Version-split page D1 at (1, 18). We use V R(I) to represent the version range corresponding to page I and KR(D) to represent the key range corresponding to page D represent all the data corresponding to versions in V R2 and key k, we say the record variant (v2 , k, d) is valid at versions in V R2. BT-Tree Splits. Each page in the BT-Tree corresponds to a key range and version range and only contains information related to the key range and version range. As shown in Figure 2 (a), when the BT-Tree gets started, there is only one index page and one data page with both pages corresponding to the key space and the entire version space.

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