Synchronous parallel database transformations

Autoren Klaus-Dieter Schewe
Qing Wang
Editoren T. Lukasiewicz
A. Sali
TitelSynchronous parallel database transformations
BuchtitelFoundations of Data and Knowledge Systems, Proc. FoIKS 2012
Typin Konferenzband
SerieLecture Notes in Computer Science
SCCH ID#1201

The DB-ASM thesis states that every database transformation can be expressed by a variant of Abstract State Machines. These machines permit unbounded parallelism only on the finite database part of a state. This paper generalises this work by permitting unbounded parallelism on the algorithmic partof the state as well. The ''parallel DB-ASM'-thesis results from combining Gurevich's parallel ASM thesis with the DB-ASM thesis. In doing so, it turns out that the postulates for synchronous parallel database transformations can be significantly simplified compared with the seminal work of Gurevich. The key idea is to generalise the notion of bounded exploration witnesses allowing them to include special non-ground terms.